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Difficulty: 3 of 5Pairwise Differences (in Numbers)
Posted on 2024-04-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum of Two (in Numbers) Rating: 5.00
Posted on 2024-04-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Find the real number (in Just Math)
Posted on 2024-04-25 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Digits of N^3 (in Numbers) Rating: 5.00
Posted on 2024-04-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Closest to two dozens (in Word Problems)
Posted on 2024-04-24 by Ady TZIDON (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Given Product Equaling 1, Find the Square (in Just Math)
Posted on 2024-04-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Strong Problem (in Numbers)
Posted on 2024-04-24 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Complex Roots Unleashed (in Just Math)
Posted on 2024-04-23 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Multinational equation (in Word Problems)
Posted on 2024-04-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Decagonal Intersection Delight (in Geometry)
Posted on 2024-04-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Powers of Digits (in Numbers)
Posted on 2024-04-21 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5A Complex Geometrical Conundrum (in Just Math)
Posted on 2024-04-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Maximus (in Logic) Rating: 4.00
Posted on 2024-04-20 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Well-known French Name (in Numbers)
Posted on 2024-04-19 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A quick inverse (in Just Math)
Posted on 2024-04-19 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The tricky substitution (in Just Math)
Posted on 2024-04-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5My criteria (in Sequences)
Posted on 2024-04-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Last Four Digits (in Just Math) Rating: 5.00
Posted on 2024-04-17 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Floor Equation (in Just Math)
Posted on 2024-04-16 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangular Cube #2 (in Numbers)
Posted on 2024-04-15 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Symmetric Pentagon Delight (in Geometry)
Posted on 2024-04-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Some Sum Cubes is the Multiple of a Cube (in Numbers)
Posted on 2024-04-13 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Suggest a mnemonic (in Word Problems)
Posted on 2024-04-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Counting Trapeziums in Regular Polygons (in Just Math)
Posted on 2024-04-12 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Graph and coordinate manipulation (in Just Math)
Posted on 2024-04-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Digital Product Triples #2 (in Numbers)
Posted on 2024-04-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Find the formula (in Just Math)
Posted on 2024-04-10 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A cube within a cone (in Just Math) Rating: 4.00
Posted on 2024-04-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Exploring Coprime Roots in Quadratic Equations (in Just Math)
Posted on 2024-04-09 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5In or out? (in Probability)
Posted on 2024-04-09 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Pell's Equation #2 (in Numbers)
Posted on 2024-04-08 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Seventh Power Arranger (in Numbers)
Posted on 2024-04-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Happy birthday, man (in Word Problems)
Posted on 2024-04-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadratic composition equation (in Just Math)
Posted on 2024-04-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Where are thou, ADY? (in Numbers)
Posted on 2024-04-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Primes in fraction (in Just Math)
Posted on 2024-04-05 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Lattice Pentagon (in Geometry)
Posted on 2024-04-04 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prime Lottery (in Games)
Posted on 2024-04-03 by Larry (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Unequal tetrahedron (in Shapes)
Posted on 2024-04-02 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Cubes (in Numbers)
Posted on 2024-04-02 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Top Trapezium (in Just Math)
Posted on 2024-04-01 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5What Number Comes Next (in Numbers) Rating: 5.00
Posted on 2024-03-31 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cut off the Tail (in Numbers)
Posted on 2024-03-31 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5B-Palindromes 2 (in Algorithms)
Posted on 2024-03-30 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Equilateral triangle by distances (in Shapes)
Posted on 2024-03-29 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5A Riddle for the Ages (in Just Math) Rating: 3.00
Posted on 2024-03-29 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Evaluate area (in Just Math)
Posted on 2024-03-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Sum of distinct digit number (in Just Math) Rating: 3.00
Posted on 2024-03-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Maximizing products (in Just Math)
Posted on 2024-03-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Some factorial and some power (in Just Math) Rating: 3.00
Posted on 2024-03-26 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5No squareless triplets (in Just Math)
Posted on 2024-03-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 53 3s times 3 3s has 9 9s (in Numbers) Rating: 5.00
Posted on 2024-03-24 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Theorem's proof (in Numbers)
Posted on 2024-03-23 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Counting Partitions (in Just Math)
Posted on 2024-03-21 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Odd divisor summation (in Just Math)
Posted on 2024-03-21 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Minimizing ones (in Just Math) Rating: 5.00
Posted on 2024-03-20 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Chests (in Logic)
Posted on 2024-03-20 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Blue majority (in Probability)
Posted on 2024-03-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Irrationals to integers and back again (in Numbers)
Posted on 2024-03-17 by Steven Lord (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Election (in General) Rating: 5.00
Posted on 2024-03-17 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5 Averaging factorials (in Just Math)
Posted on 2024-03-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sine square and cubes (in Just Math)
Posted on 2024-03-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Semi-1 number (in Just Math)
Posted on 2024-03-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5No business like your business (in Just Math)
Posted on 2024-03-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An even sparser sudoku puzzle (in Numbers)
Posted on 2024-03-11 by Steven Lord (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Differences 2 (in Numbers)
Posted on 2024-03-11 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A formal proof required (in Sequences)
Posted on 2024-03-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Deciphering the Duel (in Just Math)
Posted on 2024-03-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rich Uncle (in Numbers)
Posted on 2024-03-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Three Accountants Crossed Four Numbers Puzzle (in Numbers) Rating: 5.00
Posted on 2024-03-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Partition (in Numbers)
Posted on 2024-03-07 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Constrained triangle (in Just Math)
Posted on 2024-03-07 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Even preferred? (in Probability)
Posted on 2024-03-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Differences (in Numbers) Rating: 5.00
Posted on 2024-03-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Heart in a circle (in Geometry)
Posted on 2024-03-05 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Altering Pickup Routine (in Just Math)
Posted on 2024-03-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Prime to perfect square (in Just Math)
Posted on 2024-03-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A factorial pattern (in Numbers)
Posted on 2024-03-03 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum of k numbers has exactly k divisors (in Numbers)
Posted on 2024-03-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Edge Crossed Vertex Puzzle (in Shapes)
Posted on 2024-03-02 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Geometric Mean Crossed Ratio Puzzle (in Just Math)
Posted on 2024-03-02 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Row of towers, Part 2 (in Probability)
Posted on 2024-03-01 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Four Squares #3 (in Numbers)
Posted on 2024-03-01 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5tetrahedron contained in a sphere (in Shapes)
Posted on 2024-02-29 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Non Prime Integer Inquiry (in Just Math)
Posted on 2024-02-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Pythagorean Triples #3 (in Numbers)
Posted on 2024-02-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mostly 52 (in Probability) Rating: 5.00
Posted on 2024-02-27 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Second derivative of a cosine product (in Calculus) Rating: 5.00
Posted on 2024-02-27 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Who wins? 2 (in Probability)
Posted on 2024-02-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Equation enigma (in Just Math) Rating: 5.00
Posted on 2024-02-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Equal averages (in Just Math) Rating: 3.00
Posted on 2024-02-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Row of towers (in Shapes)
Posted on 2024-02-23 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5An unlikely solution! (in Just Math)
Posted on 2024-02-21 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Ellipse covered by 2 circles (in Calculus)
Posted on 2024-02-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Helping without trig (in Just Math)
Posted on 2024-02-19 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Polygon Perimeter (in Just Math)
Posted on 2024-02-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Define the members of S (in Just Math)
Posted on 2024-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Multiplication Includes All Digits (in Numbers)
Posted on 2024-02-16 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Coordinate calculations (in Just Math) Rating: 4.00
Posted on 2024-02-15 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Remainder Reckoning (in Numbers) Rating: 4.00
Posted on 2024-02-15 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Inradius as the GCD of sides (in Just Math) Rating: 4.00
Posted on 2024-02-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5XOXOXOXOX (in Numbers)
Posted on 2024-02-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5cosine equated to polynomial (in Just Math)
Posted on 2024-02-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Equal cubic roots (in Just Math)
Posted on 2024-02-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Dartboard (in Numbers) Rating: 5.00
Posted on 2024-02-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Try integration (in Calculus)
Posted on 2024-02-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pythagorean Triples #2 (in Numbers)
Posted on 2024-02-09 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Hyperbolic center (in Just Math)
Posted on 2024-02-06 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Infinite reciprocal summation (in Just Math)
Posted on 2024-02-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Same Digits #4 (in Numbers)
Posted on 2024-02-04 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Terrific sequence 3 (in Sequences) Rating: 5.00
Posted on 2024-02-04 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Doubly cube (in Just Math)
Posted on 2024-02-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Non existence root (in Just Math)
Posted on 2024-02-02 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Neponacci. (in Numbers) Rating: 4.00
Posted on 2024-02-01 by broll (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Difference of Two Expressions equal n (in Just Math)
Posted on 2024-01-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The First Lady (in Probability) Rating: 5.00
Posted on 2024-01-30 by Ady TZIDON (No Solution Yet, 12 Comments)
Difficulty: 1 of 5Boston to London voyage (in Just Math)
Posted on 2024-01-29 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Red and Blue chips (in Just Math)
Posted on 2024-01-28 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Picking boxes (in Just Math) Rating: 3.00
Posted on 2024-01-28 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Super power equation (in Just Math)
Posted on 2024-01-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Parallelogram pyramid (in Shapes)
Posted on 2024-01-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Shift in perspective (in Calculus) Rating: 2.00
Posted on 2024-01-25 by Danish Ahmed Khan (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Permutation (in Numbers) Rating: 5.00
Posted on 2024-01-24 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Back to derivative basics (in Calculus)
Posted on 2024-01-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Capped down sequence (in Just Math)
Posted on 2024-01-20 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Find the Last Two Digits II (in Numbers)
Posted on 2024-01-20 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Many approaches to solve it (in Just Math)
Posted on 2024-01-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadratic Powered Quadratic (in Just Math) Rating: 4.00
Posted on 2024-01-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Another Four Reals (in Numbers)
Posted on 2024-01-17 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Tripartite words (in Logic)
Posted on 2024-01-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Heronian Triangles (in Numbers)
Posted on 2024-01-16 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Double number digit sum (in Numbers) Rating: 4.00
Posted on 2024-01-16 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Triangle's features (in Geometry)
Posted on 2024-01-15 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 520 and 40 (in Numbers)
Posted on 2024-01-14 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Alphabetic Order (in General)
Posted on 2024-01-13 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5T442444 (in Cryptography)
Posted on 2024-01-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Power reversed pairs (in Just Math)
Posted on 2024-01-12 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5More Than Four Tangent Circles (in Shapes)
Posted on 2024-01-11 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5x powered equals square (in Just Math)
Posted on 2024-01-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Given Cubic, Solve For Real (in Just Math)
Posted on 2024-01-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mr. S and Mr. P (in Numbers)
Posted on 2024-01-08 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Liz's lying day (in Logic) Rating: 4.00
Posted on 2024-01-08 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Quick fatorization (in Just Math)
Posted on 2024-01-06 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Largest shadow of a cube (in Just Math)
Posted on 2024-01-05 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Think polynomial (in Numbers)
Posted on 2024-01-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 54-digit number (in Numbers) Rating: 5.00
Posted on 2024-01-03 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Words like swords (in Word Problems)
Posted on 2024-01-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fibonacci sequence (in Just Math)
Posted on 2023-12-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Total Number of Real Solutions (in Just Math)
Posted on 2023-12-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Square root and cubic root equality (in Just Math)
Posted on 2023-12-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Filtering a phrase (in Word Problems)
Posted on 2023-12-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Functional Finding (in Just Math)
Posted on 2023-12-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Price estimation (in General) Rating: 3.00
Posted on 2023-12-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Phone Squad (in Just Math)
Posted on 2023-12-22 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Connecting the Dots (in Shapes)
Posted on 2023-12-22 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Integer Solutions (in Numbers)
Posted on 2023-12-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cyclic maximization (in Just Math)
Posted on 2023-12-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Consecutive cosines (in Just Math)
Posted on 2023-12-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 53 Hats (in Logic)
Posted on 2023-12-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5People (in Word Problems)
Posted on 2023-12-17 by Ady TZIDON (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Cubic Equation (in Numbers)
Posted on 2023-12-17 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Extreme Fibonacci (in Just Math)
Posted on 2023-12-15 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Old Foskins (in General)
Posted on 2023-12-14 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Circle in a trapezoid (in Geometry)
Posted on 2023-12-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Angle finding (in Geometry)
Posted on 2023-12-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cubic root cyclic summation (in Just Math)
Posted on 2023-12-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bug on a Cube 4 (in Probability)
Posted on 2023-12-08 by Larry (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Triple angle perimeter minimized (in Geometry)
Posted on 2023-12-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Maximum of divisor contraints (in Just Math)
Posted on 2023-12-07 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Clue+2=New (in Word Problems)
Posted on 2023-12-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bug on a Cube 3 (in Probability)
Posted on 2023-12-05 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Don't Square this Equation (in Just Math)
Posted on 2023-12-04 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 4 of 513 new words (in Word Problems)
Posted on 2023-12-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Lighthouse Kerfuffle (in Probability)
Posted on 2023-12-02 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangle cosine (in Geometry)
Posted on 2023-12-01 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Incircle in a semicircle (in Geometry)
Posted on 2023-11-30 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Letter Categories (in Shapes)
Posted on 2023-11-29 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Bug on a Cube 2 (in Probability)
Posted on 2023-11-27 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Lighthouse Crossed Three Lights Mashup (in General)
Posted on 2023-11-27 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Power growth (in Just Math)
Posted on 2023-11-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Embedded Digital Product (in Numbers)
Posted on 2023-11-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Elementary, my dear Watson. (in Cryptography)
Posted on 2023-11-25 by broll (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Inflection Point Line (in Just Math)
Posted on 2023-11-24 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pentagon maximized (in Geometry)
Posted on 2023-11-23 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Square sweep (in Geometry)
Posted on 2023-11-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Dissected square with center intact (in Shapes)
Posted on 2023-11-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find all possible pairs (in Just Math)
Posted on 2023-11-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mayday (in Games)
Posted on 2023-11-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prime pair (in Just Math)
Posted on 2023-11-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Limit of Sum Expressions (in Numbers)
Posted on 2023-11-16 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Ten Squares (in Numbers)
Posted on 2023-11-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Smells Trigonometric (in Just Math)
Posted on 2023-11-12 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5An insane puzzle (in Liars and Knights) Rating: 5.00
Posted on 2023-11-11 by Math Man (No Solution Yet, 9 Comments)
Difficulty: 3 of 5House Numbers on the Clock Street (in Numbers)
Posted on 2023-11-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two cases (in Sequences)
Posted on 2023-11-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Four Squares II (in Numbers)
Posted on 2023-11-09 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Both Squares (in Numbers)
Posted on 2023-11-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5complex trigonometry (in Just Math)
Posted on 2023-11-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Those were the days, my friend (in General) Rating: 5.00
Posted on 2023-11-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5N^2 and N^3 (in Numbers) Rating: 5.00
Posted on 2023-11-03 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 596 Tees (in Numbers)
Posted on 2023-11-01 by Larry (No Solution Yet, 2 Comments)
Difficulty: 4 of 5LCM and Equality Puzzle 2 (in Just Math)
Posted on 2023-10-31 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Consider prime numbers, get cube 2 (in Numbers)
Posted on 2023-10-30 by broll (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Three Pandigital Cube (in Numbers)
Posted on 2023-10-29 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Even degree and Odd coefficient Crossed Polynomial Poser (in Just Math)
Posted on 2023-10-29 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5123456 Triangle (in Numbers)
Posted on 2023-10-28 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Big Palindrome (in Numbers)
Posted on 2023-10-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5ABCD Simultaneous (in Numbers)
Posted on 2023-10-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5EMIRP pair inside a PRIME (in Numbers)
Posted on 2023-10-19 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum of the unknowns (in Numbers)
Posted on 2023-10-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Sixth powers (in Numbers)
Posted on 2023-10-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5half power (in Just Math)
Posted on 2023-10-16 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Factorials' product (in Numbers)
Posted on 2023-10-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Locus in a triangle (in Geometry) Rating: 4.00
Posted on 2023-10-09 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5n-Pandigital and k-Divisible (in Numbers)
Posted on 2023-10-08 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prime power pair (in Just Math)
Posted on 2023-10-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Grandma (in Numbers)
Posted on 2023-10-07 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Introducing Nova numbers (in General) Rating: 1.00
Posted on 2023-10-06 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Cubic equation relation (in Just Math)
Posted on 2023-10-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Math in letters 2 (in Just Math) Rating: 4.67
Posted on 2023-10-04 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Special demands (in Just Math)
Posted on 2023-10-02 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Find Another Function (in Just Math)
Posted on 2023-10-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sock Sorting Space (in Probability)
Posted on 2023-09-30 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Crossing the x axis (in Just Math)
Posted on 2023-09-29 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Near powers (in Numbers)
Posted on 2023-09-28 by broll (No Solution Yet, 2 Comments)
Difficulty: 3 of 53 circles in a sliced square II (in Shapes)
Posted on 2023-09-26 by Jer (No Solution Yet, 0 Comments)
Difficulty: 2 of 5One number missing (in Numbers) Rating: 4.00
Posted on 2023-09-25 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Checking the quantity (in Numbers)
Posted on 2023-09-23 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Concatenated Pandigital (in Numbers)
Posted on 2023-09-23 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 53 circles in a sliced square (in Geometry)
Posted on 2023-09-22 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Tiling with Triominoes (in Shapes)
Posted on 2023-09-22 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Inserting a number into 2023 (in Numbers)
Posted on 2023-09-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Marquez's Equation 2 (in Numbers)
Posted on 2023-09-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reversing Minute Hand Clock (in Just Math)
Posted on 2023-09-19 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 53 unknowns (in Just Math)
Posted on 2023-09-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Golden sine (in Just Math) Rating: 4.00
Posted on 2023-09-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Sawtooth Sum Settlement (in Just Math)
Posted on 2023-09-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5From the root of cubic polynomial (in Just Math) Rating: 4.50
Posted on 2023-09-16 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Polynomial and exponential (in Just Math)
Posted on 2023-09-15 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A cubic equation (in Just Math) Rating: 4.00
Posted on 2023-09-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Symmetric expressions (in Just Math)
Posted on 2023-09-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Double Embedding (in Numbers)
Posted on 2023-09-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Minimum of an expression (in Just Math) Rating: 4.00
Posted on 2023-09-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Integer factorial fraction (in Numbers)
Posted on 2023-09-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Bulbs and Switches III (in Probability)
Posted on 2023-09-10 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Is It Rational? (in Just Math)
Posted on 2023-09-09 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Area of an Obtuse triangle from Equilateral triangle (in Geometry)
Posted on 2023-09-08 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fractional side constraint (in Just Math)
Posted on 2023-09-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The tangent formula (in Just Math) Rating: 4.00
Posted on 2023-09-06 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Side constraint for maximizing area (in Just Math)
Posted on 2023-09-04 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Matrix probability (in Probability)
Posted on 2023-09-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Powerful Parade (in Numbers) Rating: 4.00
Posted on 2023-09-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Triangle at a square corner (in General)
Posted on 2023-09-02 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Intermediate between two functions (in Calculus)
Posted on 2023-08-31 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5lcm divided by gcd (in Just Math)
Posted on 2023-08-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ten not welcomed... (in Probability)
Posted on 2023-08-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Book page number (in Just Math)
Posted on 2023-08-29 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Square off from rectangle (in Just Math) Rating: 4.00
Posted on 2023-08-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Find pairs by Euclid (in Just Math)
Posted on 2023-08-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Easy rhombus angle measurement (in Geometry)
Posted on 2023-08-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Parabola triangle (in Just Math)
Posted on 2023-08-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Concatenated Triangular Numbers (in Numbers) Rating: 4.00
Posted on 2023-08-25 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5So many pairs... (in Just Math)
Posted on 2023-08-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A clock area (in Just Math)
Posted on 2023-08-23 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Near pi Equation Solution Settlement (in Just Math)
Posted on 2023-08-23 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Logic of pets (in Logic) Rating: 4.50
Posted on 2023-08-21 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Minimum distance between sets (in Just Math)
Posted on 2023-08-21 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Similar triangle split (in Geometry)
Posted on 2023-08-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Age function (in Just Math)
Posted on 2023-08-17 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Cheap or expensive (in Numbers)
Posted on 2023-08-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Obtuse triangle from equilateral triangle (in Geometry) Rating: 4.50
Posted on 2023-08-14 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Explore a diophantine equation (in Just Math)
Posted on 2023-08-14 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Power to factorial (in Just Math) Rating: 4.00
Posted on 2023-08-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Cubic roots manipulation (in Just Math)
Posted on 2023-08-12 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Value Validation II (in Just Math)
Posted on 2023-08-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A positive determinant (in Just Math)
Posted on 2023-08-11 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Four Powers (in Just Math) Rating: 4.00
Posted on 2023-08-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Card rotation (in Just Math)
Posted on 2023-08-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Maximize Rectangle on Semicircle in Triangle (in Calculus)
Posted on 2023-08-08 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Ten-thousands Digit Determination (in Numbers) Rating: 4.00
Posted on 2023-08-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Easy KISS problem (in Just Math)
Posted on 2023-08-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 53 perfect squares (in Just Math) Rating: 3.00
Posted on 2023-08-01 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Cosine ratio to Sine (in Just Math)
Posted on 2023-08-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Circle's convergence (in Just Math)
Posted on 2023-07-31 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Irrational powered equation (in Just Math)
Posted on 2023-07-30 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 57-11 game payoffs (in Probability)
Posted on 2023-07-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Seven-digit Number (in Numbers) Rating: 5.00
Posted on 2023-07-28 by Larry (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Lucky Guests Crossed Distinct Colored Hat Conclusion (in Numbers)
Posted on 2023-07-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Simple composite number (in Numbers)
Posted on 2023-07-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Restricted ternary numbers (in Numbers)
Posted on 2023-07-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Consecutive inequality (in Numbers)
Posted on 2023-07-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Forming a formula (in Just Math)
Posted on 2023-07-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Simultaneous equation (in Just Math)
Posted on 2023-07-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Pairs by rearranging (in Just Math)
Posted on 2023-07-22 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Divisor count ratio (in Just Math)
Posted on 2023-07-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Concatenate Three Primes, Make Six Primes (in Numbers)
Posted on 2023-07-20 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Trisected segment (in Geometry)
Posted on 2023-07-18 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Maharaja's diamonds (in Just Math) Rating: 5.00
Posted on 2023-07-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Prime power pairs (in Just Math)
Posted on 2023-07-16 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Simultaneous inequality? (in Just Math)
Posted on 2023-07-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Maximize Pyramid (in Shapes)
Posted on 2023-07-14 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Only two digits (in Probability)
Posted on 2023-07-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Cubic Summation divisibility (in Numbers)
Posted on 2023-07-13 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Triangle of Sticks (in Just Math)
Posted on 2023-07-11 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Find the matching word (in General)
Posted on 2023-07-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Trigonometry with altitudes (in Geometry)
Posted on 2023-07-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Binomial Coefficient Crossed GCD Concern (in Numbers)
Posted on 2023-07-08 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Sick flick (in Word Problems) Rating: 5.00
Posted on 2023-07-08 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Parabolas hugging a hexagon (in Geometry) Rating: 4.33
Posted on 2023-07-07 by Jer (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Finding 2022nd derivative (in Calculus)
Posted on 2023-07-07 by K Sengupta (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Dodecagon Based Pyramid (in Shapes)
Posted on 2023-07-06 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Remainder Crossed Digit Permutation Resolution (in Numbers)
Posted on 2023-07-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cubic Root Comparison (in Just Math) Rating: 5.00
Posted on 2023-07-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Radar decoded (in Just Math)
Posted on 2023-07-01 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Ranging roots (in Just Math)
Posted on 2023-06-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Recover the faulty word (in Word Problems)
Posted on 2023-06-29 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Try a tricky solution (in Just Math)
Posted on 2023-06-28 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Golden Substitution (in Just Math)
Posted on 2023-06-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Diamond and Graphite (in Science) Rating: 3.50
Posted on 2023-06-27 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Vigorous derivative? (in Calculus)
Posted on 2023-06-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5More solutions, please (in Just Math)
Posted on 2023-06-23 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Sliding pennies #4 (in General)
Posted on 2023-06-22 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Some Linear Combination of Prime May Be a Perfect Square (in Numbers)
Posted on 2023-06-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Minimizing disjoint sum (in Just Math)
Posted on 2023-06-20 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Sliding pennies #3 (in General) Rating: 5.00
Posted on 2023-06-13 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Pick two (in Probability)
Posted on 2023-06-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Coded Crossword 4 (in Cryptography)
Posted on 2023-06-07 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5The determinant is divisible by three (in Just Math)
Posted on 2023-06-05 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Surprising answer III (in Numbers)
Posted on 2023-06-04 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Binomial and Floor Difference Crossed Division Determination (in Just Math) Rating: 2.00
Posted on 2023-06-03 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Friendly numbers (in Numbers)
Posted on 2023-06-02 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Unsolved (so far) problem (in General)
Posted on 2023-05-31 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Evaluate sin(6°) (in Just Math)
Posted on 2023-05-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Quick estimate (in Numbers) Rating: 1.00
Posted on 2023-05-24 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Cute equation. (in Just Math)
Posted on 2023-05-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5He gave me S and asked for X (in Just Math) Rating: 3.00
Posted on 2023-05-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5From M to N (in Just Math)
Posted on 2023-05-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Almost Tic-Tac-Toe (in Games)
Posted on 2023-05-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 518 Integers, 36 digits (in Numbers)
Posted on 2023-05-19 by Larry (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Unit square overlap II (in Calculus)
Posted on 2023-05-18 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Twelve (in Sequences)
Posted on 2023-05-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Unit square overlap I (in Calculus)
Posted on 2023-05-12 by Jer (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Large factor product (in Numbers) Rating: 5.00
Posted on 2023-05-10 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Cryptarithmetic Crossed Geometric Mean Poser (in Numbers)
Posted on 2023-05-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5High powers involved (in Just Math)
Posted on 2023-05-09 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Wanted: the value(s) of the polynomial (in Just Math)
Posted on 2023-05-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Rock smashing competition (in Probability)
Posted on 2023-05-08 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5May I help you ? (in Cryptography)
Posted on 2023-05-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Take five (in Just Math)
Posted on 2023-05-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Math, not magic (in Just Math)
Posted on 2023-05-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Ones and Twos (in Just Math)
Posted on 2023-05-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Find the Function (in Just Math)
Posted on 2023-05-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Pick 6 get power of 6 (in Numbers)
Posted on 2023-05-03 by Jer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Counting the wounded (in Just Math)
Posted on 2023-05-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mission impossible? (in Numbers)
Posted on 2023-05-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A Complex Equation (in Just Math) Rating: 4.00
Posted on 2023-04-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A polynomial equation (in Just Math)
Posted on 2023-04-26 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 1 of 5Ay. ay. ay (in Just Math)
Posted on 2023-04-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Rebus (in Word Problems)
Posted on 2023-04-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Triple seven power (in Just Math) Rating: 3.00
Posted on 2023-04-21 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Prime sums (in Numbers) Rating: 5.00
Posted on 2023-04-19 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Function of a function (in Just Math)
Posted on 2023-04-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Nice infinite series (in Sequences)
Posted on 2023-04-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Conjugate and radical equation (in Just Math)
Posted on 2023-04-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Basic trigo equation (in Just Math)
Posted on 2023-04-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Carpe Diem (in Numbers) Rating: 4.00
Posted on 2023-04-07 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Seems unlikely, but is not … (in Just Math)
Posted on 2023-04-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Factorials galore (in Sequences) Rating: 5.00
Posted on 2023-04-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Floored parabola (in Just Math)
Posted on 2023-04-03 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5An irrational answer (in Numbers)
Posted on 2023-03-30 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 552-card lottery (in Probability) Rating: 5.00
Posted on 2023-03-29 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Tea Team Quickie (in Numbers)
Posted on 2023-03-28 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three sins (in Just Math) Rating: 4.00
Posted on 2023-03-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5NYT Vertex puzzle query (in Games)
Posted on 2023-03-23 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Power after power (in Just Math)
Posted on 2023-03-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Fifth Powers (in Just Math) Rating: 4.00
Posted on 2023-03-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Two ways to solve (in Just Math) Rating: 4.00
Posted on 2023-03-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Find the algorithm (in Sequences)
Posted on 2023-03-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 56 teams (in Probability)
Posted on 2023-03-17 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 53 circles in a rectangle (in Geometry) Rating: 5.00
Posted on 2023-03-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Comparing results (in Probability)
Posted on 2023-03-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum of two squares (in Numbers) Rating: 5.00
Posted on 2023-03-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 52 square roots (in Just Math) Rating: 4.00
Posted on 2023-03-12 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 3 of 5A troublesome number puzzle (in Numbers)
Posted on 2023-03-10 by Jer (No Solution Yet, 2 Comments)
Difficulty: 1 of 5 SupraRef Indexing (in Paradoxes)
Posted on 2023-03-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Competing friends (in Probability)
Posted on 2023-03-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A simple p&p equation (in Just Math)
Posted on 2023-03-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Types of Transportation (in Word Problems)
Posted on 2023-03-05 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Two vending machines (in Probability)
Posted on 2023-03-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5WG’s quintuple (in Numbers) Rating: 4.00
Posted on 2023-02-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Evaluate x (in Just Math)
Posted on 2023-02-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Line Up 2 (in Games)
Posted on 2023-02-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triplet Trouble (in Sequences)
Posted on 2023-02-23 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Possible Pisano Poser? (in Numbers) Rating: 4.00
Posted on 2023-02-21 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 54 distinct pairs (in Just Math)
Posted on 2023-02-20 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Eyed at cab (in Riddles)
Posted on 2023-02-09 by Steven Lord (No Solution Yet, 1 Comments)
Difficulty: 3 of 5sod(N) = pod(sqrt(N)) (in Numbers)
Posted on 2023-02-09 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Packing similar rectangles (in Shapes)
Posted on 2023-02-08 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Name the base (in Just Math) Rating: 4.00
Posted on 2023-02-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Comb polyominos (in Shapes)
Posted on 2023-02-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prisons foes (in Word Problems) Rating: 5.00
Posted on 2023-02-02 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Partially filled cone (in Geometry)
Posted on 2023-02-01 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Integers with Happy, Healthy Babies (in Numbers)
Posted on 2023-01-26 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ducks in a pond (in Probability) Rating: 5.00
Posted on 2023-01-24 by Jer (No Solution Yet, 17 Comments)
Difficulty: 3 of 5LCM, Sum and Product Puzzle (in Numbers)
Posted on 2023-01-13 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three digits (in Numbers) Rating: 5.00
Posted on 2023-01-10 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 51 2 3 4. How high is your score? (in Numbers)
Posted on 2023-01-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bless you, Blaise! (in Probability)
Posted on 2022-12-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Gaussian Rectangle Problem (in Just Math)
Posted on 2022-12-23 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Ukraine war (in Word Problems)
Posted on 2022-12-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5More Tangential Trapezoids (in Geometry)
Posted on 2022-12-16 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Take it EZ (in Just Math) Rating: 5.00
Posted on 2022-12-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rising above the ceiling (in Probability) Rating: 5.00
Posted on 2022-12-06 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Special Words 3 (in Word Problems) Rating: 5.00
Posted on 2022-12-04 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Fraction-Fraction-Fraction Finding (in Numbers)
Posted on 2022-12-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Tangential Trapezoid (in Geometry)
Posted on 2022-11-30 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Prime or Composite? (in Numbers)
Posted on 2022-11-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A square 2 (in Numbers) Rating: 5.00
Posted on 2022-11-26 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A square of squares (in Numbers)
Posted on 2022-11-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Nonn, easy, nice. (in Just Math)
Posted on 2022-11-23 by broll (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A running theme. (in General)
Posted on 2022-11-21 by broll (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A Game of Dice Puzzle (in Probability)
Posted on 2022-11-14 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5All vowels disclosed (in Word Problems)
Posted on 2022-11-12 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Prime Possibility Poser (in Numbers)
Posted on 2022-11-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5MP’s word (in Word Problems)
Posted on 2022-11-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Binomial Coefficient Product Puzzle (in Numbers) Rating: 5.00
Posted on 2022-11-07 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Homeric Character Conclusion (in Word Problems)
Posted on 2022-11-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Moving Quarters II (in General) Rating: 5.00
Posted on 2022-11-02 by K Sengupta (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Sorting Coins III (in Weights and Scales) Rating: 4.00
Posted on 2022-10-26 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Four Floored Cube Finding (in Numbers)
Posted on 2022-10-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Distance through a cube (in Shapes)
Posted on 2022-10-20 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Knot Tying Travail (in Probability) Rating: 5.00
Posted on 2022-10-16 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Three Distinct Divisor Trial (in Numbers)
Posted on 2022-10-15 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Mystery sequence (in Sequences) Rating: 5.00
Posted on 2022-10-13 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Fifth Root Finding (in Algorithms) Rating: 5.00
Posted on 2022-09-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Get one fourth by squaring (in Numbers) Rating: 5.00
Posted on 2022-09-27 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ring sets (in Geometry) Rating: 5.00
Posted on 2022-09-22 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5One, Two, Three, Floor Integral 2 (in Calculus) Rating: 4.00
Posted on 2022-09-20 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sums of floors and fractionals (in Just Math) Rating: 5.00
Posted on 2022-09-18 by Jer (No Solution Yet, 6 Comments)
Difficulty: 1 of 5The Highlife (in Cryptography)
Posted on 2022-09-16 by Steven Lord (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Pandigital Multiple Puzzle (in Numbers) Rating: 4.00
Posted on 2022-09-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Scrabble numbers that score themselves (in Word Problems)
Posted on 2022-09-09 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two Cask Mixture Muse (in Weights and Scales) Rating: 5.00
Posted on 2022-09-08 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Many types (in Liars and Knights) Rating: 5.00
Posted on 2022-09-03 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tic Tac Toe IV (in Games) Rating: 4.00
Posted on 2022-08-23 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A Cold and Frosty Morning (in Science) Rating: 4.00
Posted on 2022-08-15 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Cubic Diophantine Conclusion II (in Numbers) Rating: 3.00
Posted on 2022-08-13 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 57 somewhere (in Numbers) Rating: 5.00
Posted on 2022-08-12 by Jer (No Solution Yet, 16 Comments)
Difficulty: 4 of 5Binary Repunit Padovans (in Numbers) Rating: 5.00
Posted on 2022-08-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Perplexus arrangement (in Just Math) Rating: 3.00
Posted on 2022-08-08 by Jer (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Wordle (in Games) Rating: 5.00
Posted on 2022-08-01 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5From sum to addends 2 (in Numbers) Rating: 5.00
Posted on 2022-07-28 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Product Crossed Pointed Ratio Puzzle (in Numbers) Rating: 5.00
Posted on 2022-07-27 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 4 of 5381654729 (in Just Math) Rating: 2.50
Posted on 2022-07-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Perfect Powers with no Repeat Digits (in Numbers) Rating: 5.00
Posted on 2022-07-22 by Larry (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Pair of quadrilaterals (in Geometry)
Posted on 2022-07-21 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Brothers Crossed Eye Color Puzzle (in Logic) Rating: 1.00
Posted on 2022-07-20 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A square deal (in Sequences) Rating: 3.00
Posted on 2022-07-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 53 out of 5 (in Just Math) Rating: 5.00
Posted on 2022-07-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Spellements 2 (in General) Rating: 4.00
Posted on 2022-07-15 by Larry (No Solution Yet, 12 Comments)
Difficulty: 3 of 5The Game of Keno (in Probability) Rating: 4.00
Posted on 2022-07-12 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three clocks (in Just Math)
Posted on 2022-07-10 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Spellements (in General)
Posted on 2022-07-09 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5SOD(power) = power (in Numbers) Rating: 5.00
Posted on 2022-07-07 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mrs. Arithmetic and Mrs. Algebra (in Numbers) Rating: 5.00
Posted on 2022-07-05 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Two Hourglass Treat (in Weights and Scales) Rating: 4.00
Posted on 2022-07-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pro and con (in Word Problems) Rating: 5.00
Posted on 2022-07-03 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Restless Retreat Resolution (in Logic) Rating: 5.00
Posted on 2022-07-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5West of Evan, East of Odin (in Numbers)
Posted on 2022-06-29 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Checking the score (in Cryptography) Rating: 4.00
Posted on 2022-06-27 by broll (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three Card Trial (in Logic)
Posted on 2022-06-26 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5See you (in Riddles) Rating: 3.00
Posted on 2022-06-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cycles of roots as coefficients (in Just Math) Rating: 5.00
Posted on 2022-06-16 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Hexagon area ratio (in Geometry) Rating: 4.00
Posted on 2022-06-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Primorial Penultimate Piece (in Numbers) Rating: 5.00
Posted on 2022-06-14 by Larry (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Arithmetic Derivative (in Numbers) Rating: 5.00
Posted on 2022-06-10 by Larry (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Sorta Platonic... (in Numbers) Rating: 5.00
Posted on 2022-06-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Maximum Palindrome Count Muse (in Numbers) Rating: 5.00
Posted on 2022-06-07 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quaint Quadruplet Query (in Numbers) Rating: 5.00
Posted on 2022-06-06 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Nested radical redux (in Numbers) Rating: 5.00
Posted on 2022-06-04 by Jer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Nested radical (in Numbers) Rating: 5.00
Posted on 2022-06-03 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5'- subject to availability -' (in Probability) Rating: 2.33
Posted on 2022-06-02 by broll (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Three Pasture Puzzle (in Numbers) Rating: 5.00
Posted on 2022-06-01 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Last house on the street (in Just Math) Rating: 4.00
Posted on 2022-05-31 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Forty Four Digit Decision (in Numbers) Rating: 5.00
Posted on 2022-05-30 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Lexicographic Listing (in Algorithms) Rating: 4.00
Posted on 2022-05-29 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5What base? (in Just Math) Rating: 4.00
Posted on 2022-05-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Parametric Quadratic Diophantine Dilemma (in Numbers) Rating: 5.00
Posted on 2022-05-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Equally divided (in Numbers) Rating: 3.00
Posted on 2022-05-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Fifth Thursdays and Sundays (in Algorithms) Rating: 5.00
Posted on 2022-05-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 52^n mod n (in Just Math) Rating: 4.00
Posted on 2022-05-13 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Googol vs Googolplex (in Numbers) Rating: 4.50
Posted on 2022-05-12 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Even percents (in Numbers) Rating: 5.00
Posted on 2022-05-10 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 52 incompatible words (in Word Problems) Rating: 5.00
Posted on 2022-05-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Car Thief Identification (in Logic)
Posted on 2022-05-08 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5The Playlist (in Probability) Rating: 5.00
Posted on 2022-04-28 by Kenny M (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Counting words (in Just Math) Rating: 5.00
Posted on 2022-04-27 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Simple set (in Just Math) Rating: 4.00
Posted on 2022-04-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 53 Pals make a Pal (in Numbers) Rating: 5.00
Posted on 2022-04-20 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Move the digit, Change the base (in Numbers) Rating: 5.00
Posted on 2022-04-19 by Larry (No Solution Yet, 10 Comments)
Difficulty: 2 of 5L OR H (in Weights and Scales) Rating: 3.00
Posted on 2022-04-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5From a to z (in Just Math) Rating: 4.50
Posted on 2022-04-17 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Digit Replacement and Square Settlement (in Numbers) Rating: 5.00
Posted on 2022-04-11 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Eventual Inverse Function (in Just Math) Rating: 4.00
Posted on 2022-04-08 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5All the nines (in Numbers) Rating: 5.00
Posted on 2022-04-07 by broll (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Darn you Wordle! (in Word Problems) Rating: 5.00
Posted on 2022-04-05 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A Kiss solution (in General) Rating: 3.50
Posted on 2022-04-04 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Integral Roots (in Just Math) Rating: 5.00
Posted on 2022-04-01 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Flipflop the digits, octuple the number (in Numbers) Rating: 5.00
Posted on 2022-03-30 by Larry (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Slim chance? (in Probability) Rating: 4.00
Posted on 2022-03-28 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Attributed to Ramanujan (in Just Math) Rating: 4.00
Posted on 2022-03-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Some inflation ! (in Numbers) Rating: 5.00
Posted on 2022-03-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5sum, reciprocals, squares (in Numbers) Rating: 4.00
Posted on 2022-03-22 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Rational Reverse Crossed Product Resolution (in Numbers) Rating: 4.00
Posted on 2022-03-18 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Square and triangle on centers (in Geometry) Rating: 4.00
Posted on 2022-03-17 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Palindrome factors (in Numbers) Rating: 5.00
Posted on 2022-03-15 by Jer (No Solution Yet, 8 Comments)
Difficulty: 1 of 5Pi Day (in Word Problems) Rating: 4.50
Posted on 2022-03-14 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Squares on each others centers (in Geometry) Rating: 3.00
Posted on 2022-03-11 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inverse Root Difference Crossed Zeros Puzzle (in Just Math) Rating: 5.00
Posted on 2022-03-09 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5An Olympic trial II (in Just Math) Rating: 4.00
Posted on 2022-03-08 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Villes Et Etats Des Etats-Unis (in General) Rating: 5.00
Posted on 2022-03-05 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 2 of 5An Olympic trial (in Calculus) Rating: 4.00
Posted on 2022-03-01 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Counterfeit Coins Conclusion (in Weights and Scales) Rating: 5.00
Posted on 2022-02-28 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5No consecutive 1's (in Numbers) Rating: 5.00
Posted on 2022-02-27 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Very peculiar feature ! (in Numbers) Rating: 5.00
Posted on 2022-02-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Announced vs Final rank average (in Probability) Rating: 5.00
Posted on 2022-02-23 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Powerful portions (in Games) Rating: 4.00
Posted on 2022-02-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inconsiderable Five-Prime Ratio Illation II (in Numbers) Rating: 5.00
Posted on 2022-02-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Announced rank average (in Probability) Rating: 4.00
Posted on 2022-02-16 by Jer (No Solution Yet, 3 Comments)
Difficulty: 4 of 5A hard nut (in Sequences)
Posted on 2022-02-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 52 parallel chords (in Geometry) Rating: 4.00
Posted on 2022-02-10 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Five sentences (in Logic) Rating: 5.00
Posted on 2022-02-09 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Checkerboard Chance Conclusion (in Probability) Rating: 5.00
Posted on 2022-02-07 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 1 of 5Why? a quickie (in Numbers) Rating: 5.00
Posted on 2022-02-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Triangle in a rectangle (in Geometry) Rating: 4.00
Posted on 2022-02-03 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Toll of two towns (in Just Math)
Posted on 2022-02-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Four Friends and Die Puzzle (in Logic) Rating: 3.00
Posted on 2022-01-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Pentagonal Time (in General)
Posted on 2022-01-30 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Difference is sod sum (in Numbers) Rating: 4.00
Posted on 2022-01-28 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Golden Ratio Gradation (in Algorithms) Rating: 5.00
Posted on 2022-01-27 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Hexagon's square coverage (in Geometry) Rating: 4.00
Posted on 2022-01-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5All in (in Numbers) Rating: 4.00
Posted on 2022-01-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Closest approaches (in Geometry) Rating: 3.00
Posted on 2022-01-14 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Pandiv 143 (in Numbers) Rating: 4.00
Posted on 2022-01-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Time After Time (in Numbers) Rating: 4.00
Posted on 2022-01-11 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Age of ages (2) (in Just Math) Rating: 5.00
Posted on 2022-01-08 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Either way (in Numbers) Rating: 5.00
Posted on 2022-01-05 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Choose a job you like… (in Word Problems) Rating: 5.00
Posted on 2021-12-26 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A Special Cubic Tangent (in Calculus) Rating: 4.00
Posted on 2021-12-24 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 3 of 56 out of 20 (in Cryptography) Rating: 5.00
Posted on 2021-12-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Add a Z-word (in General) Rating: 4.00
Posted on 2021-12-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 55 peaceful rooks (in Just Math) Rating: 3.50
Posted on 2021-12-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Straight Up Inequality (in Just Math) Rating: 3.00
Posted on 2021-12-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5 Ninety Seven and Divisibility Nuance (in Just Math) Rating: 4.00
Posted on 2021-12-12 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 5 of 5Text to math to text (in General) Rating: 4.33
Posted on 2021-12-11 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Laics prove (in General)
Posted on 2021-12-10 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A nim variation (in Games) Rating: 5.00
Posted on 2021-12-09 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5ABBA words a.k.a. Test #12: (in Word Problems) Rating: 4.00
Posted on 2021-12-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Mas o menos vs comme il faut (in Just Math) Rating: 4.00
Posted on 2021-12-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Differentiation Crossed Inverse Derivation (in Calculus) Rating: 4.00
Posted on 2021-12-03 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Periodic functional equation (in Just Math)
Posted on 2021-12-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Count the trailing zeros (in Just Math) Rating: 4.00
Posted on 2021-11-30 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Calculating the Inverse Rule (in Calculus) Rating: 4.00
Posted on 2021-11-26 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Wholesum continuity and differentiability (in Calculus)
Posted on 2021-11-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Complex function (in Just Math)
Posted on 2021-11-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cubic computation (in Just Math)
Posted on 2021-11-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Prove or verify (in Just Math) Rating: 4.00
Posted on 2021-11-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5What digit is there? (in Just Math) Rating: 3.00
Posted on 2021-11-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Partially illuminated cone (in Calculus) Rating: 5.00
Posted on 2021-11-12 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Tea-Time TauTology (in Word Problems) Rating: 5.00
Posted on 2021-11-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Simple complex numbers (in Just Math)
Posted on 2021-11-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pax vobiscum (in General) Rating: 5.00
Posted on 2021-11-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Plain similarity (in Geometry)
Posted on 2021-10-29 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Hexomino tile enumeration (in Numbers) Rating: 4.00
Posted on 2021-10-27 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Left/Right side story (in Word Problems) Rating: 4.00
Posted on 2021-10-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Restaurant Rock and Roll (in Word Problems) Rating: 4.00
Posted on 2021-10-22 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Quad-Ominoes (in Numbers) Rating: 4.00
Posted on 2021-10-20 by Jer (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Cubic conundrum (in Just Math) Rating: 4.00
Posted on 2021-10-18 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Function at least 2 (in Just Math)
Posted on 2021-10-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Actual triominoes (in Numbers) Rating: 4.00
Posted on 2021-10-13 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Independent projections (in Geometry) Rating: 4.00
Posted on 2021-10-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Limited Orientation Triominoes (in Shapes) Rating: 3.00
Posted on 2021-10-08 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Sequence Sum Situation (in Sequences) Rating: 3.00
Posted on 2021-10-06 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5....and the 100th member is (in Sequences) Rating: 3.33
Posted on 2021-10-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Symmetrical biquadratic (in Just Math)
Posted on 2021-10-01 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Expo 7629 (in Numbers) Rating: 4.00
Posted on 2021-09-27 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Imaginary triangles (in Just Math)
Posted on 2021-09-24 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Imagine the points (in Just Math)
Posted on 2021-09-22 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Range (in Just Math)
Posted on 2021-09-20 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Largest circle in quadrilateral (in Geometry)
Posted on 2021-09-17 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Polynomial substitution (in Just Math)
Posted on 2021-09-15 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Legally Blonde 2 (in Liars and Knights) Rating: 3.67
Posted on 2021-09-13 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 55 equilaterals (in Geometry) Rating: 5.00
Posted on 2021-09-10 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The 10th distance (in Just Math) Rating: 4.50
Posted on 2021-09-06 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Grid squares (in Just Math)
Posted on 2021-09-03 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Bishops galore (in Games) Rating: 4.00
Posted on 2021-09-01 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Angle bisector in isosceles trapezoid (in Geometry) Rating: 3.00
Posted on 2021-08-30 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Bivariate equation (in Numbers)
Posted on 2021-08-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5SOD revealed (in General) Rating: 5.00
Posted on 2021-08-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Derivative inequation (in Calculus)
Posted on 2021-08-25 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Two spherical scoops (in Shapes) Rating: 4.00
Posted on 2021-08-24 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Inconvenient points (in Just Math)
Posted on 2021-08-23 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5More balanced weighing (in Just Math)
Posted on 2021-08-20 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 52 neighbours create a square (in Numbers) Rating: 4.00
Posted on 2021-08-19 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Prime pair equation (in Numbers)
Posted on 2021-08-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Planar factor graphs (in Just Math) Rating: 5.00
Posted on 2021-08-16 by Jer (No Solution Yet, 16 Comments)
Difficulty: 2 of 5Seven (in Sequences) Rating: 5.00
Posted on 2021-08-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Factorials and 2 powers (in Just Math)
Posted on 2021-08-13 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Functional fiesta (in Just Math)
Posted on 2021-08-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A monthly puzzle (in Cryptography) Rating: 5.00
Posted on 2021-08-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A coprime couple (in Numbers) Rating: 4.00
Posted on 2021-08-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quarilateral vertex reflection (in Geometry)
Posted on 2021-08-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Indeed common (in Just Math)
Posted on 2021-08-03 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Many Heads part 2 (in Probability) Rating: 4.50
Posted on 2021-08-02 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cube trouble (in Just Math)
Posted on 2021-07-30 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Algebraic factors? (in Just Math)
Posted on 2021-07-28 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Triplet hunt (in Numbers)
Posted on 2021-07-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Good sequence (in Sequences) Rating: 3.50
Posted on 2021-07-26 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Words, words and words (in Word Problems) Rating: 5.00
Posted on 2021-07-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Four equal digits (in Numbers)
Posted on 2021-07-20 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 5 of 5Cyclic recursive summation (in Just Math)
Posted on 2021-07-16 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Adjacent Square Sum II (in Just Math) Rating: 5.00
Posted on 2021-07-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Irrational root shared (in Just Math)
Posted on 2021-07-14 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Unwinding a rope (in Calculus) Rating: 1.00
Posted on 2021-07-13 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Ones only (in Numbers)
Posted on 2021-07-12 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Solution in every interval? (in Just Math)
Posted on 2021-07-09 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Arithmetic inverse trigonometry (in Just Math)
Posted on 2021-07-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Special dates (in Science) Rating: 4.00
Posted on 2021-07-06 by Ady TZIDON (No Solution Yet, 44 Comments)
Difficulty: 3 of 5Prime pairs in power (in Numbers)
Posted on 2021-07-05 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Pascal's Lottery (in Probability) Rating: 4.00
Posted on 2021-07-01 by broll (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Reflection in Rectangle (in Just Math)
Posted on 2021-06-30 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Mid point and similarity (in Geometry)
Posted on 2021-06-25 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Distinct routes (in Numbers) Rating: 5.00
Posted on 2021-06-24 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Three random squares (in Just Math) Rating: 5.00
Posted on 2021-06-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Digit equivalence (in Just Math)
Posted on 2021-06-22 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Liar Logic 2 (in Liars and Knights) Rating: 4.00
Posted on 2021-06-21 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Mixed square (in Numbers)
Posted on 2021-06-18 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5The power of 37 (in Numbers)
Posted on 2021-06-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Prime count (in Numbers) Rating: 4.00
Posted on 2021-06-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Maximal product requested (in Just Math)
Posted on 2021-06-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5What is the last number? (in Numbers) Rating: 3.00
Posted on 2021-06-14 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Digit Sum Divisibility (in Numbers) Rating: 5.00
Posted on 2021-06-11 by tomarken (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Double negative (in Numbers) Rating: 5.00
Posted on 2021-06-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Leading divisibility (in Numbers)
Posted on 2021-06-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Multiply by 2 (in Just Math)
Posted on 2021-06-04 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Nine Pointed Sphere (in Shapes) Rating: 3.00
Posted on 2021-06-03 by Danish Ahmed Khan (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Let's play Bocce (in Probability) Rating: 5.00
Posted on 2021-06-02 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Rubik's Swap (in General) Rating: 4.00
Posted on 2021-06-01 by tomarken (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Linked List Deleted (in Algorithms)
Posted on 2021-05-31 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Gambler’s dilemma (in Probability) Rating: 3.00
Posted on 2021-05-28 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Four word classes (in Word Problems) Rating: 4.00
Posted on 2021-05-27 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Divisor divisibility (in Just Math)
Posted on 2021-05-26 by tomarken (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Eleven as mandatory divider (in Sequences)
Posted on 2021-05-24 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Good integer (in Numbers)
Posted on 2021-05-21 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5The Loopy Lunatic (in Science)
Posted on 2021-05-20 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Tricky function composition (in Just Math)
Posted on 2021-05-19 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hexagon area (in Just Math)
Posted on 2021-05-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Polynomial radicals (in Just Math)
Posted on 2021-05-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Positive divisor of positive divisor (in Numbers)
Posted on 2021-05-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Consecutive power sum (in Numbers)
Posted on 2021-05-12 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A Country, a City and a pamphlet (in Numbers) Rating: 4.00
Posted on 2021-05-11 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Ones or twos II (in Numbers) Rating: 4.00
Posted on 2021-05-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Five root function (in Just Math)
Posted on 2021-05-07 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Fibonacci Inequality (in Just Math) Rating: 4.00
Posted on 2021-05-06 by tomarken (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Pandigital powers 2 (in Numbers) Rating: 4.50
Posted on 2021-05-04 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Plus operator insertion (in Numbers) Rating: 3.00
Posted on 2021-05-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Locus amid two intersecting circles (in Geometry)
Posted on 2021-04-30 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Reverse and add in binary (in Numbers)
Posted on 2021-04-29 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Minimize parallelogram diagonal (in Geometry)
Posted on 2021-04-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5The incompatible food triad (in General)
Posted on 2021-04-27 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Recursive determinant replacement of quadratic (in Just Math)
Posted on 2021-04-23 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5colinear intersection points from a hexagon (in Geometry)
Posted on 2021-04-22 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Erased to a multiple of 7 (in Numbers)
Posted on 2021-04-21 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Common and tasty (in Word Problems) Rating: 5.00
Posted on 2021-04-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Find set cardinality (in Just Math)
Posted on 2021-04-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pigeonhole roots (in Just Math)
Posted on 2021-04-16 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prisoners and Coins (in Logic) Rating: 3.00
Posted on 2021-04-14 by tomarken (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Time to rhyme (in Numbers) Rating: 3.00
Posted on 2021-04-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Of equal area (in Geometry)
Posted on 2021-04-12 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Constrained circle in quadrilateral (in Just Math)
Posted on 2021-04-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Euphony (in Logic) Rating: 3.00
Posted on 2021-04-08 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Pandigital powers (in Numbers) Rating: 5.00
Posted on 2021-04-07 by Math Man (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Nearsighted rooks on a large chessboard (in Just Math) Rating: 3.00
Posted on 2021-04-05 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Quadratic inequality leading to sum of roots (in Just Math)
Posted on 2021-04-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Knight tour in an infinite board (in Just Math)
Posted on 2021-04-01 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 57.1.4 , my friend (in Numbers) Rating: 5.00
Posted on 2021-03-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Only in USA (in General) Rating: 5.00
Posted on 2021-03-29 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Max angle in triangle (in Geometry)
Posted on 2021-03-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Routes' routine (in Logic) Rating: 4.00
Posted on 2021-03-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Don't walk! (in General) Rating: 4.33
Posted on 2021-03-24 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 2 of 5Permuted quadratic equation (in Just Math)
Posted on 2021-03-23 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5With or without (in Numbers) Rating: 4.50
Posted on 2021-03-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Reduce to a lower degree (in Just Math)
Posted on 2021-03-19 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Induced divisibility (in Just Math)
Posted on 2021-03-18 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 52 Q&A (in Riddles) Rating: 4.00
Posted on 2021-03-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5The fibbons (in Numbers) Rating: 4.00
Posted on 2021-03-16 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Out of “Pillow Problems†(in Numbers) Rating: 4.00
Posted on 2021-03-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 53 roots of a biquadratic (in Just Math)
Posted on 2021-03-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cubic Minimum (in Numbers) Rating: 3.00
Posted on 2021-03-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5One excircle to another (in Geometry)
Posted on 2021-03-12 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A thin triangle (in Shapes) Rating: 3.00
Posted on 2021-03-11 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The replacement game (in Numbers)
Posted on 2021-03-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Words' insides (in Word Problems) Rating: 4.00
Posted on 2021-03-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Situational roots of a biquadratic (in Just Math)
Posted on 2021-03-07 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 1 of 5Defining a triangle. (in Geometry) Rating: 4.00
Posted on 2021-03-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Strictly monotonic (in Calculus)
Posted on 2021-03-05 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Numeric card game (in Just Math) Rating: 3.00
Posted on 2021-03-04 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Digit ending and divisibility (in Numbers)
Posted on 2021-03-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Job interview (in Logic) Rating: 3.00
Posted on 2021-03-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A drill to remember (in Geometry) Rating: 4.00
Posted on 2021-03-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Reciprocal Equation #6 (in Just Math)
Posted on 2021-02-28 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Binomial function hunt (in Just Math)
Posted on 2021-02-26 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Irregular Pentagram Problem (in Shapes)
Posted on 2021-02-24 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Circular Reasoning (in Probability)
Posted on 2021-02-23 by Kenny M (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Sport above all (in Just Math) Rating: 3.00
Posted on 2021-02-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Construction calculation (in Geometry)
Posted on 2021-02-21 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Differences of the fraction (in Just Math) Rating: 4.00
Posted on 2021-02-20 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5differentiability in functions (in Calculus)
Posted on 2021-02-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Trapezium in polygon (in Numbers) Rating: 3.00
Posted on 2021-02-18 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Integer sides of cuboid (in Numbers) Rating: 3.00
Posted on 2021-02-17 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Tom and Jerry (in Logic) Rating: 5.00
Posted on 2021-02-16 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Less than 100 (in Numbers) Rating: 4.00
Posted on 2021-02-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Squares concatenated to square (in Numbers) Rating: 3.00
Posted on 2021-02-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Solve in naturals (in Numbers)
Posted on 2021-02-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5As close as possible (in Numbers) Rating: 3.00
Posted on 2021-02-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Polygon angle summation (in Geometry)
Posted on 2021-02-10 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5As time goes by (in Sequences) Rating: 2.33
Posted on 2021-02-09 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Mission 55 (in Numbers) Rating: 4.00
Posted on 2021-02-08 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Powered to perfect (in Numbers) Rating: 3.67
Posted on 2021-02-07 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5The nearness of you (in Logic) Rating: 3.00
Posted on 2021-02-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Triple composition on naturals (in Just Math) Rating: 1.00
Posted on 2021-02-05 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Provide dimensions (in Geometry) Rating: 2.50
Posted on 2021-02-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Perpendicular edge of tetrahedron (in Geometry)
Posted on 2021-02-02 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Isosceles split (in Geometry)
Posted on 2021-02-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Polygon mesh with a point (in Geometry)
Posted on 2021-01-31 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5374 1493 I9 243 35 85M4 (in Just Math) Rating: 5.00
Posted on 2021-01-30 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Entries of a matrix (in Just Math) Rating: 4.00
Posted on 2021-01-29 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5mini equilateral over mega equilateral (in Just Math)
Posted on 2021-01-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Three circles on sphere (in Just Math)
Posted on 2021-01-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Never consecutive (in Probability) Rating: 4.00
Posted on 2021-01-26 by Jer (No Solution Yet, 7 Comments)
Difficulty: 2 of 533rd Powers (in Numbers) Rating: 3.00
Posted on 2021-01-25 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5An increasing function equation (in Calculus) Rating: 3.00
Posted on 2021-01-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sort them out (in Word Problems)
Posted on 2021-01-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 53D geometry (in Shapes) Rating: 1.00
Posted on 2021-01-22 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Giant divisibility (in Just Math)
Posted on 2021-01-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Complex hexagon ratios (in Just Math)
Posted on 2021-01-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sweet little sixteen (in Just Math)
Posted on 2021-01-18 by broll (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Colinearity with rectangle vertex (in Geometry)
Posted on 2021-01-17 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 53 to 6 letters (in Word Problems) Rating: 4.00
Posted on 2021-01-16 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Reverse engineering (in Tricks) Rating: 3.00
Posted on 2021-01-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Literary apparel (in Word Problems) Rating: 5.00
Posted on 2021-01-14 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 4 of 5number sum equals all digit sum (in Numbers)
Posted on 2021-01-13 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Solitaire: Probability Of No First Move (in Probability)
Posted on 2021-01-12 by Larry (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Lattices inside square (in Just Math)
Posted on 2021-01-10 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Go one, two, three (in Numbers) Rating: 3.00
Posted on 2021-01-09 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 51 2 4 8 (in General) Rating: 5.00
Posted on 2021-01-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Rhombus and equilateral triangles (in Geometry) Rating: 2.00
Posted on 2021-01-06 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Image 3D (in Geometry)
Posted on 2021-01-05 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Trunk numbers (in Just Math) Rating: 3.00
Posted on 2021-01-04 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Go form square (in Numbers) Rating: 2.00
Posted on 2021-01-03 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Go do modulus (in Numbers) Rating: 4.00
Posted on 2021-01-02 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The money winning strategy (in Just Math) Rating: 3.00
Posted on 2021-01-01 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Welcome, 2021 (in Cryptography) Rating: 3.00
Posted on 2020-12-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Rectangular blocks (in Just Math)
Posted on 2020-12-30 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Solve simultaneous with linear and quintic (in Numbers) Rating: 3.00
Posted on 2020-12-29 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Express as product of quadratic (in Just Math) Rating: 3.00
Posted on 2020-12-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Giant sum of products (in Numbers)
Posted on 2020-12-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5On the angle bisector (in Geometry)
Posted on 2020-12-25 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Concyclic in a triangle (in Geometry)
Posted on 2020-12-24 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 1 of 5Measure angle in parallelogram (in Geometry)
Posted on 2020-12-23 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Functional Equation (in Just Math)
Posted on 2020-12-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Circular segments (in Just Math)
Posted on 2020-12-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Conditional pairs (in Just Math)
Posted on 2020-12-19 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Number play (in Numbers) Rating: 4.50
Posted on 2020-12-18 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Circular area minimized (in Calculus)
Posted on 2020-12-17 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Perpendiculars in cyclic quadrilateral (in Geometry)
Posted on 2020-12-16 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Functional inequality (in Just Math)
Posted on 2020-12-15 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Box and cube rooted (in Numbers)
Posted on 2020-12-14 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 53 and 3 and... (in Numbers) Rating: 3.00
Posted on 2020-12-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Snails journey (in Just Math)
Posted on 2020-12-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sin sum (in Just Math)
Posted on 2020-12-11 by Jer (No Solution Yet, 14 Comments)
Difficulty: 3 of 52020 roots (in Just Math)
Posted on 2020-12-10 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Complete number (in Numbers)
Posted on 2020-12-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Quick triangle side (in Geometry)
Posted on 2020-12-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tic tac toe points (in Just Math)
Posted on 2020-12-07 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Equation in integers (in Numbers) Rating: 3.00
Posted on 2020-12-06 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Functional practice (in Just Math)
Posted on 2020-12-05 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Possible diquadratic (in Just Math)
Posted on 2020-12-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Shortest way to a million (in Numbers) Rating: 4.50
Posted on 2020-12-03 by Ady TZIDON (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Missing side of hexagon (in Geometry) Rating: 2.00
Posted on 2020-12-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Concatenation equals Sum of Squares (in Numbers)
Posted on 2020-12-01 by Larry (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Permuted sums (in Just Math) Rating: 3.00
Posted on 2020-11-30 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Weird shuffling (in Just Math)
Posted on 2020-11-29 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 2 of 52 absent digits (in Numbers) Rating: 2.00
Posted on 2020-11-28 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Find the third side (in Geometry)
Posted on 2020-11-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Lcm equation (in Numbers)
Posted on 2020-11-26 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Maximal of a function (in Calculus)
Posted on 2020-11-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Rubik's cut (in Just Math) Rating: 2.00
Posted on 2020-11-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Calculator at rescue? (in Just Math)
Posted on 2020-11-23 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Locus to trisect the triangle (in Just Math) Rating: 3.00
Posted on 2020-11-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Go Discriminant! (in Just Math)
Posted on 2020-11-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quad in quad (in Geometry)
Posted on 2020-11-20 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Radicals inside box (in Numbers)
Posted on 2020-11-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Microscopically small (in Numbers)
Posted on 2020-11-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Naoish numbers (in Numbers) Rating: 2.00
Posted on 2020-11-16 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Go left of the number (in Numbers) Rating: 3.00
Posted on 2020-11-15 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Exponentiation Equals Concatenation (in Numbers) Rating: 3.00
Posted on 2020-11-14 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Dive deep after the decimal point (in Numbers)
Posted on 2020-11-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fit the middle digit (in Numbers) Rating: 3.00
Posted on 2020-11-12 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Trifecta circles (in Numbers)
Posted on 2020-11-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Making it cubic (in Numbers)
Posted on 2020-11-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Clock a doodle do (in Just Math)
Posted on 2020-11-09 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Rectangular puzzle (in Just Math)
Posted on 2020-11-08 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Quadratic integer root (in Just Math)
Posted on 2020-11-07 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Count real roots (in Just Math) Rating: 3.00
Posted on 2020-11-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Neighboring Countries (in Word Problems)
Posted on 2020-11-05 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Polynomial practice 2 (in Just Math)
Posted on 2020-11-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A triangle locus (in Geometry)
Posted on 2020-11-03 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Cubic coefficients (in Just Math) Rating: 3.00
Posted on 2020-11-02 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Coldest point in coordinate (in Just Math) Rating: 3.00
Posted on 2020-11-01 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Chinese remainder to the rescue (in Just Math) Rating: 3.00
Posted on 2020-10-31 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Polynomial practice (in Just Math) Rating: 3.00
Posted on 2020-10-30 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Construction inside parallelogram (in Geometry)
Posted on 2020-10-29 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Sequence number compressed (in Just Math) Rating: 5.00
Posted on 2020-10-28 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Money giveaway (in Numbers) Rating: 3.50
Posted on 2020-10-26 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Trailing zeros (in Numbers)
Posted on 2020-10-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Functional equation leads to another (in Just Math)
Posted on 2020-10-24 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Heron at rescue (in Just Math)
Posted on 2020-10-23 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Quadratic relation (in Just Math) Rating: 2.00
Posted on 2020-10-21 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Quick divisibility (in Numbers) Rating: 5.00
Posted on 2020-10-20 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Triangle bisector (in Geometry)
Posted on 2020-10-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Functional feast (in Just Math) Rating: 3.50
Posted on 2020-10-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Valid system of equations (in Just Math) Rating: 3.00
Posted on 2020-10-16 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Concatenation of Prime Factors is Pandigital (in Numbers)
Posted on 2020-10-15 by Larry (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Product of 3 boxes (in Numbers)
Posted on 2020-10-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find the pairs (in Numbers)
Posted on 2020-10-13 by Danish Ahmed Khan (No Solution Yet, 22 Comments)
Difficulty: 1 of 5Quick quadratic (in Numbers)
Posted on 2020-10-12 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Real equation (in Just Math)
Posted on 2020-10-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The angle bisectors (in Geometry)
Posted on 2020-10-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pentagon rays (in General)
Posted on 2020-10-09 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Pages and Squires 2 (in Liars and Knights)
Posted on 2020-10-08 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 2 of 5All odd digit (in Numbers)
Posted on 2020-10-05 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Triplets cubed (in Numbers)
Posted on 2020-10-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 55 token coverage (in Logic) Rating: 3.00
Posted on 2020-10-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Prime equation 2 (in Numbers)
Posted on 2020-10-01 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Dissecting into rectangles (in Numbers)
Posted on 2020-09-30 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Just an Average sequence (in Sequences)
Posted on 2020-09-29 by Larry (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A square pattern? (in Numbers) Rating: 3.00
Posted on 2020-09-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5What follows? (in Sequences)
Posted on 2020-09-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Previously divisible (in Numbers)
Posted on 2020-09-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Extreme inequality (in Just Math) Rating: 5.00
Posted on 2020-09-23 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Must be prime (in Sequences)
Posted on 2020-09-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No fractions (in Just Math) Rating: 4.00
Posted on 2020-09-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Two slopes out of three (in Calculus) Rating: 5.00
Posted on 2020-09-18 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Tetrahedral angles (in Shapes)
Posted on 2020-09-17 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5An Iterated Floor Equation (in Numbers)
Posted on 2020-09-15 by Brian Smith (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Close neighbor (in General) Rating: 3.00
Posted on 2020-09-14 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Polynomial path (in Numbers)
Posted on 2020-09-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Square to Cone Conversion (in Shapes)
Posted on 2020-09-12 by Larry (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Halved triangle (in Just Math) Rating: 4.00
Posted on 2020-09-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 550 - or more (in Numbers)
Posted on 2020-09-10 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Repeating squares (in Just Math)
Posted on 2020-09-09 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Sphere parts (in Shapes)
Posted on 2020-09-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Equilateral hexagon (in Geometry)
Posted on 2020-09-08 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 52 related tasks (in Numbers)
Posted on 2020-09-07 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Cities, Countries and Colors (in Word Problems) Rating: 4.00
Posted on 2020-09-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5WG’s unique number (in Numbers) Rating: 3.50
Posted on 2020-09-04 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 4 of 5A peculiar function! (in Just Math)
Posted on 2020-09-03 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Permuted average (in Numbers)
Posted on 2020-09-01 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5From factorial to power (in Just Math)
Posted on 2020-08-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Extreme revolving cuboid (in Shapes) Rating: 2.00
Posted on 2020-08-28 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Make five (in Word Problems)
Posted on 2020-08-27 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Now, before and later (in Numbers)
Posted on 2020-08-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Square Reciprocal Summation (in Just Math) Rating: 3.00
Posted on 2020-08-25 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Check this sequence (in Sequences)
Posted on 2020-08-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Location, location (in Just Math) Rating: 1.00
Posted on 2020-08-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Average Of Digits of powers (in Numbers) Rating: 3.00
Posted on 2020-08-20 by Larry (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Ask and solve cubes (in Numbers)
Posted on 2020-08-17 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Let's party (in Numbers) Rating: 5.00
Posted on 2020-08-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Cosine cups (in Shapes)
Posted on 2020-08-07 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Three Digit Number 3 (in Numbers)
Posted on 2020-08-05 by Larry (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Erase a prime (in Numbers) Rating: 3.00
Posted on 2020-08-03 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5For all the tea in China (in Numbers)
Posted on 2020-07-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Accelerating Sequence (in Sequences)
Posted on 2020-07-24 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Elementary nationality (in Tricks) Rating: 5.00
Posted on 2020-07-22 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two Sums of Two Squares (in Numbers) Rating: 4.50
Posted on 2020-07-17 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 57 matches (in Word Problems) Rating: 3.00
Posted on 2020-07-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 57 hypotenuses (in Numbers)
Posted on 2020-07-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Four generations (in Numbers) Rating: 3.00
Posted on 2020-07-06 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Average other (in Numbers) Rating: 4.00
Posted on 2020-07-01 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Function range (in Just Math)
Posted on 2020-06-29 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Best quotient (in Word Problems) Rating: 3.00
Posted on 2020-06-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fewer than 4 cubes (in Numbers)
Posted on 2020-06-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Find Five (in Word Problems) Rating: 4.00
Posted on 2020-06-17 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Great Divide (in Just Math)
Posted on 2020-06-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Tilted drum (in Shapes)
Posted on 2020-06-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Fibo's common divider (in Sequences) Rating: 3.00
Posted on 2020-06-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Can you do it? (in Games)
Posted on 2020-06-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Word word (in General) Rating: 4.33
Posted on 2020-06-05 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Eight of them (in Numbers)
Posted on 2020-06-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Math in letters (in Just Math) Rating: 4.00
Posted on 2020-06-01 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Cube hunting (in Numbers)
Posted on 2020-05-29 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Two Towers Hanoi (in Algorithms) Rating: 3.00
Posted on 2020-05-27 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Deja vu (in Sequences) Rating: 5.00
Posted on 2020-05-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Euler and the Modern Army (in Games) Rating: 4.50
Posted on 2020-05-22 by broll (No Solution Yet, 8 Comments)
Difficulty: 2 of 5A six-digit answer (in Just Math) Rating: 4.00
Posted on 2020-05-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5More functions to limit (in Just Math)
Posted on 2020-05-18 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Almost a half (in Just Math)
Posted on 2020-05-15 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 52 subsets (in Numbers)
Posted on 2020-05-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5What is unsolved? (in Numbers)
Posted on 2020-05-11 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Radius and Altitudes (in Geometry)
Posted on 2020-05-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5An envelope of line family (in Geometry)
Posted on 2020-05-06 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Luck beats theory (in Probability)
Posted on 2020-05-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Pokemon Puzzle (in Word Problems) Rating: 4.00
Posted on 2020-05-01 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What do you know? (in Numbers)
Posted on 2020-04-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5WG's portfolio (in Just Math)
Posted on 2020-04-27 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Confirm or negate (in Just Math) Rating: 5.00
Posted on 2020-04-24 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Algebra busters (in Numbers) Rating: 4.00
Posted on 2020-04-22 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Letters in a letter (in Word Problems) Rating: 5.00
Posted on 2020-04-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5PYHIYP #6 (in Logic) Rating: 3.67
Posted on 2020-04-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Square and triangle in a circle (in Geometry) Rating: 2.00
Posted on 2020-04-13 by Jer (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Select the right subset (in Word Problems)
Posted on 2020-04-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Monotonic Function Decomposition (in Calculus)
Posted on 2020-04-08 by JLo (No Solution Yet, 1 Comments)
Difficulty: 3 of 5hexagons inside hexagon (in Geometry) Rating: 1.00
Posted on 2020-04-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Define my profile (in General) Rating: 4.00
Posted on 2020-04-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Go away ! (in Numbers)
Posted on 2020-03-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Spacy Colors III (in Just Math)
Posted on 2020-03-27 by JLo (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Division by e (in Just Math) Rating: 5.00
Posted on 2020-03-25 by Danish Ahmed Khan (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Super Symmetry (in Just Math)
Posted on 2020-03-23 by JLo (No Solution Yet, 1 Comments)
Difficulty: 2 of 5p(Ascending Number) closest to .01 (in Probability)
Posted on 2020-03-16 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5co-prime unit fractions (in Numbers)
Posted on 2020-03-06 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5The Celebrated Jumping Frog of Perplexus County (in Probability)
Posted on 2020-03-04 by Larry (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Brush up your Latin ! (in Word Problems)
Posted on 2020-03-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5PYHIYP #5 Seven up! (in Sequences) Rating: 2.00
Posted on 2020-02-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Coded Crossword 3 (in Cryptography) Rating: 4.50
Posted on 2020-02-21 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A special equation (in Just Math)
Posted on 2020-02-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Got a hint? (in Sequences) Rating: 2.50
Posted on 2020-02-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Elections in Graphistan (in General) Rating: 3.50
Posted on 2020-02-14 by JLo (No Solution Yet, 5 Comments)
Difficulty: 2 of 5PYHIYP #3: 8 given, 1 missing (in Logic) Rating: 3.50
Posted on 2020-02-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Pythagorean Reciprocals (in Geometry) Rating: 2.00
Posted on 2020-02-05 by Brian Smith (No Solution Yet, 14 Comments)
Difficulty: 4 of 5The Smashing Pumpkins (in General) Rating: 1.00
Posted on 2020-01-31 by JLo (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Insert A B & C (in Word Problems)
Posted on 2020-01-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reflection Triangle (in Shapes) Rating: 3.50
Posted on 2020-01-24 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Certain old trade (in General) Rating: 3.00
Posted on 2020-01-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 53 circles in an isosceles trapezoid (in Geometry)
Posted on 2020-01-10 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Equal angles within a right triangle (in Geometry)
Posted on 2020-01-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Phrase and misconception (in Cryptography) Rating: 3.00
Posted on 2020-01-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Maximal Rectangle (in Shapes)
Posted on 2019-12-30 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Heptagonal Triangle (in Shapes) Rating: 3.00
Posted on 2019-12-27 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 513 L2L (in Word Problems)
Posted on 2019-12-25 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Three Squares make a Triangle (in Shapes) Rating: 3.00
Posted on 2019-12-23 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Company Conundrum 2 (in Word Problems) Rating: 5.00
Posted on 2019-12-20 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Poetry, not poverty (in Just Math)
Posted on 2019-12-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The cute substitution (in Calculus)
Posted on 2019-12-13 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5PYHIYP #1 (in Numbers) Rating: 4.50
Posted on 2019-12-09 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Reflection coincides with the center (in Geometry) Rating: 3.50
Posted on 2019-12-06 by Danish Ahmed Khan (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Nobody's Perfect (in Just Math) Rating: 4.00
Posted on 2019-12-04 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Follow the function (in Just Math)
Posted on 2019-11-28 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5NARROW + STREET = AVENUE (in Numbers) Rating: 4.33
Posted on 2019-11-27 by Larry (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Can we use Pigeonhole? (in Numbers) Rating: 4.00
Posted on 2019-11-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Spherplex (in Just Math)
Posted on 2019-11-25 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The top degree (in Just Math)
Posted on 2019-11-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Very Large Triangles (in Just Math)
Posted on 2019-11-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The Big Division (in Numbers)
Posted on 2019-11-18 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 5 of 5Balancing Hemispheres (in Science)
Posted on 2019-11-15 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Thrice -----es ... (in Word Problems)
Posted on 2019-11-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Factor distribution in a school (in Numbers) Rating: 1.00
Posted on 2019-11-13 by Danish Ahmed Khan (No Solution Yet, 15 Comments)
Difficulty: 3 of 5The Weight Obsessed Islander (in Weights and Scales)
Posted on 2019-11-12 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Congruency in calculus (in Calculus) Rating: 3.00
Posted on 2019-11-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5An old egg problem (in Numbers)
Posted on 2019-11-05 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Tricky sequence (in Sequences) Rating: 5.00
Posted on 2019-11-04 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A positive rational function (in Just Math)
Posted on 2019-11-01 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Medium numbers (in Numbers)
Posted on 2019-10-31 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two methods (in Word Problems)
Posted on 2019-10-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Fancy quadrilateral (in Just Math)
Posted on 2019-10-25 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Quadratic with Primes (in Numbers)
Posted on 2019-10-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cube rooted till 2019 (in Just Math)
Posted on 2019-10-23 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Ardent tennis player (in Just Math)
Posted on 2019-10-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Interval Guessing (in General) Rating: 5.00
Posted on 2019-10-21 by Brian Smith (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Some Sum of Some Sum (in Numbers)
Posted on 2019-10-18 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5It's not a Magic Square (in Numbers)
Posted on 2019-10-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Non-trivial solutions (in Sequences) Rating: 5.00
Posted on 2019-10-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5The digit is missing! (in Numbers)
Posted on 2019-10-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5The Midpoint Locus (in General) Rating: 5.00
Posted on 2019-10-11 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Tricky sums indeed! (in Numbers)
Posted on 2019-10-10 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The middle number (in Probability) Rating: 4.00
Posted on 2019-10-08 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5From incircle to vertices (in Just Math)
Posted on 2019-10-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Solving triangles (in Just Math)
Posted on 2019-10-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangle rotation (in Shapes)
Posted on 2019-10-02 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Cotangents product (in Just Math)
Posted on 2019-09-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Minimize the chord length (in Just Math)
Posted on 2019-09-27 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 55 given, 4 missing (in Numbers)
Posted on 2019-09-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The three Sprinters (in Just Math)
Posted on 2019-09-25 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Hexagonal interior point (in Geometry)
Posted on 2019-09-24 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Timothy and Elizabeth (in Liars and Knights) Rating: 2.50
Posted on 2019-09-23 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Is it an Ellipse? (in Geometry)
Posted on 2019-09-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Area of central locus (in Shapes)
Posted on 2019-09-19 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Locate the Locus (in Shapes)
Posted on 2019-09-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Just substitute? (in Numbers) Rating: 3.00
Posted on 2019-09-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Spherical displacement of water (in Shapes) Rating: 3.00
Posted on 2019-09-13 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Hexagonal Spider Web (in Probability)
Posted on 2019-09-12 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A matter of perspective (in Shapes)
Posted on 2019-09-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Jeopardy style IV (in Word Problems)
Posted on 2019-09-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5One way out (in Just Math)
Posted on 2019-09-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 55 circles in a square part 2 (in Geometry)
Posted on 2019-09-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Inellipse (in Shapes)
Posted on 2019-09-07 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Reduced to single digit (in Numbers) Rating: 3.00
Posted on 2019-09-06 by Danish Ahmed Khan (No Solution Yet, 14 Comments)
Difficulty: 2 of 5Fibonacci tail (in Numbers) Rating: 3.00
Posted on 2019-09-05 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 514 * A to T (in Word Problems)
Posted on 2019-09-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Beautiful recursion (in Just Math)
Posted on 2019-09-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Memphis, Tennessee (in Word Problems) Rating: 5.00
Posted on 2019-09-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Don't assume you know this concave pentagon (in Geometry) Rating: 5.00
Posted on 2019-09-01 by Brian Smith (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Parabola Axis Construction (in Geometry)
Posted on 2019-08-31 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Bored student (in Just Math) Rating: 5.00
Posted on 2019-08-30 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Money in the word (in Word Problems) Rating: 5.00
Posted on 2019-08-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 55 circles in a square part 1 (in Geometry)
Posted on 2019-08-28 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Order in triangular array (in Probability) Rating: 3.00
Posted on 2019-08-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Five Touching Spheres (in Shapes) Rating: 5.00
Posted on 2019-08-25 by Danish Ahmed Khan (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Talwalker trouble (in Geometry)
Posted on 2019-08-24 by broll (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Summing the product of digits (in Numbers) Rating: 3.00
Posted on 2019-08-23 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Rotated Checkerboard (in Just Math)
Posted on 2019-08-22 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Triangle in a Square (in Geometry)
Posted on 2019-08-21 by Brian Smith (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Yahtzee (in Probability) Rating: 3.00
Posted on 2019-08-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Irrational Distance/Rational Areas (in Just Math)
Posted on 2019-08-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Rectangular Regions (in Just Math) Rating: 3.00
Posted on 2019-08-18 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The Post Problem (in Shapes)
Posted on 2019-08-17 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Constructed incenter (in Geometry)
Posted on 2019-08-16 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Recursive reaches one million (in Numbers)
Posted on 2019-08-15 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Digitally Average Integers (in Numbers)
Posted on 2019-08-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sitting rearrangement (in Just Math)
Posted on 2019-08-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Peoples Day (in Just Math)
Posted on 2019-08-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5No primes 3 (in Numbers) Rating: 5.00
Posted on 2019-08-10 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Squared average equals square (in Numbers)
Posted on 2019-08-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Mysterious Multiplication (in Numbers) Rating: 1.00
Posted on 2019-08-07 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5One or more? (in Word Problems)
Posted on 2019-08-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5points or pigeons in square? (in Just Math)
Posted on 2019-08-05 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The SPA numbers (in Numbers)
Posted on 2019-08-04 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Digital computing (in Numbers) Rating: 4.50
Posted on 2019-08-03 by Danish Ahmed Khan (No Solution Yet, 25 Comments)
Difficulty: 3 of 5444...444 (in Numbers)
Posted on 2019-08-02 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 4 of 5High speed horses (in Weights and Scales)
Posted on 2019-08-01 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Height of a Mountain (in Just Math)
Posted on 2019-07-31 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Listing the cardinal numbers’ names (in Word Problems)
Posted on 2019-07-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Gifts exchanged (in Logic) Rating: 2.00
Posted on 2019-07-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rods as triangle sides (in Just Math)
Posted on 2019-07-28 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Pairs of primes (in Probability)
Posted on 2019-07-27 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Tangent by Transformation (in Just Math)
Posted on 2019-07-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bugs on a pentagon (in Just Math)
Posted on 2019-07-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Conversion Diversion (in Just Math)
Posted on 2019-07-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Tic tac toe variation (in Logic)
Posted on 2019-07-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5All that remainder is Gold (in Numbers)
Posted on 2019-07-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5How do I know the time? (in Just Math)
Posted on 2019-07-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Keep an eye Onto the other (in Just Math)
Posted on 2019-07-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Api ece mea lpu zzl eto dec ode (in Cryptography)
Posted on 2019-07-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Approximate value (in Numbers)
Posted on 2019-07-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Quick integral (in Calculus) Rating: 2.00
Posted on 2019-07-16 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Maximum end point value (in Calculus)
Posted on 2019-07-15 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Transformation to nonnegitivity (in Just Math) Rating: 4.00
Posted on 2019-07-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Describe the decimal (in Numbers)
Posted on 2019-07-12 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Root switching sides (in Just Math)
Posted on 2019-07-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5In pairs (in Just Math)
Posted on 2019-07-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Hexagonally closer (in Just Math)
Posted on 2019-07-07 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Functional Logic (in Just Math)
Posted on 2019-07-06 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Down the hill (in Science)
Posted on 2019-07-05 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Quadruple fraction sum (in Numbers)
Posted on 2019-06-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Humongous Factorial Divisiblity (in Numbers)
Posted on 2019-06-29 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Triple cube sum (in Numbers)
Posted on 2019-06-28 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quick factors III (in Numbers)
Posted on 2019-06-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5(7x7-1) = 2(5x5-1) (in Shapes) Rating: 5.00
Posted on 2019-06-25 by Jer (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Zero Error Scales (in Just Math)
Posted on 2019-06-24 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quick factors II (in Numbers)
Posted on 2019-06-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Differentiated function (in Calculus)
Posted on 2019-06-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 5 of 5From One North Pole to the Other (in Science)
Posted on 2019-06-21 by Danish Ahmed Khan (No Solution Yet, 21 Comments)
Difficulty: 3 of 5cosine rationality (in Just Math)
Posted on 2019-06-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 537 is too special (in Numbers) Rating: 2.00
Posted on 2019-06-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cryptajoke XIX (in Word Problems)
Posted on 2019-06-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5How many geeks are smart? (in Just Math)
Posted on 2019-06-17 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Be the term-inator (in Just Math)
Posted on 2019-06-16 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Just Hangin' around (in Just Math) Rating: 5.00
Posted on 2019-06-14 by Danish Ahmed Khan (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Find the rainbow (in Probability)
Posted on 2019-06-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Primes and Semiprimes (in Numbers)
Posted on 2019-06-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5The Real Product (in General)
Posted on 2019-06-11 by Danish Ahmed Khan (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Catching flak thrice (in Word Problems)
Posted on 2019-06-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 5 of 5Zig Zag Nonagon (in Shapes)
Posted on 2019-06-09 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Shooting submarine on a number line! (in Just Math) Rating: 5.00
Posted on 2019-06-08 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5A Real function (in Just Math)
Posted on 2019-06-07 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Pouring water (in Shapes)
Posted on 2019-06-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Number dilemma (in Numbers) Rating: 4.00
Posted on 2019-06-05 by Danish Ahmed Khan (No Solution Yet, 19 Comments)
Difficulty: 3 of 5Tangent of string of 5 (in Just Math)
Posted on 2019-06-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Oned square root (in Numbers)
Posted on 2019-06-03 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Odd digited square (in Numbers)
Posted on 2019-06-02 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Weird Expression (in Just Math)
Posted on 2019-06-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Cubes can do all (in Numbers)
Posted on 2019-05-31 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 5 of 5Ultimate Tic-Tac-Toe (in Just Math)
Posted on 2019-05-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sliced sphere (in Shapes)
Posted on 2019-05-29 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Who's on the 4th base? (in Numbers)
Posted on 2019-05-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Unknown Triangle (in Just Math)
Posted on 2019-05-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Matrix Differentiated (in Just Math)
Posted on 2019-05-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5J.H. Lambert, I presume ? (in Just Math)
Posted on 2019-05-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Permuted a, b, c, d equation (in Just Math)
Posted on 2019-05-23 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5The Bug Climber (in Just Math)
Posted on 2019-05-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Soft car for cats (in Numbers)
Posted on 2019-05-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Squarely chained (in Numbers)
Posted on 2019-05-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 5 of 5Crossword puzzles (in Algorithms) Rating: 5.00
Posted on 2019-05-21 by Math Man (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Carry on, Decimal (in Numbers)
Posted on 2019-05-20 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Rainy days on a mountain (in Just Math)
Posted on 2019-05-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Little Pika can barely add (in Numbers) Rating: 3.00
Posted on 2019-05-19 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Evened N and 3N (in Numbers)
Posted on 2019-05-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Calculator can't handle it (in Numbers)
Posted on 2019-05-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Integers involved in factors (in Numbers)
Posted on 2019-05-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Four at a time (in Numbers)
Posted on 2019-05-16 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Marks on Marks off (in Numbers)
Posted on 2019-05-15 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Concatenation sum (in Numbers) Rating: 2.00
Posted on 2019-05-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5The road less travelled (in Just Math)
Posted on 2019-05-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Solver's choices (in Numbers)
Posted on 2019-05-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Chemical deduction (in Logic) Rating: 5.00
Posted on 2019-05-13 by Danish Ahmed Khan (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Polynomial collections! (in Just Math)
Posted on 2019-05-11 by Danish Ahmed Khan (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Three Orthogonal Chords (in Geometry)
Posted on 2019-05-10 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5No copying, students (in Probability)
Posted on 2019-05-10 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Integer coordinates (in Numbers)
Posted on 2019-05-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Odd partition (in Numbers)
Posted on 2019-05-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A hairy problem (in Just Math)
Posted on 2019-05-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Summed LCM (in Numbers)
Posted on 2019-05-08 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Damaged calculator (in Numbers)
Posted on 2019-05-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Cosmological Logic (in Logic)
Posted on 2019-05-07 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Double Composition (in Just Math)
Posted on 2019-05-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A geometric gangster shooting (in Just Math) Rating: 4.00
Posted on 2019-05-06 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Sections in parallelogram (in Geometry)
Posted on 2019-05-05 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Diagonal mystery (in Geometry)
Posted on 2019-05-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Paired number GCD and LCM (in Numbers)
Posted on 2019-05-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Single, Double & Triple Scoops (in Just Math)
Posted on 2019-05-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The right time (in Just Math)
Posted on 2019-05-02 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The powers and the exponent (in Calculus)
Posted on 2019-05-01 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Missing letter (in Logic)
Posted on 2019-05-01 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 1 of 5The special ones among the group (in Numbers)
Posted on 2019-04-30 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 59-ending numbers (in Numbers)
Posted on 2019-04-29 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 537 and 0s (in Numbers)
Posted on 2019-04-29 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Rectangle pegs in a round hole (in Just Math)
Posted on 2019-04-28 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Trirectangular Corner Locus (in Shapes)
Posted on 2019-04-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inequality in lengths of pentagon (in Just Math)
Posted on 2019-04-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Bit filling in 5*5 grid! (in Just Math)
Posted on 2019-04-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Arithmetic prime (in Numbers)
Posted on 2019-04-25 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5He stole my ball! (in Probability)
Posted on 2019-04-24 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 2 of 5How many qualified numbers? (in Numbers)
Posted on 2019-04-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Based upon a secret (in Sequences)
Posted on 2019-04-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Seven positive numbers (in Numbers)
Posted on 2019-04-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Constructed length ratio (in Geometry)
Posted on 2019-04-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Distinct figures of Circle and Triangle (in Geometry)
Posted on 2019-04-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Factor hints II (in Numbers)
Posted on 2019-04-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Know the functioning of the function? (in Just Math)
Posted on 2019-04-19 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5A Jewish dilemma (in Word Problems)
Posted on 2019-04-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Factor hints (in Numbers)
Posted on 2019-04-18 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Simple Adding (in Numbers)
Posted on 2019-04-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Looks like Cauchy (in Just Math)
Posted on 2019-04-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Breaking the Jewel code (in Numbers) Rating: 5.00
Posted on 2019-04-17 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Family ages (in Numbers)
Posted on 2019-04-16 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Tunneling through a mine car (in Just Math)
Posted on 2019-04-16 by Danish Ahmed Khan (No Solution Yet, 25 Comments)
Difficulty: 3 of 52000 9s (in Numbers)
Posted on 2019-04-15 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Number Donuts (in Logic)
Posted on 2019-04-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Polynomial phobia abandoned! (in Just Math)
Posted on 2019-04-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5The midpoint of Tangency (in Geometry)
Posted on 2019-04-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Finding Quadratic (in Just Math)
Posted on 2019-04-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 54 and 5 powered (in Numbers)
Posted on 2019-04-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The number n in n^2 (in Numbers)
Posted on 2019-04-11 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Does the hexagon exist? (in Geometry)
Posted on 2019-04-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Not more than one (in Just Math)
Posted on 2019-04-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Based on threes! (in Numbers)
Posted on 2019-04-09 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Matrixed Fibonacci (in Just Math)
Posted on 2019-04-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Some reciprocal summed (in Numbers)
Posted on 2019-04-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 5 of 5The devilish 9 roots (in Just Math)
Posted on 2019-04-06 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Imagine the world (in Shapes)
Posted on 2019-04-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Mobile screen under Sunlight (in Science)
Posted on 2019-04-05 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Hot and Cold Cubes (in Science)
Posted on 2019-04-04 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Asymmetrical String (in Numbers)
Posted on 2019-04-04 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hy-Spherical (in Shapes)
Posted on 2019-04-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sine in Exponent (in Just Math)
Posted on 2019-04-03 by Danish Ahmed Khan (No Solution Yet, 17 Comments)
Difficulty: 1 of 5Hexagon Angles Needed (in Shapes)
Posted on 2019-04-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Taramasalata inspired world (in Word Problems) Rating: 4.50
Posted on 2019-04-01 by Ady TZIDON (No Solution Yet, 21 Comments)
Difficulty: 1 of 5The next 0, 1, 2 (in Sequences)
Posted on 2019-04-01 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 56 is easy - 5 & 7 not quite ! (in Numbers) Rating: 3.00
Posted on 2019-03-31 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Vertices to incircle (in Shapes)
Posted on 2019-03-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5More Discs in a Triangle (in Geometry)
Posted on 2019-03-29 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Radical Factorials (in Just Math)
Posted on 2019-03-29 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Closer to your roots (in Just Math)
Posted on 2019-03-28 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Calculus in the interval (in Calculus)
Posted on 2019-03-28 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5A Divisor Diversion (in Numbers) Rating: 5.00
Posted on 2019-03-27 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Locate the inflection point (in Just Math)
Posted on 2019-03-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Divisor in between (in Numbers)
Posted on 2019-03-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Larger Square (in Numbers)
Posted on 2019-03-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Matrix rank? (in Just Math)
Posted on 2019-03-24 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mean=Median=Mode (in Just Math) Rating: 3.00
Posted on 2019-03-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Cubic transformation (in Just Math)
Posted on 2019-03-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Too many to work with (in Geometry)
Posted on 2019-03-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Power Polynomial (in Just Math)
Posted on 2019-03-21 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum of reciprocals (in Numbers)
Posted on 2019-03-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sick-quence (in Just Math) Rating: 4.00
Posted on 2019-03-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Math is radical (in Numbers) Rating: 3.00
Posted on 2019-03-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Factor it (in Numbers)
Posted on 2019-03-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Is this circular billiards? (in Geometry)
Posted on 2019-03-18 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Weird equations (in Just Math) Rating: 3.00
Posted on 2019-03-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Descartes roots (in Just Math)
Posted on 2019-03-17 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quad composition (in Just Math)
Posted on 2019-03-16 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5The Tiny Triangle (in Shapes)
Posted on 2019-03-15 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Where is the center? (in Geometry) Rating: 5.00
Posted on 2019-03-15 by Danish Ahmed Khan (No Solution Yet, 13 Comments)
Difficulty: 3 of 5'Two' many roots (in Just Math)
Posted on 2019-03-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mean the roots (in Calculus)
Posted on 2019-03-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Shifting the digit II (in Numbers)
Posted on 2019-03-13 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5A Golden Fraction (in Numbers)
Posted on 2019-03-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Digit Deduction (in Numbers) Rating: 5.00
Posted on 2019-03-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Shifting the digit (in Numbers)
Posted on 2019-03-11 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Median formula (in Just Math) Rating: 3.00
Posted on 2019-03-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Envelop the rhombuses (in Shapes) Rating: 5.00
Posted on 2019-03-09 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Minimizing the Denominator (in Numbers) Rating: 3.00
Posted on 2019-03-08 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A change of clothes (in Word Problems) Rating: 5.00
Posted on 2019-03-08 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rectangle on a cubic (in Just Math)
Posted on 2019-03-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Corruption in my file (in Probability)
Posted on 2019-03-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What's the calculator doing? (in General)
Posted on 2019-03-06 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A Great Greatest Common Divisor (in Numbers)
Posted on 2019-03-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5One step towards Regularity (in Geometry)
Posted on 2019-03-05 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Can rationalization help? (in Geometry)
Posted on 2019-03-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Subdivided parallelogram (in Geometry)
Posted on 2019-03-04 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Do defects have benefits? (in Science)
Posted on 2019-03-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Tan-ing the sine (in Just Math)
Posted on 2019-03-03 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The Great Comparison (in Numbers)
Posted on 2019-03-02 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Summing the pairs (in Just Math)
Posted on 2019-03-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 52018 to 2019 (in Numbers) Rating: 5.00
Posted on 2019-03-01 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5And counting (in Numbers)
Posted on 2019-02-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Shifted regions (in Just Math)
Posted on 2019-02-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Expanding Annulus (in Science)
Posted on 2019-02-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Counting Digit (in Numbers)
Posted on 2019-02-25 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Incentroid (in Geometry) Rating: 3.00
Posted on 2019-02-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Outfoxing a fox (in Calculus)
Posted on 2019-02-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5No Heron (in Just Math)
Posted on 2019-02-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Unlikely event (in Numbers)
Posted on 2019-02-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Teapot effect (in Science) Rating: 3.67
Posted on 2019-02-20 by Danish Ahmed Khan (No Solution Yet, 15 Comments)
Difficulty: 2 of 5Limited reflections (in General)
Posted on 2019-02-19 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Bifonacci (in Numbers)
Posted on 2019-02-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Chacun à son goût ! (in Just Math)
Posted on 2019-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Outcoming (in Geometry) Rating: 4.50
Posted on 2019-02-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Algebra? (in Just Math)
Posted on 2019-02-16 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5I squeeze, squeeze, and squeeze (in Geometry)
Posted on 2019-02-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Quick Divisiblity Proof (in Numbers)
Posted on 2019-02-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Recovering the number (in Numbers)
Posted on 2019-02-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Cut Cube (in Shapes)
Posted on 2019-02-13 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Triangle area / perimeter (in Just Math)
Posted on 2019-02-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Walking and Running (in General) Rating: 4.00
Posted on 2019-02-12 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 1 of 5600 sixes (in Numbers)
Posted on 2019-02-11 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Does It Continue? 11 (in Just Math) Rating: 5.00
Posted on 2019-02-10 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Equal Circles (in Geometry)
Posted on 2019-02-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A Walking puzzle (in Just Math)
Posted on 2019-02-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 5 of 5Spheres on a floor (in Geometry) Rating: 5.00
Posted on 2019-02-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Counting votes from percentages (in Just Math) Rating: 4.00
Posted on 2019-02-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Thunderstorm (in Just Math)
Posted on 2019-02-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 52 sets of primes (in Numbers)
Posted on 2019-02-04 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 53 coprime unknowns (in Numbers)
Posted on 2019-02-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Integers inside surds (in Numbers)
Posted on 2019-02-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Binomial dilemma (in Just Math) Rating: 3.00
Posted on 2019-02-02 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Neighbors differ by even numbers (in Numbers)
Posted on 2019-02-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5OMG Equation (in Just Math)
Posted on 2019-02-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Quick factors (in Numbers)
Posted on 2019-01-31 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 548th digit in the head (in Just Math)
Posted on 2019-01-30 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Consistency parameter (in Just Math)
Posted on 2019-01-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Digit Anagram II (in Numbers) Rating: 3.00
Posted on 2019-01-29 by Danish Ahmed Khan (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Smaller product (in Just Math)
Posted on 2019-01-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5An enumeration problem (in Just Math)
Posted on 2019-01-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Areal equality (in Geometry)
Posted on 2019-01-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Digit Hunting (in Just Math)
Posted on 2019-01-26 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Art Image (in General) Rating: 2.33
Posted on 2019-01-25 by Ady TZIDON (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Uniform distribution (in Probability)
Posted on 2019-01-25 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Digit Anagram (in Numbers) Rating: 5.00
Posted on 2019-01-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Smooth Sum Situation (in Sequences) Rating: 3.00
Posted on 2019-01-23 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Half a dozen of weights (in Weights and Scales)
Posted on 2019-01-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Repunits (in Numbers)
Posted on 2019-01-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square+27 (in Numbers)
Posted on 2019-01-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5An Average Student (in Numbers)
Posted on 2019-01-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 516 choices (in Just Math)
Posted on 2019-01-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 53^n is a sum of 3 squares (in Numbers)
Posted on 2019-01-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Extreme Rationalization (in Numbers)
Posted on 2019-01-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The source of two terms (in General)
Posted on 2019-01-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Worm ate the numbers (in Numbers)
Posted on 2019-01-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5From unrelated words to family (in Word Problems) Rating: 5.00
Posted on 2019-01-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5From ab to ba (in Logic) Rating: 3.00
Posted on 2019-01-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Grid nim: 2xN (in Games) Rating: 4.50
Posted on 2019-01-16 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Factorial Tremors (in Numbers)
Posted on 2019-01-16 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Dial W for WORD (in Word Problems)
Posted on 2019-01-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Discounted velos (in Just Math)
Posted on 2019-01-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reach home (in Just Math)
Posted on 2019-01-14 by Danish Ahmed Khan (No Solution Yet, 13 Comments)
Difficulty: 4 of 5N cups on a turntable (in Just Math) Rating: 5.00
Posted on 2019-01-13 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two triangles in a square (in Geometry)
Posted on 2019-01-12 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Ten ways to pack a cube? (in Shapes)
Posted on 2019-01-11 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cover the rectangle (in Just Math)
Posted on 2019-01-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Small difference (in Word Problems)
Posted on 2019-01-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sine recurrence (in Just Math)
Posted on 2019-01-08 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Equation! Just do it. (in Just Math)
Posted on 2019-01-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Square alphametics (in Numbers) Rating: 3.00
Posted on 2019-01-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Defining a number (in Numbers)
Posted on 2019-01-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Designing Planets (in Science) Rating: 1.00
Posted on 2019-01-04 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Ring in the New - again and again and again.. (in Numbers) Rating: 5.00
Posted on 2019-01-01 by broll (No Solution Yet, 2 Comments)
Difficulty: 3 of 524 pre-scheduled dates (in Just Math)
Posted on 2018-12-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 52 sets with common members (in Numbers)
Posted on 2018-12-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5CC & ET Expanded (in Just Math)
Posted on 2018-12-29 by broll (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Restoring a multiplication sample (in Just Math)
Posted on 2018-12-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Guessing the color (in Logic) Rating: 5.00
Posted on 2018-12-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Circle Between the Bell Curves (in Calculus)
Posted on 2018-12-23 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Complex (in Just Math) Rating: 4.00
Posted on 2018-12-22 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Probably Acute (in Just Math) Rating: 5.00
Posted on 2018-12-21 by Danish Ahmed Khan (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Copy and Construct (in Geometry)
Posted on 2018-12-20 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Restoring a definition (in Word Problems)
Posted on 2018-12-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cover half a square (in Geometry)
Posted on 2018-12-18 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Always zero or four (in Numbers)
Posted on 2018-12-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Concentric Circles and Equilateral Triangle (in Just Math) Rating: 5.00
Posted on 2018-12-15 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Colored triangle (in Sequences) Rating: 4.00
Posted on 2018-12-14 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Discs in Triangle (in Geometry) Rating: 3.50
Posted on 2018-12-13 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Hoops (in Just Math)
Posted on 2018-12-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rolling Ellipse (in Geometry)
Posted on 2018-12-07 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 58 distinct partitions (in Numbers)
Posted on 2018-12-06 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Square after square creates a new square (in Numbers)
Posted on 2018-12-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Heptagonal Beauty (in Geometry)
Posted on 2018-12-02 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sudoku 1 (starting clues) (in Games) Rating: 1.00
Posted on 2018-11-30 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Esot(e)ric word (in Word Problems)
Posted on 2018-11-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Increasing numbers representation (in Sequences)
Posted on 2018-11-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 5 of 55 circles in a hexagon. (in Geometry)
Posted on 2018-11-25 by Jer (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Distance squared (in Calculus)
Posted on 2018-11-24 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Mean Diagonals (in Calculus)
Posted on 2018-11-23 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 53 equal products (in Numbers)
Posted on 2018-11-21 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5All Primes (in Just Math)
Posted on 2018-11-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5MOI of a magic square (in Just Math)
Posted on 2018-11-16 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Sine of Squared (in Calculus) Rating: 5.00
Posted on 2018-11-15 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5The penultimate digit (in Just Math)
Posted on 2018-11-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Too Small of an Angle (in Just Math)
Posted on 2018-11-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5The Unit Square in the Circle (in Geometry)
Posted on 2018-11-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 53D rooks puzzle (in Just Math) Rating: 3.00
Posted on 2018-11-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Tangent Ellipses (in Just Math)
Posted on 2018-11-08 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Body parts (in Riddles) Rating: 5.00
Posted on 2018-11-06 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Duelling pairs (in Games)
Posted on 2018-11-02 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Reverse reasoning (in Logic)
Posted on 2018-11-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Defining a sequence (in Just Math)
Posted on 2018-10-31 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5One-peak sets (in Just Math)
Posted on 2018-10-30 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Zeta sine (in Just Math)
Posted on 2018-10-28 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A 3-digit number (in Numbers)
Posted on 2018-10-27 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 4 of 5The wisdom of Windsor (in Word Problems)
Posted on 2018-10-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Matching 27 (in Numbers)
Posted on 2018-10-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5One trial only! (in Weights and Scales)
Posted on 2018-10-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Equation with factorial (in Just Math)
Posted on 2018-10-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A series of primes equals N (in Numbers)
Posted on 2018-10-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Parcelation (in Geometry)
Posted on 2018-10-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A partial cryptoquote (in Word Problems)
Posted on 2018-10-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Introducing sphenic numbers (in Numbers)
Posted on 2018-10-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Within a triangle (in Geometry) Rating: 3.00
Posted on 2018-10-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Emirps census (in Sequences)
Posted on 2018-10-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reversal creates average (in Sequences)
Posted on 2018-10-10 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Calling spade a spade (in Numbers)
Posted on 2018-10-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Feathers of different colors (in Numbers)
Posted on 2018-10-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 52Z out (in Sequences) Rating: 5.00
Posted on 2018-10-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Who pinched the dice? (in Probability)
Posted on 2018-10-04 by broll (No Solution Yet, 10 Comments)
Difficulty: 3 of 5At least 3 zeroes (in Sequences)
Posted on 2018-10-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Monty Hall variant (in Probability)
Posted on 2018-09-30 by Jer (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Prime magic (in Numbers)
Posted on 2018-09-29 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Prime phone (in Numbers)
Posted on 2018-09-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Any conclusions? (in Logic)
Posted on 2018-09-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5True or not (in General)
Posted on 2018-09-25 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Antigrams wanted (in Word Problems) Rating: 5.00
Posted on 2018-09-21 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5One rope, two flagpoles... (in Logic) Rating: 5.00
Posted on 2018-09-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Name the sequence (in Sequences)
Posted on 2018-09-17 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 531 days ago (in Word Problems)
Posted on 2018-09-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Always solvable (in Numbers)
Posted on 2018-09-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A packing exercise (in Shapes)
Posted on 2018-09-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5A formal proof requested (in Just Math) Rating: 3.00
Posted on 2018-09-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5It is either O or E (in General) Rating: 2.00
Posted on 2018-09-12 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Lefties and righties 2 (in Logic) Rating: 3.00
Posted on 2018-09-11 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fibo meets Lucas #1 (in Numbers)
Posted on 2018-09-09 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Compare them (in Numbers)
Posted on 2018-09-08 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A Cone and a Sphere (in Just Math)
Posted on 2018-09-07 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Weight of nothing in an elevator (in Science)
Posted on 2018-09-06 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5How to do it? (in Geometry) Rating: 5.00
Posted on 2018-09-05 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Around the beast number (in Numbers)
Posted on 2018-09-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Ones vs twos (in Numbers) Rating: 3.00
Posted on 2018-09-03 by Ady TZIDON (No Solution Yet, 47 Comments)
Difficulty: 3 of 5Summing up factorials (in Numbers)
Posted on 2018-09-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Complicated Tangency (in Geometry)
Posted on 2018-09-01 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A pet ant (in Shapes)
Posted on 2018-08-31 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Ignoring an error (in Just Math)
Posted on 2018-08-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sufficient or not? (in Numbers) Rating: 5.00
Posted on 2018-08-29 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Power tower (in Numbers)
Posted on 2018-08-26 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A set of numbers (in Numbers)
Posted on 2018-08-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 5 of 5Ant highway with energy loss (in Calculus)
Posted on 2018-08-24 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Tax deduction (in Numbers) Rating: 3.00
Posted on 2018-08-22 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Tiling 3x110 grid (in Just Math) Rating: 4.33
Posted on 2018-08-21 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Winner moves (in Probability)
Posted on 2018-08-20 by Jer (No Solution Yet, 2 Comments)
Difficulty: 1 of 5What's next? (3) (in Sequences)
Posted on 2018-08-19 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Just a search (in Numbers)
Posted on 2018-08-18 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Ant highway (in Shapes)
Posted on 2018-08-17 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5In Memoriam (in Numbers) Rating: 5.00
Posted on 2018-08-16 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Roll away (in Calculus)
Posted on 2018-08-15 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Tippy table (in Shapes)
Posted on 2018-08-14 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 531 created by 4 successive integers (in Numbers) Rating: 3.00
Posted on 2018-08-13 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Six or less? (in Just Math)
Posted on 2018-08-09 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Shirtless ? Even nude! (in Numbers)
Posted on 2018-08-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5When P. meets F. (in Just Math)
Posted on 2018-08-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 57 in row (in Numbers)
Posted on 2018-08-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Goldbach's double (in Just Math)
Posted on 2018-08-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 51st 101-digit prime (in Numbers) Rating: 3.00
Posted on 2018-08-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Ten to five (in Numbers) Rating: 3.00
Posted on 2018-07-30 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Square - both ways (in Numbers)
Posted on 2018-07-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 58191 has a partner (in Numbers)
Posted on 2018-07-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 599 as an example (in Numbers) Rating: 5.00
Posted on 2018-07-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Odd-abundant numbers. (in Numbers)
Posted on 2018-07-21 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5White to move (in Games)
Posted on 2018-07-20 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Albums ?? (in Just Math)
Posted on 2018-07-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Truncatable primes (in Numbers)
Posted on 2018-07-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Counting sudokus (in Numbers)
Posted on 2018-07-13 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Probability of being coprime (in Probability)
Posted on 2018-07-11 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Magic square of cubes (in Numbers)
Posted on 2018-07-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Some prime sequences (in Numbers)
Posted on 2018-07-04 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Who's on the second base? (in Numbers)
Posted on 2018-07-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 57 come zero (in Probability) Rating: 5.00
Posted on 2018-06-28 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Summing consecutive factorials (in Just Math)
Posted on 2018-06-26 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A simple equation (in Just Math)
Posted on 2018-06-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Sum of reciprocals (in Just Math)
Posted on 2018-06-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 53 cubes (in Numbers)
Posted on 2018-06-21 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Non-zero integers (in Just Math)
Posted on 2018-06-20 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Space guys (in Just Math)
Posted on 2018-06-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Square Divisiblity (in Numbers) Rating: 3.00
Posted on 2018-06-17 by Daniel (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Zero is the last digit of S (in Numbers) Rating: 5.00
Posted on 2018-06-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Looking for a square result (in Just Math)
Posted on 2018-06-14 by Ady TZIDON (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Cubes of couples (in Numbers)
Posted on 2018-06-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Evaluate probability (in Probability)
Posted on 2018-06-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5How fast can you solve it? (in Just Math)
Posted on 2018-06-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Cyclic Quadrilateral Tessellation (in Geometry)
Posted on 2018-06-09 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Define number n in n letters (in General)
Posted on 2018-06-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5a NEWS puzzle (in Just Math)
Posted on 2018-06-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Palindrome in 4 steps (in Numbers)
Posted on 2018-06-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Sort it out ! (in Just Math)
Posted on 2018-06-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Optimal result (in Just Math) Rating: 2.00
Posted on 2018-06-04 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Equidistant point (in Geometry) Rating: 3.00
Posted on 2018-06-03 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The Petersen graph (in Logic)
Posted on 2018-06-02 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Ls, Os & Ses left ... (in Word Problems) Rating: 3.00
Posted on 2018-06-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5State of art (in Numbers)
Posted on 2018-05-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Pascal revisited (in Numbers) Rating: 3.00
Posted on 2018-05-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5What is the value of D? (in Just Math)
Posted on 2018-05-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Self-numbers and generators (in Numbers)
Posted on 2018-05-23 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Another True Story (in General)
Posted on 2018-05-22 by broll (No Solution Yet, 3 Comments)
Difficulty: 3 of 5From primes to palindromes (in Numbers)
Posted on 2018-05-16 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Explain Plato's affinity (in Numbers) Rating: 5.00
Posted on 2018-05-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Equally Spaced (in Geometry)
Posted on 2018-05-13 by Bractals (No Solution Yet, 4 Comments)
Difficulty: 4 of 5How about 138? (in Sequences)
Posted on 2018-05-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5From NPR (in Just Math)
Posted on 2018-05-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Unique definition (in Numbers)
Posted on 2018-05-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What is the best question? (in Probability) Rating: 4.00
Posted on 2018-05-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Where's Bob? (in General) Rating: 4.67
Posted on 2018-05-01 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Some of these and some of those (in Numbers)
Posted on 2018-04-30 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5It is not 42 (in Numbers)
Posted on 2018-04-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Areas equalizer (in Geometry)
Posted on 2018-04-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5IMPROVED? (in Just Math)
Posted on 2018-04-27 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Two random points (in Probability)
Posted on 2018-04-26 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5XFL (in General)
Posted on 2018-04-25 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5When polynomial and trigo unite! (in Calculus)
Posted on 2018-04-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Pandigital set II (in Numbers)
Posted on 2018-04-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5If only it's a power of three (in Just Math)
Posted on 2018-04-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An almost regular tetrahedron (in Geometry)
Posted on 2018-04-20 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The Devil 30-gon (in Geometry)
Posted on 2018-04-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find a Few Functions (in Calculus) Rating: 4.00
Posted on 2018-04-15 by Larry (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A pandigital set (in Numbers) Rating: 5.00
Posted on 2018-04-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Prime stars (in Just Math)
Posted on 2018-04-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Angle in an Equilateral Pentagon (in Geometry)
Posted on 2018-04-12 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Easy Peasy Parabola (in Geometry)
Posted on 2018-04-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The royal sisters (in Just Math)
Posted on 2018-04-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Simple recursion (in Sequences)
Posted on 2018-04-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prime records (in Sequences) Rating: 4.50
Posted on 2018-04-06 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Parenthetical Integer (in Numbers)
Posted on 2018-04-04 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Cube Decomposition (in Geometry)
Posted on 2018-04-02 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Better late than never ...HNY (in Just Math)
Posted on 2018-04-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Pascal Determinant (in Just Math)
Posted on 2018-03-31 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Goldiolics (in Just Math) Rating: 5.00
Posted on 2018-03-30 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Comb(k,2) (in Numbers)
Posted on 2018-03-29 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5One square implies many (in Sequences)
Posted on 2018-03-28 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Four singers (in Tricks)
Posted on 2018-03-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Generating triplets of squares (in Just Math)
Posted on 2018-03-25 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Boxed Parabolas (in Geometry)
Posted on 2018-03-24 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Not enough information! (in Science)
Posted on 2018-03-23 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5She has moved (in Numbers)
Posted on 2018-03-22 by armando (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Colored beads (in Just Math)
Posted on 2018-03-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5All in the USA (in Numbers) Rating: 5.00
Posted on 2018-03-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Three squares imply the fourth (in Just Math)
Posted on 2018-03-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Starting with 1,2,3 (in Sequences)
Posted on 2018-03-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5 3x3 magic square of squares (in Numbers)
Posted on 2018-03-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5six and thirteen (in Numbers)
Posted on 2018-03-15 by armando (No Solution Yet, 9 Comments)
Difficulty: 3 of 5The Truman Show (in Geometry)
Posted on 2018-03-02 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Square products (in Just Math)
Posted on 2018-02-27 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 54 digit number derived from a single digit (in Numbers)
Posted on 2018-02-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three, three and the key (in Cryptography) Rating: 4.00
Posted on 2018-02-23 by armando (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A sixth power in many ways (in Numbers)
Posted on 2018-02-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5 Strictly non-palindromic numbers (in Numbers)
Posted on 2018-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Double Secant (in Geometry)
Posted on 2018-02-15 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Four fours (in Numbers)
Posted on 2018-02-14 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Find the arc (in Geometry)
Posted on 2018-02-08 by Kenny M (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Carpenter's pricing (in Just Math)
Posted on 2018-02-05 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Incenter and a half (in Geometry)
Posted on 2018-02-03 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cute numbers (in Numbers)
Posted on 2018-02-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A long day of chess (in Just Math)
Posted on 2018-01-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Evaluate the missing digit (in Just Math)
Posted on 2018-01-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5How many numbers in the end? (in Numbers)
Posted on 2018-01-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quite a pair! (in Numbers) Rating: 5.00
Posted on 2018-01-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadrilateral fill in the blank (in Shapes)
Posted on 2018-01-25 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Champagnat numbers (in Just Math)
Posted on 2018-01-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Sleeping Beauty problem (in Probability)
Posted on 2018-01-22 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Easy to remember (in Numbers)
Posted on 2018-01-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Quite a coincidence (in Just Math) Rating: 3.00
Posted on 2018-01-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Magic triangles (in Just Math)
Posted on 2018-01-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5A set of subsets (in Just Math) Rating: 5.00
Posted on 2018-01-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Fair slices (in Geometry)
Posted on 2018-01-16 by Jer (No Solution Yet, 8 Comments)
Difficulty: 1 of 5Get even (in Numbers)
Posted on 2018-01-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Evaluating a distance (in Geometry)
Posted on 2018-01-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 515 letter 'words' (in Just Math) Rating: 5.00
Posted on 2018-01-11 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Discounting one (in Numbers)
Posted on 2018-01-10 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 53N3 (in Numbers)
Posted on 2018-01-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Overheard in Manitoba (in Numbers)
Posted on 2018-01-06 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A special phenomenon (in Logic) Rating: 5.00
Posted on 2018-01-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three questions plus one challenge (in Numbers)
Posted on 2018-01-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Simple fractions (in Just Math) Rating: 3.00
Posted on 2018-01-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 55-digit number (in Just Math)
Posted on 2018-01-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Magic magic (in Numbers)
Posted on 2018-01-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Circumcenters and Vectors (in Geometry)
Posted on 2017-12-31 by Bractals (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Three triplets (in Numbers)
Posted on 2017-12-30 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Pandigital and divisible (in Numbers)
Posted on 2017-12-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Below 25 (in Numbers)
Posted on 2017-12-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A prime nonuplet (in Numbers) Rating: 5.00
Posted on 2017-12-27 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Expanding the railroad line (in Just Math)
Posted on 2017-12-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Young Girl's Age (in Just Math)
Posted on 2017-12-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Magic circle revisited (in Numbers) Rating: 3.00
Posted on 2017-12-22 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5One problem - many ways to solve... (in Numbers)
Posted on 2017-12-21 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A true story (in Numbers) Rating: 5.00
Posted on 2017-12-20 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5East Pole, West Pole. (in General)
Posted on 2017-12-19 by broll (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Given one, get the other three (in Numbers) Rating: 3.00
Posted on 2017-12-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Fibo was a winner (in Numbers)
Posted on 2017-12-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Squares in a rectangle (in Numbers)
Posted on 2017-12-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Fibo's zeroes repeated (in Numbers)
Posted on 2017-12-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5LOP (in Geometry)
Posted on 2017-12-13 by Bractals (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Perform and explain (in Tricks)
Posted on 2017-12-12 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Enigma (in Logic)
Posted on 2017-12-11 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Verify and prove (in Sequences)
Posted on 2017-12-10 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5All, except two (in Sequences)
Posted on 2017-12-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Spelling bee results (in Just Math) Rating: 2.00
Posted on 2017-12-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A creative contest (in Word Problems)
Posted on 2017-12-07 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Three fours (in Numbers)
Posted on 2017-12-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Just name the date (in General)
Posted on 2017-12-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5No miracles (in Famous Riddles) Rating: 4.00
Posted on 2017-12-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Just 4 different digits (in Numbers)
Posted on 2017-12-03 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 4 of 5One ninth of a pandigital (in Numbers)
Posted on 2017-12-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5One triplet of digits (in Numbers) Rating: 3.50
Posted on 2017-12-01 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Dice stacking (in Games)
Posted on 2017-11-28 by TheKPAXian (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Unique decimal primes (in Algorithms)
Posted on 2017-11-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Way to go (in Riddles) Rating: 4.00
Posted on 2017-11-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A pandigital sum (in Numbers)
Posted on 2017-11-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Where Did You Start? (in Just Math) Rating: 4.00
Posted on 2017-11-16 by chun (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Your creativity challenged (in Riddles)
Posted on 2017-11-15 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Making a 10 (in Numbers) Rating: 4.00
Posted on 2017-11-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5No comments (in General)
Posted on 2017-11-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Beast number as a substring (in Numbers)
Posted on 2017-11-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5From words to equations (in General)
Posted on 2017-11-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Talking BIG (in Numbers)
Posted on 2017-11-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Expose ambiguity II (in Sequences)
Posted on 2017-11-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reverse Engineering I (in Cryptography) Rating: 3.00
Posted on 2017-11-09 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5One digit answer (in Numbers) Rating: 3.00
Posted on 2017-11-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cryptajoke XVIII (in Cryptography)
Posted on 2017-11-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Attributed to Lewis Carroll (in Probability) Rating: 3.00
Posted on 2017-11-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Rectangle in a circle (in Just Math)
Posted on 2017-11-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5No big digits involved (in Numbers)
Posted on 2017-11-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Searching for the minimal repunit (in Numbers)
Posted on 2017-11-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square triplets (in Just Math)
Posted on 2017-11-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5More than 3 cubes (in Just Math)
Posted on 2017-11-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Recovering the unknown triplet (in Numbers)
Posted on 2017-11-03 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5X & Y erased (in Numbers) Rating: 3.00
Posted on 2017-11-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Truth or consequences (in Just Math)
Posted on 2017-11-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Only one number qualifies! (in Numbers)
Posted on 2017-11-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Counting appearances (in Numbers)
Posted on 2017-11-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 52 ways to prove it (in Just Math) Rating: 4.00
Posted on 2017-10-31 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Create 2 congruent triangles (in Geometry) Rating: 3.00
Posted on 2017-10-31 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Online translation (in Tricks)
Posted on 2017-10-30 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A common feature (in Numbers)
Posted on 2017-10-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two SPECIAL PARTITIONS (in Numbers)
Posted on 2017-10-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5A recursive game (in Sequences)
Posted on 2017-10-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Leaving the least (the most) (in Numbers)
Posted on 2017-10-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5More Than One Solution? (in Games) Rating: 3.00
Posted on 2017-10-26 by Charlie (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Obtuse angle? (in Probability)
Posted on 2017-10-25 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Urban architecture (in Word Problems)
Posted on 2017-10-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5No integer roots (in Just Math)
Posted on 2017-10-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 531 or more (in Games)
Posted on 2017-10-21 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 53 lowest score words (in Word Problems) Rating: 5.00
Posted on 2017-10-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Does it continue? An original. (in Numbers)
Posted on 2017-10-20 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5The Odds Must Be Crazy (in Probability)
Posted on 2017-10-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Alfey revava ... (in General)
Posted on 2017-10-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5He, me, and you (in Word Problems)
Posted on 2017-10-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two-three integers (in Numbers)
Posted on 2017-10-15 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5If two then three (in Just Math)
Posted on 2017-10-14 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Clear and Simple (in Cryptography)
Posted on 2017-10-12 by broll (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Equal Power Sum Sets (in Numbers)
Posted on 2017-10-11 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Somewhere in the USA (in Word Problems) Rating: 5.00
Posted on 2017-10-10 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Like CABACB (in Word Problems)
Posted on 2017-10-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Does it continue? 10: Alternate differences (in Numbers)
Posted on 2017-10-07 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Cryptoquip (in Word Problems)
Posted on 2017-10-06 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Squeeze in (in Word Problems)
Posted on 2017-10-05 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5In Europe (in General)
Posted on 2017-10-04 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Does it continue? 9: Diophantine friends (in Numbers)
Posted on 2017-10-03 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A set of ages (in Just Math)
Posted on 2017-10-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Oddly even numbers (in Numbers)
Posted on 2017-10-01 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Does it continue? 8: Prime together (in Numbers)
Posted on 2017-09-30 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A scrambled BEDLAM (in Just Math)
Posted on 2017-09-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Does it continue? 7: Partial sums again (in Numbers)
Posted on 2017-09-28 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Toasting the eternal (in Just Math)
Posted on 2017-09-27 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Does it continue? 6: Partial sums (in Numbers)
Posted on 2017-09-25 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Does it continue? 5: powers of 2 (in Numbers) Rating: 5.00
Posted on 2017-09-24 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Solve the alpha2etic ! (in Just Math)
Posted on 2017-09-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Does it continue? 4: Euclid's next prime (in Numbers)
Posted on 2017-09-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Does it continue? 3: Growing table of primes (in Numbers)
Posted on 2017-09-19 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Proving an inequality (in Geometry) Rating: 4.00
Posted on 2017-09-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Does it continue? 2: Prime or not? (in Numbers) Rating: 5.00
Posted on 2017-09-16 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Reverse Engineering (in General)
Posted on 2017-09-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Does it continue? 1: Chord regions (in Sequences)
Posted on 2017-09-13 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Sans squares (in Sequences)
Posted on 2017-09-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5MMMMMM Donut (in Just Math)
Posted on 2017-09-11 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Lots of lods (in Sequences) Rating: 4.67
Posted on 2017-09-10 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5An unsolved double murder (in Logic)
Posted on 2017-09-08 by ollie (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Product of 100 factorials (in Just Math) Rating: 3.50
Posted on 2017-09-07 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Who began with 50 cents? (in Just Math)
Posted on 2017-09-06 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5The rain in Spain (in Just Math)
Posted on 2017-09-05 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Getting closer to your pie (in Numbers)
Posted on 2017-09-04 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Solve a generic set of equations (in Just Math) Rating: 3.00
Posted on 2017-09-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Two sums of digits (in Just Math)
Posted on 2017-09-02 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Tea-time cakes (in Just Math)
Posted on 2017-09-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Are we there yet? (in Probability)
Posted on 2017-08-30 by Kenny M (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Simple trains problem (in Just Math) Rating: 3.00
Posted on 2017-08-29 by Jer (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Triangle in a triangle (in Shapes)
Posted on 2017-08-28 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Avoiding lattice midpoints (in General) Rating: 5.00
Posted on 2017-08-27 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Strobogrammatic to pandigital (in Numbers) Rating: 5.00
Posted on 2017-08-26 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Leaving a maximal result (in Algorithms)
Posted on 2017-08-25 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Two erased numbers (in Sequences)
Posted on 2017-08-24 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Prime ages (in Just Math)
Posted on 2017-08-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5smallest large = largest small (in Logic) Rating: 3.00
Posted on 2017-08-22 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A pint, please. (in General)
Posted on 2017-08-20 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A repunit product (in Word Problems)
Posted on 2017-08-19 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Planks across a ditch (in Shapes) Rating: 4.00
Posted on 2017-08-17 by Jer (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Marbles in boxes (in Algorithms)
Posted on 2017-08-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5At the bridge club (in Logic) Rating: 5.00
Posted on 2017-08-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Ellipse in a Truncated Triangle (in Shapes)
Posted on 2017-08-13 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Divisibility in a sequence (in Numbers)
Posted on 2017-08-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bob and Alice make a poor choice (in Numbers)
Posted on 2017-08-11 by broll (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Straight or rotated (in Numbers) Rating: 5.00
Posted on 2017-08-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Even (related) chances (in Probability)
Posted on 2017-08-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Palindromic sum (in Just Math)
Posted on 2017-08-08 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A text sans (in Word Problems)
Posted on 2017-08-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Nondivisibility by 11 (in Just Math) Rating: 4.00
Posted on 2017-08-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5A unique Heronian triangle (in Geometry)
Posted on 2017-08-05 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Published in the thirties (in Famous Riddles) Rating: 4.00
Posted on 2017-08-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Think big (in Numbers)
Posted on 2017-08-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Dec = xeh (in Numbers)
Posted on 2017-08-02 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Two parallelograms (in Geometry) Rating: 3.00
Posted on 2017-08-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sequence of Sets (in Sequences)
Posted on 2017-07-30 by Bractals (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Heronian with consecutives (in Geometry) Rating: 3.00
Posted on 2017-07-29 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5From The Book of Squares (in Numbers) Rating: 3.00
Posted on 2017-07-26 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5An ambiguous inheritance (in Just Math)
Posted on 2017-07-25 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Pandigitals Divided by 11 (in Numbers)
Posted on 2017-07-23 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5From Mahavira (in Just Math)
Posted on 2017-07-18 by Jer (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Guess who (in Sequences)
Posted on 2017-07-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Unpainting Black (in Probability)
Posted on 2017-07-14 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Fermat numbers (in Numbers) Rating: 4.00
Posted on 2017-07-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Make the proof full-proof (in Word Problems)
Posted on 2017-07-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 54 options (in Probability)
Posted on 2017-07-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Regular N-gon (in Geometry) Rating: 4.00
Posted on 2017-07-09 by Bractals (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pythagorean H/L ratios (in Just Math)
Posted on 2017-07-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Just add 2 letters (in Word Problems)
Posted on 2017-07-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Many Knights (in Games)
Posted on 2017-07-05 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Larger area / larger perimeter (in Numbers)
Posted on 2017-07-03 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 53,7,8 as a start (in Numbers)
Posted on 2017-07-02 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 4 of 52 kids 3 boxes (in Games) Rating: 4.00
Posted on 2017-07-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square Egyptians (in Numbers)
Posted on 2017-06-28 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Giveaway ratios (in Numbers)
Posted on 2017-06-26 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Lewis Carroll's finding (in Geometry)
Posted on 2017-06-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Combinatory logic (in Logic)
Posted on 2017-06-24 by Math Man (No Solution Yet, 0 Comments)
Difficulty: 3 of 52017 to start with (in Numbers)
Posted on 2017-06-23 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Odd Egyptians (in Numbers)
Posted on 2017-06-21 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Punchline I (in Word Problems) Rating: 3.00
Posted on 2017-06-19 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Rational number's conversion (in Just Math) Rating: 5.00
Posted on 2017-06-18 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Love story (in General)
Posted on 2017-06-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pythagoras' corner (in Geometry)
Posted on 2017-06-16 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5a cube = s.o.d . (in Numbers) Rating: 3.00
Posted on 2017-06-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Paradox? Not really (in Probability)
Posted on 2017-06-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Candy lover (in Liars and Knights)
Posted on 2017-06-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A madness sequence (50 digits) (in Sequences) Rating: 2.00
Posted on 2017-06-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Add another line (in General)
Posted on 2017-06-10 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Double black (in Probability) Rating: 2.67
Posted on 2017-06-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 518 is not enough (in Sequences) Rating: 3.00
Posted on 2017-06-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Delian delight (in Geometry)
Posted on 2017-06-04 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5From right to left (in Weights and Scales) Rating: 4.00
Posted on 2017-06-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Unbalanced?- No problem (in Weights and Scales) Rating: 4.00
Posted on 2017-05-30 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Oleg or Erdös? (in Games) Rating: 4.00
Posted on 2017-05-26 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 55 dice (in Probability) Rating: 3.00
Posted on 2017-05-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Add one more circle (in Geometry)
Posted on 2017-05-21 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Seven Point Placement (in Shapes) Rating: 4.00
Posted on 2017-05-20 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hands off! (in Weights and Scales) Rating: 3.00
Posted on 2017-05-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Not every prime qualifies! (in Numbers)
Posted on 2017-05-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Twice blind (in Numbers)
Posted on 2017-05-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5How much is "?" ? (in Numbers)
Posted on 2017-05-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Dirichlet sends his regards (in Logic) Rating: 3.00
Posted on 2017-05-12 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Inder Taneja's discovery (in Numbers)
Posted on 2017-05-11 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The length of the belt (in Geometry) Rating: 3.00
Posted on 2017-05-09 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5No software allowed ! (in Numbers)
Posted on 2017-05-07 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5All ten (in Numbers)
Posted on 2017-05-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Sum and Difference II (in Numbers)
Posted on 2017-05-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Strange Summation (in Numbers)
Posted on 2017-05-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pandigital + (in Probability)
Posted on 2017-05-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The smallest non-conformist (in Numbers)
Posted on 2017-05-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A cent or more? (in Probability)
Posted on 2017-05-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Many equal shapes (in Geometry)
Posted on 2017-04-30 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Smallest pandifibo number (in Numbers)
Posted on 2017-04-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Eat as eat can (in Numbers) Rating: 3.00
Posted on 2017-04-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Baker to butcher to baker (in Just Math)
Posted on 2017-04-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Driven by greed (in General)
Posted on 2017-04-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5e as a pandigital expression (in Numbers)
Posted on 2017-04-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Maxim, Minerva & Kangaroo (in Numbers)
Posted on 2017-04-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5The Dot-town Suicides (in Logic)
Posted on 2017-04-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Is it a conic? (in Geometry) Rating: 4.00
Posted on 2017-04-19 by Jer (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Polygon Overlap (in Geometry)
Posted on 2017-04-17 by Bractals (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pandigital and square (in Numbers)
Posted on 2017-04-15 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Four Random People on a Bridge (in General)
Posted on 2017-04-14 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Growth Potential (in Algorithms) Rating: 4.00
Posted on 2017-04-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Sticks in a Cube (in Shapes)
Posted on 2017-04-11 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Names in Boxes (in Logic) Rating: 4.00
Posted on 2017-04-09 by Ady TZIDON (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Excellent numbers (in Numbers)
Posted on 2017-04-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5What is the value of "?" ? (in General)
Posted on 2017-04-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Long live the vowels (in Word Problems)
Posted on 2017-04-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5S.o.S is S (in Numbers) Rating: 2.00
Posted on 2017-04-03 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Three mirrored multiplications (in Numbers)
Posted on 2017-04-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Murder in the Castle (in Logic) Rating: 4.00
Posted on 2017-03-30 by ollie (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Over 18 (in Sequences)
Posted on 2017-03-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Why is it D2? (in Numbers)
Posted on 2017-03-27 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 51 is one of them (in Numbers)
Posted on 2017-03-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5True for nine and up (in Numbers)
Posted on 2017-03-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5POPANASIS (in Word Problems)
Posted on 2017-03-23 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Up and up (in Numbers) Rating: 5.00
Posted on 2017-03-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5 The sum of 2016 terms (in Sequences)
Posted on 2017-03-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5 Elongated Pentagonal Orthocupola's vertices (in Shapes)
Posted on 2017-03-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5A rare palindrome (in Numbers)
Posted on 2017-03-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Same side story (in Probability)
Posted on 2017-03-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Integers and their sums of digits (in Just Math)
Posted on 2017-03-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Square Slab and a Cube (in Shapes)
Posted on 2017-03-12 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Three heights in a triangle (in Geometry)
Posted on 2017-03-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Staircases in a Cube (in Shapes)
Posted on 2017-03-10 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5 1 progression, 2 sums, 3 numbers (in Just Math)
Posted on 2017-03-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Facing each other (in Just Math)
Posted on 2017-03-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5At most - equality (in Just Math)
Posted on 2017-03-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Problem on its own (in Geometry)
Posted on 2017-03-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Inequality with a constraint (in Just Math)
Posted on 2017-03-04 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Run Away Redux (in Games) Rating: 3.00
Posted on 2017-03-03 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Only real x counted (in Probability)
Posted on 2017-03-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Rectangle Point (in Geometry)
Posted on 2017-02-28 by Bractals (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Never a square (in Numbers)
Posted on 2017-02-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Scanning Bard's masterpiece (in Word Problems)
Posted on 2017-02-25 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Areas ratio (in Probability)
Posted on 2017-02-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Fibonacci Fib (in Sequences) Rating: 5.00
Posted on 2017-02-23 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Italian, English, and both (in General) Rating: 4.00
Posted on 2017-02-22 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Circumcenters and Incenters (in Geometry) Rating: 5.00
Posted on 2017-02-19 by Bractals (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square expressions (in Numbers)
Posted on 2017-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Placing 4 integers within a set interval (in Just Math)
Posted on 2017-02-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sets' intersection (in Just Math)
Posted on 2017-02-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5S.O.S. is not a prime (in Numbers)
Posted on 2017-02-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Odds are ... (in Probability) Rating: 3.50
Posted on 2017-02-14 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Trying to reach a Pythagorean triplet (in Just Math)
Posted on 2017-02-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No crossing (in General)
Posted on 2017-02-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Most words from your word (in Word Problems)
Posted on 2017-02-10 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Lies, truth, and logic (in Liars and Knights) Rating: 1.00
Posted on 2017-02-09 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A better approximate Pythagorean Theorem (in Calculus)
Posted on 2017-02-08 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Forward and Backward Word Values (in General) Rating: 4.50
Posted on 2017-02-07 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Integer couples (in Numbers)
Posted on 2017-02-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A table 4 4 (in Just Math)
Posted on 2017-02-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Almost Pythagorean Theorem (in Calculus) Rating: 3.00
Posted on 2017-02-03 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5T better than S (in Famous Riddles) Rating: 2.00
Posted on 2017-02-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Given VI, evaluate VII (in Sequences)
Posted on 2017-02-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Multiples with 3 (in Numbers) Rating: 5.00
Posted on 2017-01-31 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Opening your eyes (in Famous Riddles) Rating: 2.00
Posted on 2017-01-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 51,3,8 ...extend! (in Numbers) Rating: 5.00
Posted on 2017-01-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Ain't she clever? (in Just Math)
Posted on 2017-01-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Non-zero solutions only (in Just Math)
Posted on 2017-01-23 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Additional values (in Just Math)
Posted on 2017-01-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Powers of x and y (in Just Math) Rating: 4.00
Posted on 2017-01-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Six (or more) sextuples (in Numbers)
Posted on 2017-01-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Topical Quotation V (in Word Problems)
Posted on 2017-01-18 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An interesting recurrence (in Numbers) Rating: 5.00
Posted on 2017-01-17 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Age Progression (in Numbers)
Posted on 2017-01-16 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Square OR 2*square (in Numbers)
Posted on 2017-01-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 52nd grade math (in Probability)
Posted on 2017-01-12 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Proving divisibility (in Just Math)
Posted on 2017-01-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5(x−y)^ n = xy (in Just Math)
Posted on 2017-01-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5From Tangent to Circle (in Geometry) Rating: 3.00
Posted on 2017-01-04 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Counting brackets (in Just Math)
Posted on 2017-01-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Which is the biggest? (in Numbers)
Posted on 2017-01-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Congruent Incircles (in Geometry) Rating: 5.00
Posted on 2017-01-01 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A set of 3 equations (in Just Math) Rating: 3.50
Posted on 2016-12-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Skill or food? (in Numbers)
Posted on 2016-12-28 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Who discovered the secret? (in Logic)
Posted on 2016-12-27 by ollie (No Solution Yet, 4 Comments)
Difficulty: 1 of 5As EZ as UC it (in Numbers) Rating: 4.00
Posted on 2016-12-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5No change in its value (in Numbers)
Posted on 2016-12-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A chain of powers (in Sequences) Rating: 4.00
Posted on 2016-12-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Exclusive Inverter (in Algorithms) Rating: 3.00
Posted on 2016-12-21 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Legally Blonde (in Liars and Knights) Rating: 3.00
Posted on 2016-12-19 by Math Man (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Primitive Prime Divisors (in Sequences)
Posted on 2016-12-17 by broll (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Traveling with Luggage (in Logic) Rating: 3.00
Posted on 2016-12-15 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5It's all in the stars (in Just Math)
Posted on 2016-12-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Decimal and Binary Representation (in Numbers)
Posted on 2016-12-13 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Pentagon Partitions (in Shapes)
Posted on 2016-12-11 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Same Real Roots (in Just Math)
Posted on 2016-12-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Gluing Cubes (in Shapes)
Posted on 2016-12-08 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A ragman from 3 to 10 (in Word Problems)
Posted on 2016-12-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Moving Two Rooks (in Games)
Posted on 2016-12-06 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Four integers (in Numbers)
Posted on 2016-12-04 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Vieta's derivatives (in Just Math)
Posted on 2016-12-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A biased random walk (in Probability)
Posted on 2016-12-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 57+8=12 ?? (in Just Math) Rating: 3.00
Posted on 2016-11-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5composite function (in Calculus) Rating: 3.00
Posted on 2016-11-29 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Seven Hexominos and Two Triominos (in Shapes)
Posted on 2016-11-26 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 526 out of 50 (in Just Math) Rating: 4.00
Posted on 2016-11-25 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Prime repunits (in Numbers) Rating: 3.50
Posted on 2016-11-24 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5On the same floor (in Just Math)
Posted on 2016-11-22 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Terrific sequence 2 (in Sequences) Rating: 5.00
Posted on 2016-11-20 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Equal Areas on Circles (in Geometry)
Posted on 2016-11-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Maximizing the sum (in Numbers)
Posted on 2016-11-16 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A radical problem (in Just Math)
Posted on 2016-11-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Don't be confused (in General)
Posted on 2016-11-14 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5In terzo luogo (in Sequences)
Posted on 2016-11-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Linear*Quadratic = Square (in Just Math)
Posted on 2016-11-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Roots Ready to Relate (in Just Math) Rating: 4.00
Posted on 2016-11-06 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Covering a Rectangle with Hexominos (in Shapes)
Posted on 2016-11-05 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Hardest easy geometry problem (in Geometry) Rating: 4.00
Posted on 2016-11-04 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Your conclusion requested (in Logic) Rating: 3.67
Posted on 2016-11-03 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Matrix Mathematics (in Just Math)
Posted on 2016-10-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Ninth Hexomino (in Shapes)
Posted on 2016-10-28 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Rationality certification (in Just Math)
Posted on 2016-10-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Inequality challenge (in Just Math)
Posted on 2016-10-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Rectangle Evasion 2 (in Shapes)
Posted on 2016-10-23 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 3 of 5A little twist (in Just Math)
Posted on 2016-10-21 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5List of triplets (in Just Math)
Posted on 2016-10-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Dodecahedron Chance Determination (in Probability)
Posted on 2016-10-20 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Six Hexominos surrounding a Tetromino (in Shapes)
Posted on 2016-10-19 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Prove Phi's Peculiar Property (in Numbers)
Posted on 2016-10-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5get the real part of the problem (in Just Math)
Posted on 2016-10-16 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tile a Rectangle (in Shapes)
Posted on 2016-10-15 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 4 of 5this is the range of my root (in Just Math)
Posted on 2016-10-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Phibobrick's dimensions (in Numbers)
Posted on 2016-10-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5U-Hexominos and Squares (in Shapes)
Posted on 2016-10-12 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Adding consecutive primes (in Just Math)
Posted on 2016-10-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No Fault Coverage 2 (in Shapes)
Posted on 2016-10-10 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ratio Sum Equation (in Just Math)
Posted on 2016-10-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5polynomial problem 3 (in Just Math)
Posted on 2016-10-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Nine Hexominos in a Square (in Shapes)
Posted on 2016-10-07 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Covering a Square with Hexominos (in Shapes)
Posted on 2016-10-06 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Wrapping a Regular Hexagon (in Shapes)
Posted on 2016-10-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 52 sums modulo 7 (in Probability)
Posted on 2016-10-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Additional solutions, please (in Just Math)
Posted on 2016-10-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Prime problem (in Just Math)
Posted on 2016-10-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Collinearity proof (in Geometry)
Posted on 2016-10-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5polynomial problem 2 (in Just Math) Rating: 3.00
Posted on 2016-09-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Rectangle Evasion (in Shapes)
Posted on 2016-09-29 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Carfax (in General)
Posted on 2016-09-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Cryptajoke XVI (in Word Problems)
Posted on 2016-09-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5No data - just a weighing problem (in General) Rating: 5.00
Posted on 2016-09-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two Primes From Prime (in Just Math) Rating: 4.00
Posted on 2016-09-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cryptajoke XV (in Cryptography)
Posted on 2016-09-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Immobile Hexominos (in Shapes)
Posted on 2016-09-25 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Nineteen Divisibility Nuance (in Algorithms)
Posted on 2016-09-24 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Numbers' quantifiers (in Logic)
Posted on 2016-09-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A cyclic path (in Geometry)
Posted on 2016-09-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Easy sequence (in Sequences)
Posted on 2016-09-20 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Provide the next number (in Sequences)
Posted on 2016-09-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Eight Hexominos plus a Tetromino (in Shapes)
Posted on 2016-09-17 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Anamonics (in Word Problems)
Posted on 2016-09-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quadrilateral and Radius Query (in Shapes)
Posted on 2016-09-15 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Lattice Parallelogram and Point Poser (in Shapes)
Posted on 2016-09-14 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5The triple threat (in Tricks)
Posted on 2016-09-13 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 54 rebuses (in Word Problems)
Posted on 2016-09-12 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Sparse Packing a Zig-Zag (in Shapes)
Posted on 2016-09-11 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Lopsided T-Hexomino (in Shapes) Rating: 4.00
Posted on 2016-09-09 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Finding the hidden digit (in Tricks)
Posted on 2016-09-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Four weddings (in Word Problems)
Posted on 2016-09-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hexominos and Squares (in Shapes)
Posted on 2016-09-07 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Counting ARATs (in Numbers)
Posted on 2016-09-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Getting 189 (in Numbers)
Posted on 2016-09-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 5 of 5Sum to Cevian (in Geometry) Rating: 5.00
Posted on 2016-09-03 by Bractals (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Polygon Area Ponder (in Shapes)
Posted on 2016-09-01 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Empty or fool ?? (in Logic)
Posted on 2016-09-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Divisibility Property (in Numbers)
Posted on 2016-08-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Add missing letters (in Word Problems) Rating: 3.00
Posted on 2016-08-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Random Chess Pieces Poser (in Probability)
Posted on 2016-08-29 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5All rational numbers in (in Sequences)
Posted on 2016-08-26 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Powers of 3 (in Numbers)
Posted on 2016-08-25 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Eight Points (in Probability)
Posted on 2016-08-24 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Business is business (in Word Problems) Rating: 4.00
Posted on 2016-08-24 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Almost disjoint union (in Just Math)
Posted on 2016-08-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Estimate a percentage (in Numbers)
Posted on 2016-08-22 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Hexagon Hinder 3 (in Shapes)
Posted on 2016-08-21 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Concurrent Rays (in Geometry) Rating: 5.00
Posted on 2016-08-20 by Bractals (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Bananas travel (in General)
Posted on 2016-08-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Collinear Points (in Geometry) Rating: 4.00
Posted on 2016-08-19 by Bractals (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Covering a Cube with Strips (in Shapes)
Posted on 2016-08-18 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Guessing your birthdate (in Just Math)
Posted on 2016-08-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 54 groups of 4 (in Word Problems) Rating: 2.00
Posted on 2016-08-16 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Tilings of a Hexomino (in Shapes)
Posted on 2016-08-16 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 2 of 5240 divisors (in Just Math)
Posted on 2016-08-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Angle Ratio Ascertainment 6 (in Shapes)
Posted on 2016-08-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 51-2-3-4 Square (in Geometry) Rating: 4.00
Posted on 2016-08-12 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Sum of Consecutive Square Roots (in Just Math)
Posted on 2016-08-10 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Insect Jump Illation (in Just Math)
Posted on 2016-08-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Divisibility to Square II (in Just Math)
Posted on 2016-08-07 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Visiting Toronto (in Numbers)
Posted on 2016-08-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A spiral word (in Word Problems) Rating: 3.50
Posted on 2016-08-04 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Pandigital Multiples of 99 (in Numbers)
Posted on 2016-08-03 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Square angles (in Shapes)
Posted on 2016-08-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Weight Limited Bridge (in General)
Posted on 2016-08-01 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Mirror multiplication (in Numbers)
Posted on 2016-07-31 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Ball Series Insertion (in Weights and Scales)
Posted on 2016-07-29 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square in a Cone (in Shapes)
Posted on 2016-07-29 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A Tetrahedral Volume Puzzle (in Shapes) Rating: 3.00
Posted on 2016-07-28 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 515 Triominoes (in Shapes) Rating: 4.00
Posted on 2016-07-26 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A chain of command (in Just Math)
Posted on 2016-07-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Go back or double (in Sequences)
Posted on 2016-07-25 by Jer (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Five Pairs of Balls (in Weights and Scales)
Posted on 2016-07-22 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Random^3 x Random (in Probability)
Posted on 2016-07-21 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Cute numbers (in Numbers)
Posted on 2016-07-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Primes divide expression? (in Just Math)
Posted on 2016-07-20 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A square within a triangle (in Just Math)
Posted on 2016-07-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The First Repeat (in Probability)
Posted on 2016-07-18 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Denver is not the issue (in Word Problems)
Posted on 2016-07-18 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Right and Left Digits (in Just Math)
Posted on 2016-07-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Divisible by 19? (in Numbers)
Posted on 2016-07-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Consecutive Sums (in Numbers)
Posted on 2016-07-12 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Prove SG's theorem (in Just Math)
Posted on 2016-07-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Multiple Harshad Numbers (in Numbers)
Posted on 2016-07-10 by Jer (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Amicable pair generator (in Numbers)
Posted on 2016-07-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Not too high, not too low (in Just Math)
Posted on 2016-07-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find Counterexamples (in Numbers)
Posted on 2016-07-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sequence starting with 30 (in Numbers)
Posted on 2016-07-05 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Fibonacci yields Pythagoras (in Sequences)
Posted on 2016-07-05 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5S.O.D = cube root (in Numbers)
Posted on 2016-07-04 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Who said it? (in Cryptography)
Posted on 2016-07-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quadrilateral Area Query 2 (in Shapes)
Posted on 2016-07-03 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Lattice Vertices Verification (in Shapes)
Posted on 2016-07-02 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Line Length from Two Triangles (in Shapes)
Posted on 2016-07-01 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Pentagonal triple triangles (in Geometry)
Posted on 2016-07-01 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 54 numbers make 5 squares (in Numbers)
Posted on 2016-06-30 by Jer (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Fractions lead to Pythagoreans (in Numbers)
Posted on 2016-06-28 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Pandigital pattern (in Numbers)
Posted on 2016-06-28 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Skip to 4th power (in Numbers)
Posted on 2016-06-27 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Square Sum in Pairs (in Just Math)
Posted on 2016-06-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Angle Ratio Ascertainment 4 (in Shapes)
Posted on 2016-06-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Celsius- A Fahrenheit Multiple? (in Just Math)
Posted on 2016-06-21 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Three vowels (in Word Problems)
Posted on 2016-06-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Circle cuts (in Shapes)
Posted on 2016-06-20 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Go for the midpoint (in Geometry) Rating: 2.00
Posted on 2016-06-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Roman Numeral and Letter Insertion (in Word Problems)
Posted on 2016-06-17 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A transpogram (in Word Problems)
Posted on 2016-06-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Progressive probability (in Probability)
Posted on 2016-06-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Comparing two events (in Probability)
Posted on 2016-06-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Objective: Integer! (in Geometry)
Posted on 2016-06-14 by broll (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Duodecimal Digit Product and Number Puzzle (in Just Math)
Posted on 2016-06-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Real Variable Validation (in Just Math)
Posted on 2016-06-11 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Squared halves (in Numbers)
Posted on 2016-06-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Isosceles Leg Length (in Shapes)
Posted on 2016-06-09 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Random chord problem 2 (in Probability)
Posted on 2016-06-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Term Finding with Floor (in Sequences)
Posted on 2016-06-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Is the sum odd? (in Numbers)
Posted on 2016-06-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Matching pegs (in Probability)
Posted on 2016-06-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Twice 2 products (in Numbers)
Posted on 2016-06-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A recursive sequence (in Sequences)
Posted on 2016-06-06 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Random Sum Resolution (in Probability)
Posted on 2016-06-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Divisible by 96? (in Just Math)
Posted on 2016-06-05 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Power Sum Proposition (in Just Math)
Posted on 2016-06-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Save our souls (in Games) Rating: 4.00
Posted on 2016-06-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Three expressions - same value (in Just Math)
Posted on 2016-06-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5No fours on my odometer (in Just Math)
Posted on 2016-06-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5King on the run (in Just Math)
Posted on 2016-06-01 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Quadruple Digit Sum and Number Puzzle (in Just Math)
Posted on 2016-06-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Edge problem (in Geometry)
Posted on 2016-05-31 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Latin verse (in Word Problems)
Posted on 2016-05-31 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5List the expressionist numbers (in Numbers)
Posted on 2016-05-30 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Log Expression Exercise (in Just Math)
Posted on 2016-05-30 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Finding the fixes (in Numbers)
Posted on 2016-05-29 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Digit Sum Equation Puzzle (in Just Math)
Posted on 2016-05-28 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Power of 2 (in Numbers) Rating: 5.00
Posted on 2016-05-27 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Mark's itinerary (in Probability)
Posted on 2016-05-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Duodecimal Element Sum Settlement (in Just Math)
Posted on 2016-05-25 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Colored Candy Choice (in Probability)
Posted on 2016-05-25 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Wanted: gifted numbers (in Numbers)
Posted on 2016-05-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Laugh, USA (in General)
Posted on 2016-05-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 53 integers (in Just Math)
Posted on 2016-05-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Angle Ratio Ascertainment 3 (in Shapes)
Posted on 2016-05-22 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Gambler's policy (in Probability)
Posted on 2016-05-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A comprehensive list (in Word Problems) Rating: 3.00
Posted on 2016-05-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A direct count (in Famous Riddles) Rating: 3.00
Posted on 2016-05-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Grid exercise (in Just Math) Rating: 5.00
Posted on 2016-05-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A square problem (in Just Math)
Posted on 2016-05-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5AABBCCDD and Perfect Square (in Just Math)
Posted on 2016-05-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 1 of 5A cube with missing row (in Numbers)
Posted on 2016-05-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two distinct questions (in Just Math)
Posted on 2016-05-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Icosahedron addressed (in Geometry)
Posted on 2016-05-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Tanya's puzzle (in Logic) Rating: 4.00
Posted on 2016-05-10 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Terrific sequence (in Sequences) Rating: 5.00
Posted on 2016-05-10 by Math Man (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Polynomial of degree 3n (in Just Math) Rating: 4.00
Posted on 2016-05-07 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Crazy or Sane (in Numbers)
Posted on 2016-05-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Visiting each other (in Just Math)
Posted on 2016-05-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5First Term Finding (in Sequences)
Posted on 2016-05-04 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5You'll be surprised (in Numbers)
Posted on 2016-05-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Base Baffle (in Just Math)
Posted on 2016-05-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Is it true? (in Just Math) Rating: 3.00
Posted on 2016-05-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Four From Arithmetic and Geometric (in Sequences) Rating: 4.50
Posted on 2016-04-29 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Much of few is many (in Numbers)
Posted on 2016-04-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Think it over (in Logic)
Posted on 2016-04-27 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 52 diagonal sums (in Just Math)
Posted on 2016-04-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5TO and FRO (in Just Math) Rating: 3.00
Posted on 2016-04-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Draw a Line to Partition the Grid (in General)
Posted on 2016-04-25 by Brian Smith (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Integer Root Illation (in Just Math)
Posted on 2016-04-23 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5A clever promotion (in Cryptography) Rating: 5.00
Posted on 2016-04-21 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5An educated guess (in Probability)
Posted on 2016-04-18 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Proof requested (in Geometry)
Posted on 2016-04-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Three ways - same sum (in Numbers)
Posted on 2016-04-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 51 to 9 concatenation (in Numbers)
Posted on 2016-04-12 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The only odd untouchable (in Numbers)
Posted on 2016-04-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 52 equal sums (in Just Math)
Posted on 2016-04-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quadrilateral Area Query (in Shapes)
Posted on 2016-04-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5A Pythagorean triangle (in Numbers) Rating: 5.00
Posted on 2016-04-08 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Watching the Watch (in General) Rating: 4.00
Posted on 2016-04-08 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 536 forever (in Numbers)
Posted on 2016-04-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Find this number (in Numbers)
Posted on 2016-04-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Not a common alphametic (in Just Math)
Posted on 2016-04-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Look for 3 sevens (in Numbers)
Posted on 2016-04-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 54 partitions, same product (in Numbers)
Posted on 2016-03-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quartering a Square (in Shapes) Rating: 4.00
Posted on 2016-03-29 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Star-shaped polyominos (in Shapes)
Posted on 2016-03-28 by Jer (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Find Five Fractions (in Just Math) Rating: 4.00
Posted on 2016-03-27 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum from Arithmetic and Geometric (in Sequences) Rating: 5.00
Posted on 2016-03-24 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Double Reflection (in Geometry)
Posted on 2016-03-24 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Neighbors or not? (in Probability)
Posted on 2016-03-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Simultaneous Satisfaction III (in Just Math)
Posted on 2016-03-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Rational Value Validation (in Just Math)
Posted on 2016-03-20 by K Sengupta (No Solution Yet, 11 Comments)
Difficulty: 3 of 52 coins (in Probability)
Posted on 2016-03-18 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Never 0 mod 3 (in Probability)
Posted on 2016-03-17 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Find number and base (in Numbers) Rating: 5.00
Posted on 2016-03-17 by Bractals (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Set Me Up Again (in Numbers)
Posted on 2016-03-16 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Countable sets (in Just Math)
Posted on 2016-03-15 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 4 of 5To-day is Monday & a PIday (in Numbers)
Posted on 2016-03-14 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Hexagon in Complex Plane (in Shapes)
Posted on 2016-03-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Love is blind (in Numbers)
Posted on 2016-03-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Ring of triangles II (in Geometry)
Posted on 2016-03-10 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5More bouncing (in Geometry)
Posted on 2016-03-09 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quadrilateral and Cyclic Query (in Shapes)
Posted on 2016-03-06 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5The sum is a square (in Numbers)
Posted on 2016-03-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Matryoshka Nesting Primes (in Numbers)
Posted on 2016-03-03 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Ring of triangles I (in Geometry)
Posted on 2016-03-02 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Light Beam Reflection (in Shapes)
Posted on 2016-03-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 513 and 2 (in Numbers) Rating: 1.00
Posted on 2016-03-01 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Initial Term Illation (in Sequences)
Posted on 2016-02-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5In a bar (in Probability)
Posted on 2016-02-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Counting Ten Segment Paths (in General)
Posted on 2016-02-19 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 2 of 525 * 1 (in Just Math)
Posted on 2016-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Equal products and sums (in Just Math)
Posted on 2016-02-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 54 labeled coins (in Weights and Scales) Rating: 3.00
Posted on 2016-02-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Big difference (in Numbers)
Posted on 2016-02-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Proving a theorem (in Geometry) Rating: 3.00
Posted on 2016-02-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prove or disprove (in Numbers)
Posted on 2016-02-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Boxes galore (in Numbers)
Posted on 2016-02-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Optimal Order (in Sequences)
Posted on 2016-02-10 by broll (No Solution Yet, 5 Comments)
Difficulty: 2 of 5How high the moon tonight (in Numbers)
Posted on 2016-02-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Three in a row (in Numbers) Rating: 2.50
Posted on 2016-02-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Interesting representation (in Numbers) Rating: 5.00
Posted on 2016-02-08 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Coefficient From Roots (in Just Math)
Posted on 2016-02-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Fifty-fifty (in Just Math) Rating: 3.00
Posted on 2016-02-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5a version of NIM (in Games) Rating: 4.00
Posted on 2016-02-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Square in Pascal's triangle (in Just Math)
Posted on 2016-02-03 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Evaluate further probabilities (in Probability)
Posted on 2016-02-03 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Dascal triangle (in Numbers)
Posted on 2016-02-02 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Mille and Remainder Resolution (in Sequences)
Posted on 2016-02-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Maybe soon (in Numbers)
Posted on 2016-02-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tangents (in Geometry)
Posted on 2016-01-31 by Bractals (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Constant and Ratio Puzzle (in Just Math)
Posted on 2016-01-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5The real McCoy (in Weights and Scales)
Posted on 2016-01-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Erase the right 90 (in Numbers) Rating: 4.00
Posted on 2016-01-28 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5L, like in like (in Numbers)
Posted on 2016-01-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 55 cubes (in Numbers)
Posted on 2016-01-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Evaluate probabilities (in Probability)
Posted on 2016-01-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 582 in 82 (in Numbers)
Posted on 2016-01-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5LCM and Combination Conclusion (in Just Math)
Posted on 2016-01-23 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Three Power Verification (in Just Math)
Posted on 2016-01-20 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5You may name it (in Word Problems)
Posted on 2016-01-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Detect my chosen coin (in Games)
Posted on 2016-01-19 by Ady TZIDON (No Solution Yet, 19 Comments)
Difficulty: 3 of 59 coins prob (in Weights and Scales) Rating: 3.00
Posted on 2016-01-18 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Composite Integer Conclusion (in Just Math)
Posted on 2016-01-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Product equals sum (in Just Math) Rating: 2.00
Posted on 2016-01-17 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Area from Altitude (in Shapes)
Posted on 2016-01-16 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Family tree (in Logic) Rating: 5.00
Posted on 2016-01-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Expose ambiguity (in Logic) Rating: 3.00
Posted on 2016-01-13 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5GCD Relationships (in Just Math)
Posted on 2016-01-12 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Four balloons (in Just Math)
Posted on 2016-01-12 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sine in a Circle (in Shapes)
Posted on 2016-01-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A math symbol (in Numbers) Rating: 3.33
Posted on 2016-01-08 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Two hexagons (in Just Math)
Posted on 2016-01-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Integer Check Conclusion (in Just Math)
Posted on 2016-01-06 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Restricted Rook Runaround (in Games)
Posted on 2016-01-05 by Brian Smith (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Test #9 (in Word Problems)
Posted on 2016-01-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Floor and Square Division Settlement (in Just Math) Rating: 4.00
Posted on 2016-01-01 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Peaceful superqueens (in General)
Posted on 2015-12-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two related sequences (in Sequences)
Posted on 2015-12-30 by Jer (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Equiangular Hexagon Query (in Shapes) Rating: 4.00
Posted on 2015-12-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A five letter word (in Word Problems)
Posted on 2015-12-28 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5From pie to numbers (in Numbers) Rating: 3.00
Posted on 2015-12-27 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Triangle Area Ascertainment (in Shapes) Rating: 5.00
Posted on 2015-12-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Expression and Perfect Square 2 (in Just Math) Rating: 3.00
Posted on 2015-12-25 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Protecting the fleet Part E. (in Calculus) Rating: 4.00
Posted on 2015-12-23 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Power and Digit Poser (in Just Math)
Posted on 2015-12-23 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Run away (in Games) Rating: 3.00
Posted on 2015-12-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 55-2=1 (in Word Problems) Rating: 3.00
Posted on 2015-12-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Quadratic and Five Variable Query (in Just Math)
Posted on 2015-12-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 580 (in Numbers)
Posted on 2015-12-19 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Who said it? (in General)
Posted on 2015-12-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Real Equation Resolution (in Just Math)
Posted on 2015-12-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Distinct Triangle Determination (in Shapes)
Posted on 2015-12-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Protecting the fleet Parts C. & D. (in Geometry)
Posted on 2015-12-15 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Who's next (in Sequences)
Posted on 2015-12-15 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5A peculiar pandigital (in Numbers)
Posted on 2015-12-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Protecting the fleet Parts A. & B. (in Geometry)
Posted on 2015-12-14 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Using a standard deck (in Numbers)
Posted on 2015-12-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A peculiar triangular number (in Numbers)
Posted on 2015-12-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Hold your horses (in General) Rating: 5.00
Posted on 2015-12-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Show me the moNey (in Numbers) Rating: 3.00
Posted on 2015-12-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fibonaccish ratio (in Sequences) Rating: 3.00
Posted on 2015-12-07 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Reversible hours (in Shapes) Rating: 3.00
Posted on 2015-12-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Factorial Division (in Just Math)
Posted on 2015-12-04 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5List of pairs (in Just Math)
Posted on 2015-12-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Variety of divisors (in Numbers)
Posted on 2015-12-03 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Simple conclusion (in Just Math) Rating: 3.00
Posted on 2015-12-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Get the right product (in Just Math)
Posted on 2015-12-01 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Daylight Saving (in Cryptography) Rating: 5.00
Posted on 2015-12-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5No primes here (in Sequences) Rating: 5.00
Posted on 2015-11-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Table's peculiarity (in Just Math)
Posted on 2015-11-29 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Coin contest (in Games) Rating: 5.00
Posted on 2015-11-27 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Straightedge only (in Geometry)
Posted on 2015-11-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Root factorial (in Numbers)
Posted on 2015-11-25 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square in a notched square (in Geometry)
Posted on 2015-11-25 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Wise Russell (in Tricks) Rating: 5.00
Posted on 2015-11-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Generalizing II (in Sequences) Rating: 4.00
Posted on 2015-11-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadratic and Quartic Query 2 (in Just Math)
Posted on 2015-11-20 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Counting correctly (in Numbers)
Posted on 2015-11-19 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5If you go (in Numbers)
Posted on 2015-11-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Sum of powers (in Numbers)
Posted on 2015-11-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Upgrading procedure (in Just Math)
Posted on 2015-11-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Cryptajoke XII (in Cryptography) Rating: 4.33
Posted on 2015-11-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadratic and Cubic Query (in Just Math)
Posted on 2015-11-14 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 59-letter word II (in Sequences) Rating: 5.00
Posted on 2015-11-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 53c+2v (in Word Problems)
Posted on 2015-11-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Sphere Intersections (in Geometry)
Posted on 2015-11-11 by Bractals (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Count the palindromes (in Just Math)
Posted on 2015-11-11 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5….to skin a cat (in Logic)
Posted on 2015-11-09 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Cryptajoke XI (in Cryptography) Rating: 3.00
Posted on 2015-11-09 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Triangle's bisector theorem (in Geometry)
Posted on 2015-11-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Cons and vows (in Word Problems)
Posted on 2015-11-06 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Four factors (in Just Math)
Posted on 2015-11-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Matching pairs II (in Word Problems) Rating: 2.00
Posted on 2015-11-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5An interesting matrix (in Sequences)
Posted on 2015-11-05 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Incircle Points (in Shapes)
Posted on 2015-11-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Zero mod 3 (in Just Math)
Posted on 2015-11-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 510 4 7 10 (in Just Math)
Posted on 2015-11-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prediction (in Tricks)
Posted on 2015-11-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quadrilateral Side Query (in Shapes)
Posted on 2015-10-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Incredible, but solvable (in Just Math)
Posted on 2015-10-30 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 3 of 5No peace (in Word Problems)
Posted on 2015-10-29 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Make up your mind (in Word Problems)
Posted on 2015-10-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Some questions of abundance (in Just Math)
Posted on 2015-10-28 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A canonical representation (in Just Math)
Posted on 2015-10-27 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Numbered Letters IV (in Word Problems)
Posted on 2015-10-26 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Magic matrix (in Just Math)
Posted on 2015-10-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Must differ by 3 (in Just Math)
Posted on 2015-10-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Expression Ratio Limit (in Calculus)
Posted on 2015-10-22 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Extend the list (in Word Problems)
Posted on 2015-10-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5n-digit ... n-th power (in Numbers)
Posted on 2015-10-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Distinct Values Determination (in Just Math)
Posted on 2015-10-20 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Factorials & factorions (in Numbers) Rating: 5.00
Posted on 2015-10-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum Expression Value Determination (in Just Math) Rating: 3.00
Posted on 2015-10-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Generalizing (in Geometry)
Posted on 2015-10-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fly's schedule (in Just Math)
Posted on 2015-10-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Coefficient Determination (in Just Math)
Posted on 2015-10-14 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Same digits - 3 cubes (in Numbers)
Posted on 2015-10-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Count them correctly (in Numbers)
Posted on 2015-10-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Function Existence Exercise (in Just Math)
Posted on 2015-10-11 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Permutations count redux (in Numbers)
Posted on 2015-10-09 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Integer Function Finding (in Just Math)
Posted on 2015-10-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 58 digit rhyme (in Cryptography) Rating: 3.00
Posted on 2015-10-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Wise and nice (in Word Problems)
Posted on 2015-10-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Positive Integer Pair and Division Puzzle (in Just Math)
Posted on 2015-10-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5All are... (in Word Problems) Rating: 1.00
Posted on 2015-10-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Random Choice (in Probability)
Posted on 2015-10-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Nine forever (in Just Math) Rating: 4.00
Posted on 2015-09-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Get 010101 (in Logic) Rating: 3.00
Posted on 2015-09-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Missing members (in Sequences)
Posted on 2015-09-29 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Black and white socks (in Probability)
Posted on 2015-09-29 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Extreme Sum Settlement (in Just Math)
Posted on 2015-09-28 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Angle Ratio Ascertainment 2 (in Shapes)
Posted on 2015-09-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Families (in General) Rating: 3.00
Posted on 2015-09-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Quit as a winner (in Games) Rating: 5.00
Posted on 2015-09-24 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Integer Pair and Infinite Puzzle (in Just Math)
Posted on 2015-09-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Three Power and Product Divisibility (in Just Math)
Posted on 2015-09-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Marissa's and Melissa's birthdays (in Logic)
Posted on 2015-09-17 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5C reverses into F (in Numbers) Rating: 3.00
Posted on 2015-09-14 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Expression Divides Expression (in Just Math)
Posted on 2015-09-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fair? (in Games) Rating: 4.50
Posted on 2015-09-10 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Talk to me (in Just Math)
Posted on 2015-09-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Step right up! (in Games)
Posted on 2015-09-09 by Jer (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Three-syllable word (in Tricks)
Posted on 2015-09-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quadratic and Quartic Query (in Just Math) Rating: 4.00
Posted on 2015-09-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Surprising answer II (in Numbers) Rating: 4.00
Posted on 2015-09-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Six countries (in General) Rating: 3.00
Posted on 2015-09-04 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Surprising answer (in Probability)
Posted on 2015-09-02 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Ratio Sum Equals Positive Integer (in Just Math)
Posted on 2015-08-30 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Brick Packing Poser (in Shapes)
Posted on 2015-08-28 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A Fibo quadruplet (in Numbers)
Posted on 2015-08-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Be fruitful and multiply. (in Numbers) Rating: 3.00
Posted on 2015-08-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What am I ? (in Riddles)
Posted on 2015-08-27 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Divide et impera part two (in Numbers)
Posted on 2015-08-26 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Only 2 answers (in Numbers)
Posted on 2015-08-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Hockey pucks (in Logic)
Posted on 2015-08-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Date Count Conclusion II (in General) Rating: 5.00
Posted on 2015-08-24 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Equal differences (in Numbers)
Posted on 2015-08-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Visit USA (in General)
Posted on 2015-08-20 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5A self-working card trick (in Tricks)
Posted on 2015-08-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Role Models II (in Riddles)
Posted on 2015-08-18 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Infinite Triplet and Perfect Square (in Just Math) Rating: 3.00
Posted on 2015-08-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Positive Perfect Cube Sum (in Just Math)
Posted on 2015-08-15 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Wisecracks (in Word Problems)
Posted on 2015-08-12 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 1 of 5Simpler probability problem? (in Probability)
Posted on 2015-08-11 by Jer (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Ending in 5 (in Just Math)
Posted on 2015-08-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Oddday (in Numbers) Rating: 5.00
Posted on 2015-08-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Quadratic and Divisibility Puzzle (in Just Math)
Posted on 2015-08-09 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Real Number Resolution (in Just Math)
Posted on 2015-08-08 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Clever counting (in Numbers)
Posted on 2015-08-07 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Largest pandigital prime. (in Numbers)
Posted on 2015-08-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Odd and Even 2 (in Just Math)
Posted on 2015-08-03 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 526 letters needed (in Word Problems)
Posted on 2015-07-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ocean Anagram – Not (in Word Problems)
Posted on 2015-07-31 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Best guess (in Probability)
Posted on 2015-07-30 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Power Difference Puzzle (in Just Math)
Posted on 2015-07-30 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Pythagorean triplet generator (in Numbers) Rating: 5.00
Posted on 2015-07-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Digit Reversal Puzzle (in Just Math)
Posted on 2015-07-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Nine trolls (in Just Math) Rating: 3.00
Posted on 2015-07-23 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5One of the countries (in Word Problems)
Posted on 2015-07-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Initial Term Identification (in Sequences)
Posted on 2015-07-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5My travel II.....CIAO! (in General)
Posted on 2015-07-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Guessing suit (in Probability) Rating: 4.00
Posted on 2015-07-20 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Circumcenter, orthocenter and ratio puzzle (in Shapes)
Posted on 2015-07-19 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Side Ratio Resolution (in Shapes)
Posted on 2015-07-18 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Pasta wrestling (in Word Problems)
Posted on 2015-07-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Pieces of eight (in Just Math)
Posted on 2015-07-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Getting the right count (in Numbers) Rating: 3.00
Posted on 2015-07-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Bean coloring (in Probability) Rating: 4.50
Posted on 2015-07-13 by Jer (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Something is "some night" (in Word Problems)
Posted on 2015-07-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A powerful resemblance. (in Just Math) Rating: 5.00
Posted on 2015-07-12 by broll (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Long Reverse Rigor (in Word Problems)
Posted on 2015-07-10 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Inverse Quadratic Sum Puzzle (in Just Math)
Posted on 2015-07-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A radical question (in General)
Posted on 2015-07-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Inverse Expression Exercise (in Just Math)
Posted on 2015-07-07 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 58 (or more) states (in General)
Posted on 2015-07-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5From ab to yz (in Word Problems)
Posted on 2015-07-06 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Quartic Sum Determination (in Just Math)
Posted on 2015-07-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Simultaneous Pythagorean Poser (in Just Math)
Posted on 2015-07-04 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Primary problem III (in Numbers) Rating: 5.00
Posted on 2015-07-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Quite a triplet (in Numbers)
Posted on 2015-07-02 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Chinatown's problem (in Numbers)
Posted on 2015-07-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5One 1 to Six 6's (in Probability) Rating: 5.00
Posted on 2015-07-01 by Jer (No Solution Yet, 14 Comments)
Difficulty: 1 of 5Factorial creates prime (in Numbers)
Posted on 2015-06-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Four Distinct Points (in Geometry)
Posted on 2015-06-25 by Bractals (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Put up or shut up (in Word Problems)
Posted on 2015-06-23 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5 Find the lowest n (in Numbers)
Posted on 2015-06-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 53 primes (in Numbers)
Posted on 2015-06-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Taxation (in Numbers) Rating: 4.00
Posted on 2015-06-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Linear and Quadratic Puzzle (in Just Math)
Posted on 2015-06-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5One triplet out (in Numbers)
Posted on 2015-06-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Expression Quotient Puzzle (in Just Math)
Posted on 2015-06-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5On his way to fitness (in Just Math)
Posted on 2015-06-15 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Bivariate Quadratic Puzzle (in Just Math) Rating: 3.00
Posted on 2015-06-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Harmonic mean and constant determination puzzle (in Shapes) Rating: 4.00
Posted on 2015-06-13 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5p^10 is special (in Numbers)
Posted on 2015-06-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5It sounds Greek to me (in General) Rating: 5.00
Posted on 2015-06-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cube root sum equality puzzle (in Just Math)
Posted on 2015-06-09 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5No direct evaluation (in Numbers)
Posted on 2015-06-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A chain of five (in Word Problems)
Posted on 2015-06-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Concurrency and Ratio Product Puzzle (in Shapes)
Posted on 2015-06-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Find Points, Maximise Ratio (in Shapes) Rating: 4.00
Posted on 2015-06-05 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Quadratic and Sextic (in Just Math)
Posted on 2015-06-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 51270 *899 (in General)
Posted on 2015-06-02 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Number and Factorial Product Puzzle (in Just Math) Rating: 2.00
Posted on 2015-06-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5All that glitters (in Numbers)
Posted on 2015-05-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Rational or not? (in Just Math) Rating: 5.00
Posted on 2015-05-29 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A many chords problem (in Geometry)
Posted on 2015-05-27 by Jer (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Angle Ratio Ascertainment (in Shapes)
Posted on 2015-05-27 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sinusoidal System (in Just Math)
Posted on 2015-05-24 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Powered s.o.d. (in Numbers) Rating: 3.00
Posted on 2015-05-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5In a bar (in Logic)
Posted on 2015-05-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 57G vs 7B (in General)
Posted on 2015-05-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Random numbers sum together (in Probability)
Posted on 2015-05-15 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Euler on trial (in Numbers) Rating: 1.00
Posted on 2015-05-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5BOW, WRENCH (in Word Problems)
Posted on 2015-05-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5112233....99 scrambled (in Numbers)
Posted on 2015-05-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5A Quickie, not tricky (in Numbers)
Posted on 2015-05-11 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Positive Pair Poser (in Just Math) Rating: 4.00
Posted on 2015-05-09 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Short advice (in Cryptography)
Posted on 2015-05-08 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Cabbagehead’s neighbors (in Word Problems)
Posted on 2015-05-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Printer's glitch (in Just Math)
Posted on 2015-05-05 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5My friend (in Cryptography)
Posted on 2015-05-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Poor primes (in Numbers)
Posted on 2015-05-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Equality in pentagon (in Geometry) Rating: 3.00
Posted on 2015-05-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Real Functions Determination (in Just Math) Rating: 4.00
Posted on 2015-05-02 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Catch as you catch can (in Numbers)
Posted on 2015-05-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cyclic Hexagon Hindrance (in Shapes)
Posted on 2015-04-29 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Odd men out (in Logic)
Posted on 2015-04-29 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Largest palindrome (in Numbers)
Posted on 2015-04-27 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Is it possible? (in Famous Riddles) Rating: 4.00
Posted on 2015-04-27 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Seventeen divides expression? (in Just Math)
Posted on 2015-04-26 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Divisor Determination (in Just Math)
Posted on 2015-04-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Not solvable by computer (?) (in Word Problems)
Posted on 2015-04-24 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Consecutive Count (in Sequences)
Posted on 2015-04-23 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5XX=? (in General)
Posted on 2015-04-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Island Adventure 2 (in Liars and Knights) Rating: 3.00
Posted on 2015-04-21 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Geographic entities (in General) Rating: 3.00
Posted on 2015-04-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5N as a sum of factorials (in Just Math)
Posted on 2015-04-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Arithmetic Quadrilateral (in Shapes)
Posted on 2015-04-19 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A Chinese Scene (in Word Problems)
Posted on 2015-04-17 by broll (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Some powers decomposed (in Numbers)
Posted on 2015-04-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Famous movie quotations (in General) Rating: 3.00
Posted on 2015-04-14 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5So what? (in General)
Posted on 2015-04-13 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Tile flipping (in Just Math) Rating: 4.00
Posted on 2015-04-08 by Jer (No Solution Yet, 12 Comments)
Difficulty: 1 of 5Vive la petite différence! (in Paradoxes) Rating: 4.00
Posted on 2015-04-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Buddy, can you spare a buck? (in Numbers)
Posted on 2015-04-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Domain and Range (in Just Math)
Posted on 2015-04-02 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Case of the Mixtup Calendar (in General) Rating: 4.00
Posted on 2015-04-02 by broll (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reflection Matrix (in Just Math)
Posted on 2015-04-01 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Nine times SSD (in Just Math)
Posted on 2015-03-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5How many solutions? (in Just Math)
Posted on 2015-03-30 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Distinct Solution Decision (in Just Math)
Posted on 2015-03-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Neighboring tickets (in Numbers) Rating: 4.00
Posted on 2015-03-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Island Adventure (in Liars and Knights) Rating: 3.00
Posted on 2015-03-26 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Win some, lose some II (in Just Math)
Posted on 2015-03-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Long list (in Word Problems)
Posted on 2015-03-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A State of Contradictions (in Word Problems)
Posted on 2015-03-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Growing fast (in Numbers)
Posted on 2015-03-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Phrase a question III (in Word Problems)
Posted on 2015-03-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Polynomial problem (in Just Math)
Posted on 2015-03-22 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rectangular Rearrangement Resolution (in Shapes) Rating: 3.00
Posted on 2015-03-20 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5123456789 scrambled (in Numbers)
Posted on 2015-03-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5+Q-U : Quite Unusual (in Word Problems)
Posted on 2015-03-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pentagon Fraction Minimizing (in Just Math) Rating: 3.50
Posted on 2015-03-16 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Sum Root Concern (in Just Math) Rating: 3.00
Posted on 2015-03-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5A Quickie (in Numbers)
Posted on 2015-03-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Location, location, location (in Geometry) Rating: 4.00
Posted on 2015-03-12 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Squeeze between neighbors (in Numbers)
Posted on 2015-03-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Root sum equals integer (in Just Math)
Posted on 2015-03-10 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Triangle to Triangle (in General)
Posted on 2015-03-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Painting high dimension cubes (in Shapes)
Posted on 2015-03-05 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Find the last member (in Sequences)
Posted on 2015-03-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Minimizing Perimeter (in Shapes)
Posted on 2015-03-04 by Danish Ahmed Khan (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Contradict Goldbach (in Numbers) Rating: 1.00
Posted on 2015-03-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Phrase a question II (in Numbers) Rating: 2.00
Posted on 2015-03-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Equilateral fun (in Geometry)
Posted on 2015-02-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Back to the Bard (in Cryptography)
Posted on 2015-02-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Prime and perfect (in Numbers)
Posted on 2015-02-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Next year vs the current year (in Numbers) Rating: 4.00
Posted on 2015-02-25 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5No other case (in Just Math)
Posted on 2015-02-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Be consistent (in Numbers) Rating: 5.00
Posted on 2015-02-20 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Not too much (in Numbers)
Posted on 2015-02-20 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Double a triangle (in Sequences)
Posted on 2015-02-19 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Repeated Words (in Word Problems)
Posted on 2015-02-19 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A modified die (in Numbers)
Posted on 2015-02-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5The final quantity (in Numbers)
Posted on 2015-02-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Approximating radicals (in Numbers) Rating: 4.00
Posted on 2015-02-17 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5z is a word (in Word Problems)
Posted on 2015-02-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Phrase a question I (in Numbers)
Posted on 2015-02-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Integer Identification (in Just Math) Rating: 3.50
Posted on 2015-02-14 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5An ancient Egyptian problem (in Just Math)
Posted on 2015-02-13 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Bound the product (in Numbers)
Posted on 2015-02-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Date Deduction II (in General)
Posted on 2015-02-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Crime to Meditation (in Word Problems)
Posted on 2015-02-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Inequality (in Just Math)
Posted on 2015-02-11 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Shared by squares (in Algorithms) Rating: 4.00
Posted on 2015-02-10 by Jer (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Possibility of restoring (in Just Math) Rating: 3.00
Posted on 2015-02-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A simple gematria (in Numbers) Rating: 5.00
Posted on 2015-02-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The LSD of Prime Numbers (in Numbers)
Posted on 2015-02-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Minding mines. (in Just Math)
Posted on 2015-02-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Very very colourful (in General)
Posted on 2015-02-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Some special sums (in Numbers)
Posted on 2015-02-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Mr Mar & Mrs Bles (in Numbers) Rating: 3.00
Posted on 2015-02-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Palindromes from Digit Sum Series (in Numbers) Rating: 3.00
Posted on 2015-02-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Happy Numbers (in Numbers) Rating: 3.00
Posted on 2015-02-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Quite a normal question (in Riddles) Rating: 5.00
Posted on 2015-02-02 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Real Value Validation (in Just Math)
Posted on 2015-02-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Ellis Number (in Numbers)
Posted on 2015-01-31 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Integer Triplets with a Difference (in Numbers)
Posted on 2015-01-30 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A Self-Terminating Sequence (in Numbers)
Posted on 2015-01-29 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Date Count Conclusion (in General)
Posted on 2015-01-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5ProSum Numbers (in Numbers)
Posted on 2015-01-28 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Integral Proof (in Numbers)
Posted on 2015-01-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5 Observe and prove (in Just Math)
Posted on 2015-01-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Trigo - 24 (in Just Math)
Posted on 2015-01-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Final Minus Two (in Just Math)
Posted on 2015-01-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Eliot Ness meets Paul Erdős (in Numbers) Rating: 3.00
Posted on 2015-01-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Power Expression, Prime? (in Just Math) Rating: 3.00
Posted on 2015-01-22 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5What price glory? (in Games)
Posted on 2015-01-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Not hehe (in Word Problems)
Posted on 2015-01-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Easy as One, Two, Three (in Numbers)
Posted on 2015-01-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Occam's Razor (in Logic)
Posted on 2015-01-19 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 54 clues (in Numbers)
Posted on 2015-01-19 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Possible or not? (in Just Math) Rating: 4.00
Posted on 2015-01-17 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Three conditions define a triplet (in Just Math)
Posted on 2015-01-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Potato puzzle (in Riddles)
Posted on 2015-01-13 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Derivative Point Determination (in Calculus)
Posted on 2015-01-08 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 1 of 5Next one(s), please (in Sequences) Rating: 4.00
Posted on 2015-01-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5More than a million, less than ten (in Just Math)
Posted on 2015-01-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Dates data distribution (in Just Math)
Posted on 2015-01-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Triangle Perimeter and Semi-Perimeter (in Shapes) Rating: 4.00
Posted on 2015-01-04 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Angle Ascertainment (in Just Math)
Posted on 2015-01-03 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Match 3 Game (in General)
Posted on 2015-01-02 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A simple inequality (in Just Math)
Posted on 2014-12-31 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Neither is prime (in Just Math) Rating: 3.00
Posted on 2014-12-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sport Surmise (in Cryptography) Rating: 2.50
Posted on 2014-12-29 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Pentagon's constant (in Geometry) Rating: 4.00
Posted on 2014-12-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Origamic Revisited (in Shapes)
Posted on 2014-12-19 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5m & n (in Just Math)
Posted on 2014-12-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Solve in integers (in Just Math)
Posted on 2014-12-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cash and chit (in General)
Posted on 2014-12-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Extreme Cardioid Exercise (in Shapes)
Posted on 2014-12-14 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Extreme Ellipse Exercise (in Shapes)
Posted on 2014-12-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Tic-tac-toe related (in Logic) Rating: 2.00
Posted on 2014-12-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Trigo inequality (in Just Math)
Posted on 2014-12-11 by Danish Ahmed Khan (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Which is which (in Cryptography) Rating: 4.00
Posted on 2014-12-10 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Eight distances (in Just Math) Rating: 4.00
Posted on 2014-12-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Out of this word (in Word Problems)
Posted on 2014-12-08 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Going North-East (in Just Math)
Posted on 2014-12-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5What not? (in General)
Posted on 2014-12-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Extraordinaire (in General) Rating: 2.33
Posted on 2014-11-25 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Harmonic Power Treat (in Just Math)
Posted on 2014-11-22 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two cities + (in Cryptography) Rating: 4.00
Posted on 2014-11-21 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5To a fifth of the wind, that pierces us most (in Famous Riddles)
Posted on 2014-11-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Minimum Value Muse 2 (in Just Math)
Posted on 2014-11-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Real Resolution II (in Just Math)
Posted on 2014-11-18 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Missions impossible (in Just Math)
Posted on 2014-11-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Identical Digit Determination (in Just Math)
Posted on 2014-11-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Survival Surmise (in Logic)
Posted on 2014-11-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Hours of Operation (in Numbers) Rating: 3.00
Posted on 2014-11-12 by Paul (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Austria or Italy ? (in Just Math)
Posted on 2014-11-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Composite Sum Satisfaction (in Just Math) Rating: 5.00
Posted on 2014-11-11 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5M-D Sequences (in Just Math)
Posted on 2014-11-09 by Bractals (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Arrival Appraisal (in Science)
Posted on 2014-11-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Balancing weights (in Weights and Scales) Rating: 3.00
Posted on 2014-11-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Box Volume Baffle (in Shapes) Rating: 3.00
Posted on 2014-11-05 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Pokemon (in Sequences)
Posted on 2014-11-05 by Math Man (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Quadrilateral Quandary (in Shapes)
Posted on 2014-11-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inscribed Pentagon Illation (in Shapes)
Posted on 2014-11-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Friendship paradox (in Paradoxes) Rating: 4.00
Posted on 2014-10-31 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Chairs galore (in Just Math)
Posted on 2014-10-31 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Reply to this (in Just Math)
Posted on 2014-10-30 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Angle evaluating (in Geometry)
Posted on 2014-10-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Analyzing change (in Just Math) Rating: 3.00
Posted on 2014-10-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Hat #9 (in Word Problems)
Posted on 2014-10-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Word Containment Contemplation (in Word Problems)
Posted on 2014-10-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Area Ascertainment II (in Shapes) Rating: 4.00
Posted on 2014-10-24 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Curious concatenations (in Numbers)
Posted on 2014-10-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Extending tic-tac-toe (in Just Math)
Posted on 2014-10-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5 Beaujolais Nouveau Day (in Probability) Rating: 4.00
Posted on 2014-10-22 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Distinct Decimal Digits (in Numbers) Rating: 4.00
Posted on 2014-10-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cuisine Conclusion II (in Word Problems) Rating: 5.00
Posted on 2014-10-20 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5What is missing? (in Sequences)
Posted on 2014-10-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Half odd, half even (in Numbers)
Posted on 2014-10-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Reverse Role (in Just Math) Rating: 3.00
Posted on 2014-10-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5My products (in General)
Posted on 2014-10-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Ternary Sum Travail (in Probability)
Posted on 2014-10-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Open, Sesame! (in Probability) Rating: 2.00
Posted on 2014-10-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A versatile number (in Numbers) Rating: 5.00
Posted on 2014-10-13 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Greatest GCD (in Sequences)
Posted on 2014-10-12 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Optimal location (in Just Math)
Posted on 2014-10-10 by Art M (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A happy trio (in Probability)
Posted on 2014-10-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Minimum value with 75 (in Just Math) Rating: 2.50
Posted on 2014-10-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Draw and go (in Probability)
Posted on 2014-10-08 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Counting Crossings (in Geometry) Rating: 4.00
Posted on 2014-10-08 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Floor Sum Formulation (in Just Math)
Posted on 2014-10-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hyperbola Axes Hinder (in Shapes) Rating: 4.00
Posted on 2014-10-03 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Recruiting Crisis (in Algorithms) Rating: 3.00
Posted on 2014-10-03 by Dustin (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Defrosting the Cone (in Calculus) Rating: 3.00
Posted on 2014-10-02 by Larry (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Why and when (in General) Rating: 5.00
Posted on 2014-10-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Get them up (in Just Math) Rating: 4.00
Posted on 2014-10-01 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Consecutive Conclusion (in Just Math) Rating: 3.00
Posted on 2014-09-30 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 2 of 5X L's from rolling TdL (in Probability) Rating: 3.00
Posted on 2014-09-30 by Dustin (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Cubic Minimum (in Just Math)
Posted on 2014-09-26 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Moving target (in Shapes)
Posted on 2014-09-25 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rectangle Color Rigor (in Just Math) Rating: 3.00
Posted on 2014-09-23 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Once a Liar, always a Liar 3 (in Logic) Rating: 4.00
Posted on 2014-09-21 by Dustin (No Solution Yet, 11 Comments)
Difficulty: 2 of 5A Monotonous Menu (in General) Rating: 3.00
Posted on 2014-09-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 51 to 8 in 5*5 grid (in Word Problems)
Posted on 2014-09-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Adding to rolls (in Probability)
Posted on 2014-09-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Distinct Value Deduction (in Just Math) Rating: 5.00
Posted on 2014-09-14 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Cubic Quandary (in Calculus) Rating: 4.00
Posted on 2014-09-13 by Dustin (No Solution Yet, 2 Comments)
Difficulty: 3 of 54 cents (in Shapes)
Posted on 2014-09-12 by Jer (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Inherited Veracity II (in Liars and Knights) Rating: 5.00
Posted on 2014-09-12 by Dustin (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Test #6 (in General)
Posted on 2014-09-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Comparing weights (in Weights and Scales) Rating: 4.00
Posted on 2014-09-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Beach Baffle (in Logic)
Posted on 2014-09-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Sequence of subsets (in Just Math)
Posted on 2014-09-06 by Bractals (No Solution Yet, 0 Comments)
Difficulty: 3 of 52 pandigital equations (in Numbers)
Posted on 2014-09-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Angle Analysis (in Shapes)
Posted on 2014-09-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5World War I sword (in Riddles)
Posted on 2014-09-02 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cuboid Diagonal Conclusion (in Shapes) Rating: 5.00
Posted on 2014-09-01 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Triangular Triangulation (in Just Math)
Posted on 2014-08-30 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 53 cents (in Shapes)
Posted on 2014-08-29 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Distinct Products (in Just Math)
Posted on 2014-08-28 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5A PowerSum Puzzle (in Numbers)
Posted on 2014-08-27 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Concavity (in Calculus) Rating: 4.00
Posted on 2014-08-26 by Dustin (No Solution Yet, 2 Comments)
Difficulty: 1 of 5A world cup problem (in Probability) Rating: 1.50
Posted on 2014-08-26 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Stranger Danger (in Famous Riddles) Rating: 3.00
Posted on 2014-08-25 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5 Trigonometric progression (in Just Math)
Posted on 2014-08-24 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Real Cyclic Quad (in Geometry) Rating: 1.50
Posted on 2014-08-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Three tasks (in Just Math)
Posted on 2014-08-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Crazy clues (in General)
Posted on 2014-08-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Grandma's age (in Just Math) Rating: 2.00
Posted on 2014-08-20 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Crossnumber IV (in General) Rating: 1.50
Posted on 2014-08-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Six tangents (in Just Math)
Posted on 2014-08-17 by Danish Ahmed Khan (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Three subsets (in Just Math) Rating: 5.00
Posted on 2014-08-15 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 2 of 5Quadruplet Query (in Just Math) Rating: 3.00
Posted on 2014-08-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pandigital Ponder (in Just Math)
Posted on 2014-08-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Test #3 (in General) Rating: 4.00
Posted on 2014-08-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Some Triangles Sum 2014 (in Just Math)
Posted on 2014-08-12 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Octahedron Vertex Ponder (in Probability) Rating: 4.00
Posted on 2014-08-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Coefficient Conclusion (in Just Math)
Posted on 2014-08-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Members' quorum (in Numbers)
Posted on 2014-08-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tiling Trial II (in Shapes)
Posted on 2014-08-06 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Identity Satisfaction (in Just Math)
Posted on 2014-08-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Done? No need? ...UNDO! (in Word Problems)
Posted on 2014-08-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Test #2 (in General) Rating: 3.00
Posted on 2014-08-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Palindrome Ponder (in Just Math)
Posted on 2014-08-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sixes and Sevens (in Just Math)
Posted on 2014-08-02 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Mnemonics (in General)
Posted on 2014-08-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Log Divisor Sum (in Just Math) Rating: 3.00
Posted on 2014-08-01 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Isolated Number Illation (in Just Math)
Posted on 2014-07-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Square Squares Settlement (in Shapes)
Posted on 2014-07-30 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Date Disclosure (in General)
Posted on 2014-07-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Triangle Texture (in Shapes)
Posted on 2014-07-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The decisive straw (in Probability)
Posted on 2014-07-25 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Orange Outlook (in Just Math)
Posted on 2014-07-22 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Pentagon in a Circle (in Shapes)
Posted on 2014-07-19 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Proportion Description (in Shapes)
Posted on 2014-07-16 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5n2m or m2n ? (in Just Math)
Posted on 2014-07-16 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Union of squares (in Shapes) Rating: 3.00
Posted on 2014-07-09 by Jer (No Solution Yet, 10 Comments)
Difficulty: 2 of 5 Generating a square (in Just Math)
Posted on 2014-07-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two Oblate Spheroids (in Shapes)
Posted on 2014-07-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Base Conversion Conclusion (in Algorithms)
Posted on 2014-07-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An equation (in Just Math)
Posted on 2014-07-03 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Some dinner! (in Cryptography) Rating: 3.00
Posted on 2014-06-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Floor Prime? (in Just Math)
Posted on 2014-06-28 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Leonardo's game (in Games)
Posted on 2014-06-27 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Weather Wangle (in Word Problems)
Posted on 2014-06-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Fibo again (in Numbers)
Posted on 2014-06-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5F. to P. generator (in Numbers) Rating: 5.00
Posted on 2014-06-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5scitemahpla II (in Word Problems) Rating: 2.00
Posted on 2014-06-25 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5An enchanted coin (in Probability)
Posted on 2014-06-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Age Ascertainment V (in Logic) Rating: 2.33
Posted on 2014-06-23 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 52+2=4 is true (in Just Math)
Posted on 2014-06-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Taking the Fifth (in Just Math)
Posted on 2014-06-21 by broll (No Solution Yet, 5 Comments)
Difficulty: 3 of 53 more hats II (in General)
Posted on 2014-06-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Minimum Value Muse (in Just Math)
Posted on 2014-06-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Date cubes ENUMERATION (in Sequences)
Posted on 2014-06-19 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Diagram Dilemma (in Just Math) Rating: 1.00
Posted on 2014-06-19 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A tall tower (in Geometry)
Posted on 2014-06-18 by Jer (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Validity Vindication (in Shapes)
Posted on 2014-06-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reptile Resolution (in Word Problems)
Posted on 2014-06-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Arithmetic Grid II (in Just Math)
Posted on 2014-06-12 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Temperature Travail (in Logic) Rating: 1.00
Posted on 2014-06-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The mad hatter (in Word Problems)
Posted on 2014-06-09 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Performer Resolution II (in Cryptography)
Posted on 2014-06-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cardboard Conclusion (in Shapes) Rating: 3.00
Posted on 2014-06-08 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Yankee dollar (in Just Math)
Posted on 2014-06-06 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Non Sloane Muse (in Sequences)
Posted on 2014-06-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Four Digit Trial (in Just Math)
Posted on 2014-06-05 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Elementary is easy (in Sequences)
Posted on 2014-06-04 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Sum Settlement (in Just Math)
Posted on 2014-06-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Fuel Feat (in Just Math)
Posted on 2014-06-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Safe Crack II (in Just Math)
Posted on 2014-06-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ninety nine coins plus one catch (in Weights and Scales)
Posted on 2014-06-01 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Arithmetic Grid (in Just Math) Rating: 5.00
Posted on 2014-05-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inverse Square Sum (in Just Math) Rating: 1.00
Posted on 2014-05-28 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Floor Limit (in Calculus)
Posted on 2014-05-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Eight Embodiment (in Just Math) Rating: 4.00
Posted on 2014-05-25 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Bricks and Box Baffle (in Shapes)
Posted on 2014-05-23 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Harmonic Sequence Settlement (in Just Math)
Posted on 2014-05-22 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Integer Divisibility Dilemma II (in Just Math) Rating: 3.00
Posted on 2014-05-22 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Antonym Ascertainment II (in General) Rating: 5.00
Posted on 2014-05-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Array Assignment (in Just Math)
Posted on 2014-05-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Side Length Settlement (in Shapes)
Posted on 2014-05-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Make one hundred (in Numbers) Rating: 5.00
Posted on 2014-05-17 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Guessing Game (in Numbers) Rating: 5.00
Posted on 2014-05-16 by tomarken (No Solution Yet, 19 Comments)
Difficulty: 3 of 5Expected of each (in Probability)
Posted on 2014-05-15 by Jer (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Sequence containing itself (in Numbers)
Posted on 2014-05-14 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quiz Score Settlement (in Liars and Knights) Rating: 2.33
Posted on 2014-05-13 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Expected Smaller (in Probability)
Posted on 2014-05-12 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Marriage Muse II (in Logic)
Posted on 2014-05-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Repdigit Rigor (in Just Math)
Posted on 2014-05-11 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Baby Blue (in Probability) Rating: 3.50
Posted on 2014-05-08 by tomarken (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Mobile Phone Muse (in Logic)
Posted on 2014-05-05 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A Chamsonel Problem VI (in Liars and Knights)
Posted on 2014-05-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Making a Multiple of Four (in Numbers)
Posted on 2014-04-30 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Inscribed Circle (in Shapes)
Posted on 2014-04-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fold Judgement III (in Shapes) Rating: 4.00
Posted on 2014-04-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Wallet Wangle (in Liars and Knights) Rating: 5.00
Posted on 2014-04-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Veracity Verification III (in Logic) Rating: 3.00
Posted on 2014-04-23 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Odd and Even (in Just Math)
Posted on 2014-04-23 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Limiting Ratio II (in Calculus)
Posted on 2014-04-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Odd numbers (in Numbers)
Posted on 2014-04-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5No way to win (in General)
Posted on 2014-04-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Murderer Detection (in Riddles) Rating: 3.00
Posted on 2014-04-17 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cubic Sequence? (in Sequences)
Posted on 2014-04-16 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mod 3 alphametics (in Just Math)
Posted on 2014-04-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Pseudo-FIBO (in Sequences)
Posted on 2014-04-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Question Quandary (in Logic) Rating: 3.00
Posted on 2014-04-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5The right subset (in Word Problems)
Posted on 2014-04-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Geometric Sequence Settlement II (in Just Math) Rating: 3.00
Posted on 2014-04-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Four Cards (in Logic)
Posted on 2014-04-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Family Murder Muse (in Logic)
Posted on 2014-04-09 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5A Quicky III (in Numbers) Rating: 5.00
Posted on 2014-04-09 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5No-primes sequence (in Numbers)
Posted on 2014-04-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fold Ratio (in Shapes)
Posted on 2014-04-05 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Directly from Lucas (in Sequences)
Posted on 2014-04-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reverse Rigor (in Just Math)
Posted on 2014-04-04 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Intriguing Integral Illation II (in Calculus)
Posted on 2014-04-03 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5A Quicky II (in Numbers)
Posted on 2014-04-03 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Singer Settlement II (in General)
Posted on 2014-04-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fold Judgement II (in Shapes)
Posted on 2014-04-01 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Wooden Wangle (in Logic)
Posted on 2014-03-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Divisible by 27? (in Just Math)
Posted on 2014-03-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Ternary train (in Just Math)
Posted on 2014-03-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5In or out? (in Probability)
Posted on 2014-03-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Primes vs ones (in Numbers)
Posted on 2014-03-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A Chamsonel Problem V (in Liars and Knights) Rating: 2.50
Posted on 2014-03-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Harmless? (in General)
Posted on 2014-03-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Same Six Digits (in Just Math)
Posted on 2014-03-26 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Words count (in Numbers)
Posted on 2014-03-25 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5How high? (in Numbers) Rating: 4.00
Posted on 2014-03-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Factorial-Square Sum (in Just Math)
Posted on 2014-03-23 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Bargain Baffle (in Logic) Rating: 2.00
Posted on 2014-03-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Solution or solutions (in Sequences)
Posted on 2014-03-20 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Word Wangle (in Word Problems)
Posted on 2014-03-20 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Town Trends (in Logic)
Posted on 2014-03-19 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5About two and seven (in Numbers)
Posted on 2014-03-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5House Assignment (in Logic)
Posted on 2014-03-18 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum Divisibility Dilemma (in Just Math)
Posted on 2014-03-18 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Safe Crack (in Just Math) Rating: 3.00
Posted on 2014-03-17 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Summing the factorials (in Numbers)
Posted on 2014-03-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5The famous card players (in General)
Posted on 2014-03-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Bridge Baffle (in Just Math)
Posted on 2014-03-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prime Equation (in Just Math)
Posted on 2014-03-12 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5House Identification (in Logic)
Posted on 2014-03-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5A permuted multiplication (in Numbers)
Posted on 2014-03-11 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Store Stopover (in Logic)
Posted on 2014-03-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Some Powers Sum Power (in Just Math)
Posted on 2014-03-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Capital City Conclusion (in General) Rating: 3.00
Posted on 2014-03-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Bet Brood (in Probability)
Posted on 2014-03-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Equilateral Crease II (in Shapes)
Posted on 2014-03-05 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A partial deck (in Numbers)
Posted on 2014-03-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Formula Formulation (in Just Math)
Posted on 2014-03-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Day-knights and night-knights 8 (in Logic)
Posted on 2014-03-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Minimizing Trigo value (in Numbers) Rating: 4.00
Posted on 2014-03-02 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Switching Teams (in Probability) Rating: 4.00
Posted on 2014-02-28 by tomarken (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Minimum Integer (in Just Math)
Posted on 2014-02-28 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Reverso (in Numbers)
Posted on 2014-02-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Special polygon (in Shapes)
Posted on 2014-02-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5sum Up (in Numbers)
Posted on 2014-02-26 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Bullseye II (in Logic)
Posted on 2014-02-25 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Neighbor Ponder (in Liars and Knights)
Posted on 2014-02-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Riding the time machine (in General)
Posted on 2014-02-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5All Odds (in Numbers)
Posted on 2014-02-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Penta-Quadratic (in Just Math) Rating: 4.00
Posted on 2014-02-23 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Overlapping Triangles (in Geometry)
Posted on 2014-02-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Naturally Geometric (in Just Math)
Posted on 2014-02-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5More mean median mode (in Just Math)
Posted on 2014-02-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Absolutely Greatest II (in Just Math) Rating: 3.00
Posted on 2014-02-20 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Mean = median (in Just Math)
Posted on 2014-02-20 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Musicians (in Logic)
Posted on 2014-02-19 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Get a good look (in Calculus)
Posted on 2014-02-18 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Crime Commitment Conclusion III (in Logic)
Posted on 2014-02-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The Equiangular Hexagon (in Geometry)
Posted on 2014-02-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Six sets (in Numbers)
Posted on 2014-02-17 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Red Area (in Shapes)
Posted on 2014-02-16 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Equal areas (in Geometry)
Posted on 2014-02-15 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What did I miss? (in Just Math)
Posted on 2014-02-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Staircase tilings (in Shapes)
Posted on 2014-02-13 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Will Wangle (in Just Math)
Posted on 2014-02-13 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Detective Deduction (in General) Rating: 5.00
Posted on 2014-02-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Largest Overlapped Area (in Shapes)
Posted on 2014-02-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Remove last three to get cube root (in Numbers)
Posted on 2014-02-11 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Do you like mushrooms? (in General) Rating: 3.00
Posted on 2014-02-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quiz Results III (in Logic)
Posted on 2014-02-10 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Cards In A Circle (in General) Rating: 3.00
Posted on 2014-02-09 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reciprocal composition is reciprocal. (in Just Math)
Posted on 2014-02-08 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Primes square (in Just Math) Rating: 3.00
Posted on 2014-02-07 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Area Ascertainment (in Shapes)
Posted on 2014-02-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An after-dinner enigma (in Just Math)
Posted on 2014-02-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A Skirmish (in Logic)
Posted on 2014-02-05 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 53 after 4 (in Sequences)
Posted on 2014-02-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5My crazy die (in Probability)
Posted on 2014-02-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Smallest Integer Determination (in Just Math) Rating: 5.00
Posted on 2014-02-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Bisection In a triangle (in Geometry)
Posted on 2014-02-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Deduction Problem (in Numbers)
Posted on 2014-01-31 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pumpkins 4 (in Weights and Scales) Rating: 4.00
Posted on 2014-01-31 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Four special squares (in Numbers)
Posted on 2014-01-30 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5A Tetrahedron (in General) Rating: 3.00
Posted on 2014-01-30 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Passing On A Track (in Just Math) Rating: 3.00
Posted on 2014-01-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Lets Concatenate (in Just Math)
Posted on 2014-01-28 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Potluck Dinner (in Logic)
Posted on 2014-01-27 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5N & n (in Just Math)
Posted on 2014-01-27 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 53 INCIRCLES (in Geometry) Rating: 3.00
Posted on 2014-01-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Tribe Travail (in Liars and Knights)
Posted on 2014-01-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Incircles in equilateral triangles (in Geometry)
Posted on 2014-01-18 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Real Resolution (in Just Math) Rating: 3.50
Posted on 2014-01-16 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Summing up the dividers' dividers (in Numbers)
Posted on 2014-01-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Repeated Digits (in Sequences)
Posted on 2014-01-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Numerators sum also (in Numbers)
Posted on 2014-01-13 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hustler Duo Determination (in Logic)
Posted on 2014-01-13 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pentagon in a semicircle (in Geometry)
Posted on 2014-01-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Find that decade (in Just Math)
Posted on 2014-01-06 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Palindromic and p-gonal (in Just Math)
Posted on 2014-01-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5120° Breeds 90° (in Geometry) Rating: 3.00
Posted on 2014-01-04 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Simple trigo (in Geometry)
Posted on 2014-01-03 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Primed and Perfect (in Just Math)
Posted on 2014-01-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Supreme Subset (in Just Math)
Posted on 2014-01-02 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 2 of 5all squares (in Geometry)
Posted on 2014-01-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Inference Extraction (in Logic) Rating: 2.00
Posted on 2013-12-31 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Pairagrams (in Word Problems)
Posted on 2013-12-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Boys' names (in Word Problems) Rating: 5.00
Posted on 2013-12-30 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Trigonometric product (in Numbers) Rating: 4.00
Posted on 2013-12-29 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Hotel Room Rumination (in Logic) Rating: 3.50
Posted on 2013-12-26 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Algebra and Primes (in Numbers) Rating: 4.00
Posted on 2013-12-25 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Tic Tac Toe II (in Probability)
Posted on 2013-12-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Hidden Animals (in General) Rating: 2.00
Posted on 2013-12-24 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Rationally Integers II (in Just Math)
Posted on 2013-12-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Fight (in Logic) Rating: 3.00
Posted on 2013-12-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Hats revisited (in Probability)
Posted on 2013-12-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Some Powers Sum Square II (in Just Math)
Posted on 2013-12-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5All 1's (in Numbers)
Posted on 2013-12-14 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Six Letter Strikeout (in Tricks) Rating: 3.00
Posted on 2013-12-10 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Square Crossed Sequence (in Sequences)
Posted on 2013-12-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Two Rectangles (in Geometry) Rating: 3.00
Posted on 2013-12-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 51998 (in Numbers)
Posted on 2013-12-05 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Consecutive Base Baffle (in Just Math)
Posted on 2013-12-04 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5APPLE + LEMON = BANANA (in Numbers)
Posted on 2013-12-04 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 58 Dice II (in Numbers)
Posted on 2013-12-03 by Charlie (No Solution Yet, 0 Comments)
Difficulty: 3 of 520 Word Lattice II (in Word Problems)
Posted on 2013-12-02 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Lively Letters (in Logic) Rating: 3.00
Posted on 2013-12-02 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Square in a Pentagon (in Geometry) Rating: 3.00
Posted on 2013-12-01 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Continued Multiples (in Numbers) Rating: 3.50
Posted on 2013-11-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Great sequence (in Sequences) Rating: 5.00
Posted on 2013-11-28 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Pentagon in a Square (in Geometry)
Posted on 2013-11-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Harmonic Harness (in Probability)
Posted on 2013-11-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Hexagonal Palindrome (in Just Math)
Posted on 2013-11-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Equal sums on a circle (in General) Rating: 3.00
Posted on 2013-11-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 520 Word Lattice I (in Word Problems) Rating: 5.00
Posted on 2013-11-25 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Day-knights and night-knights 7 (in Logic)
Posted on 2013-11-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A 6-digit answer (in Numbers)
Posted on 2013-11-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Safe chess piece (in Games) Rating: 3.33
Posted on 2013-11-21 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Face-Up Card Array (in Logic)
Posted on 2013-11-20 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Testing Three Students (in Just Math) Rating: 4.00
Posted on 2013-11-20 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5LCM equation (in Numbers) Rating: 4.33
Posted on 2013-11-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 58 dice, 3 questions (in Numbers)
Posted on 2013-11-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A Square, a Rectangle and a Triangle (in Geometry) Rating: 3.00
Posted on 2013-11-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Embedded Triangles (in Shapes)
Posted on 2013-11-16 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Digital Dilemma (in Just Math)
Posted on 2013-11-15 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Define winning strategy (in Games)
Posted on 2013-11-14 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Barcoded (in Cryptography)
Posted on 2013-11-14 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Four Egyptian Fractions (in Numbers)
Posted on 2013-11-13 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Consecutive Additions (in Numbers) Rating: 3.00
Posted on 2013-11-12 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Covert Quantity IV (in Numbers)
Posted on 2013-11-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hexagon in a square (in Shapes)
Posted on 2013-11-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Two possible sums (in Numbers)
Posted on 2013-11-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Four Digits (in Numbers) Rating: 4.00
Posted on 2013-11-05 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Quadratic Quandary (in Just Math)
Posted on 2013-11-04 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Five Natives (in Liars and Knights)
Posted on 2013-11-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Triangles And Rectangles Pair (in Geometry)
Posted on 2013-11-01 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5River Row (in Logic)
Posted on 2013-10-31 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Fill In The Blanks (in Numbers)
Posted on 2013-10-30 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Polycubic surface (in Shapes)
Posted on 2013-10-29 by Jer (No Solution Yet, 1 Comments)
Difficulty: 1 of 5End Breadth (in Science)
Posted on 2013-10-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Slow Cows (in General) Rating: 4.00
Posted on 2013-10-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Perfect Prime Provision? (in Just Math) Rating: 4.50
Posted on 2013-10-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mansion Murder Muse (in Logic) Rating: 2.00
Posted on 2013-10-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Drinking Dwarfs (in Just Math)
Posted on 2013-10-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Sum of Cubes (in Numbers)
Posted on 2013-10-23 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 58_Primes III (in Numbers)
Posted on 2013-10-21 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Five by Five (in Numbers)
Posted on 2013-10-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Just prove it (in Just Math)
Posted on 2013-10-20 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Take the right one (in Weights and Scales) Rating: 3.00
Posted on 2013-10-18 by Ady TZIDON (No Solution Yet, 18 Comments)
Difficulty: 2 of 5DoDeCaGon (in Shapes)
Posted on 2013-10-18 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Minimum Sum Muse (in Just Math) Rating: 2.00
Posted on 2013-10-16 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 58_Primes II (in Numbers)
Posted on 2013-10-15 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reciprocal Equation #5 (in Just Math)
Posted on 2013-10-15 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5LCM by pairs (in Just Math)
Posted on 2013-10-14 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sums of sixth powers I (in Just Math)
Posted on 2013-10-13 by broll (No Solution Yet, 0 Comments)
Difficulty: 1 of 5Trigo computation (in Numbers)
Posted on 2013-10-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hobsons choice(?) (in Numbers) Rating: 4.00
Posted on 2013-10-10 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 58_Primes I (in Numbers)
Posted on 2013-10-09 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Quintic Expression (in Just Math) Rating: 4.00
Posted on 2013-10-09 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Race Resolution (in Just Math) Rating: 2.00
Posted on 2013-10-08 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Restore from scratches (in Numbers) Rating: 4.00
Posted on 2013-10-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two cars, three towns (in Just Math) Rating: 2.00
Posted on 2013-10-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Powering (in Just Math)
Posted on 2013-10-05 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5First Floobles Factorization (in General) Rating: 4.00
Posted on 2013-10-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Non existing altitudes (in Geometry)
Posted on 2013-10-03 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5GCD to product (in Just Math)
Posted on 2013-10-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Host Colligation (in Logic) Rating: 2.00
Posted on 2013-10-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Repunit Rigor II (in Just Math) Rating: 5.00
Posted on 2013-10-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Listing cubes (in Numbers) Rating: 4.50
Posted on 2013-10-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Warm/Cool Number Guessing (in Numbers)
Posted on 2013-09-30 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Imperfectly Cubed (in Just Math)
Posted on 2013-09-29 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Rhomboctagon (in Geometry) Rating: 3.00
Posted on 2013-09-28 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5mistakes (in Numbers)
Posted on 2013-09-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Eleven is a factor (in Numbers)
Posted on 2013-09-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Smallinomial (in Just Math)
Posted on 2013-09-25 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sequence Limit (in Calculus)
Posted on 2013-09-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 52-D number guessing. (in Numbers)
Posted on 2013-09-23 by Jer (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Three Semi-Circles (in Geometry)
Posted on 2013-09-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sequence Term and Sum (in Sequences)
Posted on 2013-09-20 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Four Cards (in Logic) Rating: 1.00
Posted on 2013-09-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Maximizing product (in Geometry)
Posted on 2013-09-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Age Ascertainment IV (in Logic)
Posted on 2013-09-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Big areas (in Numbers)
Posted on 2013-09-17 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Nominal Expression Sum (in Just Math)
Posted on 2013-09-17 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Staggered divisibility (in Numbers)
Posted on 2013-09-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Score Degree Deduction (in Just Math)
Posted on 2013-09-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5From hints to a missing digit (in Numbers)
Posted on 2013-09-13 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Connnected Construction (in Just Math)
Posted on 2013-09-13 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Divisibility wanted (in Numbers)
Posted on 2013-09-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prime candidates (in Numbers)
Posted on 2013-09-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Mysterious Sequence (in Sequences) Rating: 3.50
Posted on 2013-09-11 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5play with digit (in Numbers)
Posted on 2013-09-10 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Great (in Just Math)
Posted on 2013-09-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two top targets (in Numbers)
Posted on 2013-09-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Letter Magic Square (in Logic)
Posted on 2013-09-05 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5The 1234 Problem (in Numbers)
Posted on 2013-09-05 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sudoprime (in Numbers) Rating: 4.00
Posted on 2013-09-04 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The Last Two Digits (in Just Math) Rating: 4.00
Posted on 2013-09-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Next year (in Numbers) Rating: 4.00
Posted on 2013-09-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5All zeroes solution (in Numbers)
Posted on 2013-09-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Near Magic Cube (in Logic)
Posted on 2013-08-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Broken Cash Register (in Just Math)
Posted on 2013-08-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Crossnumber III (in General)
Posted on 2013-08-29 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Eight Calculations (in Logic)
Posted on 2013-08-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5NegaFibo series (in Numbers)
Posted on 2013-08-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Wild and Wooley Numbers (in Numbers)
Posted on 2013-08-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Two Cubes (in Logic)
Posted on 2013-08-28 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The 1979 Series (in Sequences)
Posted on 2013-08-27 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Mission impossible II (in Numbers)
Posted on 2013-08-26 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5The cunning Condition (in Just Math)
Posted on 2013-08-25 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Decimal Digit Determination (in Just Math)
Posted on 2013-08-24 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Related Series (in Sequences)
Posted on 2013-08-23 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Dodecagonal Diagonals (in Shapes)
Posted on 2013-08-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Z for Zero, X for siX (in Just Math)
Posted on 2013-08-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Temperature Temperament III (in Weights and Scales)
Posted on 2013-08-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Tread Ware (in General) Rating: 2.50
Posted on 2013-08-20 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Root sum or integer? (in Just Math)
Posted on 2013-08-18 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Integrable Nest (in Calculus)
Posted on 2013-08-16 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Random Queens (in Probability) Rating: 3.00
Posted on 2013-08-16 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pidigital primes (in Numbers)
Posted on 2013-08-15 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5NegaBinary Numbers (in Algorithms) Rating: 3.00
Posted on 2013-08-14 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Habeas corpus (in Word Problems)
Posted on 2013-08-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Crime Commitment Conclusion (in Liars and Knights) Rating: 3.50
Posted on 2013-08-12 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Rhombus Rationale (in Geometry)
Posted on 2013-08-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Morley's Ghost (in Geometry) Rating: 3.50
Posted on 2013-08-10 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5An Elusive Quadratic (in Numbers)
Posted on 2013-08-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Seven - with and without (in Numbers) Rating: 3.67
Posted on 2013-08-09 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5The Far Sides (in Numbers)
Posted on 2013-08-08 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Geometric Sequence Settlement (in Sequences)
Posted on 2013-08-07 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5No Triple Repetitions (in Sequences)
Posted on 2013-08-06 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The bottom line (in Logic)
Posted on 2013-08-05 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Round Results (in Numbers)
Posted on 2013-08-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Testy Triplet Treat (in Just Math)
Posted on 2013-08-04 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Non Sloane Surmise (in Sequences)
Posted on 2013-08-02 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A Funny Function (in Calculus) Rating: 4.00
Posted on 2013-08-01 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Broken Calculator II (in Just Math)
Posted on 2013-07-31 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Maximizing sum (in Numbers)
Posted on 2013-07-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Trigonometry Nest III (in Just Math)
Posted on 2013-07-28 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Squarely Sorted (in Numbers)
Posted on 2013-07-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5AMY and ANN (in General) Rating: 4.00
Posted on 2013-07-26 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A Pleasurable Puzzle (in Just Math)
Posted on 2013-07-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Casting Out Zeros (in Just Math)
Posted on 2013-07-25 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Weighted Quadrilateral (in Geometry) Rating: 3.00
Posted on 2013-07-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Dominoes and checkerboard (in General)
Posted on 2013-07-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Prince Rupert's Tetrahedron (in Shapes)
Posted on 2013-07-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 57 boolean Questions (in Logic)
Posted on 2013-07-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Penny Parity (in General) Rating: 3.00
Posted on 2013-07-18 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 54b4N & after (in Numbers) Rating: 3.00
Posted on 2013-07-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Table Tennis Serve (in Just Math)
Posted on 2013-07-17 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Framing (in Geometry) Rating: 4.00
Posted on 2013-07-16 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5S.o.d. classification (in Just Math)
Posted on 2013-07-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Upside Down LCD Display (in Numbers)
Posted on 2013-07-15 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Unique Value (in Just Math) Rating: 2.00
Posted on 2013-07-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Every Die Face (in Probability) Rating: 3.00
Posted on 2013-07-12 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5How many trains? (in Just Math) Rating: 4.00
Posted on 2013-07-12 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Factorials AND Powers (in Numbers)
Posted on 2013-07-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Safe and sound (in Logic) Rating: 2.50
Posted on 2013-07-09 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Simple Thinking (in Numbers)
Posted on 2013-07-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5The Seventh Power (in Numbers)
Posted on 2013-07-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pascal Triangle (in Numbers)
Posted on 2013-07-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Queen Placements (in Games)
Posted on 2013-07-05 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5One is a sum (in Numbers)
Posted on 2013-07-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mystery Matrix (in Sequences)
Posted on 2013-07-04 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Singleton Settlement II (in Logic)
Posted on 2013-07-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Just asking (in Just Math)
Posted on 2013-07-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 1 of 5222 (in Word Problems) Rating: 2.00
Posted on 2013-07-02 by Danish Ahmed Khan (No Solution Yet, 11 Comments)
Difficulty: 3 of 5The Exclusive Club (in Paradoxes) Rating: 5.00
Posted on 2013-07-01 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Digital Factorial (in Numbers)
Posted on 2013-07-01 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Rationalism (in Numbers)
Posted on 2013-06-30 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Changing form (in Just Math)
Posted on 2013-06-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5My uncle's habits (in Probability) Rating: 4.67
Posted on 2013-06-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5What's the ... (in Just Math)
Posted on 2013-06-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Hound Path (in General) Rating: 3.00
Posted on 2013-06-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Easy Findings (in Numbers)
Posted on 2013-06-26 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Winning Number (in Tricks)
Posted on 2013-06-26 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Bullseye (in Logic)
Posted on 2013-06-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Clockwork (in Logic)
Posted on 2013-06-24 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Infinite Product (in Numbers)
Posted on 2013-06-24 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Misleading data (in Just Math)
Posted on 2013-06-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5PRIMY inequality (in Just Math)
Posted on 2013-06-22 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Words, words, numbers (in Word Problems)
Posted on 2013-06-21 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Shiny Numbers (in Just Math)
Posted on 2013-06-20 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Card Deal (in Logic)
Posted on 2013-06-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Bridge Too Far (in Logic)
Posted on 2013-06-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sliding Coin puzzle (in General) Rating: 3.50
Posted on 2013-06-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Black and White Issue (in Just Math) Rating: 1.00
Posted on 2013-06-18 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Any others? (in Numbers)
Posted on 2013-06-18 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5All bases comply (in Numbers) Rating: 2.00
Posted on 2013-06-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Divisibility of N (in Numbers)
Posted on 2013-06-15 by Jer (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Introductions all around (in General) Rating: 3.00
Posted on 2013-06-14 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Jumbo Digits (in Just Math)
Posted on 2013-06-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Mister Digit Face (in Just Math)
Posted on 2013-06-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Vera's Date (in Logic) Rating: 4.00
Posted on 2013-06-12 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Mouse eating Cheese (in Logic)
Posted on 2013-06-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mail Delivery Muse (in Logic) Rating: 2.50
Posted on 2013-06-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A G E S III (in Just Math) Rating: 2.50
Posted on 2013-06-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Lion and Tamer (in Logic) Rating: 4.00
Posted on 2013-06-10 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Adjacent Square Sum II (in Just Math)
Posted on 2013-06-10 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Cubic Equation (in Just Math)
Posted on 2013-06-09 by K Sengupta (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Chess game reconstruction (in Games)
Posted on 2013-06-08 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Place Perception (in Logic) Rating: 4.00
Posted on 2013-06-07 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Divisibility and Digit Sum (in Just Math)
Posted on 2013-06-07 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Sail & beware (in Word Problems)
Posted on 2013-06-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5I loved (in General) Rating: 4.00
Posted on 2013-06-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5'X' cluded (in Logic)
Posted on 2013-06-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5B & G (in Logic) Rating: 1.00
Posted on 2013-06-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Circle on a grid 2 (in Shapes)
Posted on 2013-06-02 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Mean Distance Two Points (in Shapes)
Posted on 2013-06-01 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Pascal's e (in Calculus)
Posted on 2013-05-29 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Strings of Nines (in Numbers)
Posted on 2013-05-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Play or Pass (in Probability) Rating: 3.00
Posted on 2013-05-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Race Winner (in Liars and Knights) Rating: 2.00
Posted on 2013-05-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5UVWXYZ (in Just Math)
Posted on 2013-05-27 by Danish Ahmed Khan (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Crossnumber II (in General) Rating: 4.00
Posted on 2013-05-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Productive Numbers (in Just Math)
Posted on 2013-05-26 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Crossed Cylinders (in Shapes) Rating: 4.00
Posted on 2013-05-25 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Circle on a grid 1 (in Shapes)
Posted on 2013-05-24 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Mice Supplements (in General) Rating: 5.00
Posted on 2013-05-22 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A bee in my hand (in Riddles)
Posted on 2013-05-22 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5High Scorer (in General)
Posted on 2013-05-21 by K Sengupta (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Simple expression but difficult answer (in Just Math)
Posted on 2013-05-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Adjacent Square Sum (in Just Math)
Posted on 2013-05-20 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Wet Rain (in Just Math)
Posted on 2013-05-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5It is simpler than you think (in Just Math)
Posted on 2013-05-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mating Moves (in Games)
Posted on 2013-05-17 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Squares and Cubes II (in Numbers) Rating: 3.00
Posted on 2013-05-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Paint Perception (in Logic)
Posted on 2013-05-15 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Divisibility of 29 (in Numbers) Rating: 4.00
Posted on 2013-05-15 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Diophantine Equation (in Just Math)
Posted on 2013-05-14 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fifteen (in Games) Rating: 1.00
Posted on 2013-05-13 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Positive Integer, Odd Digits, Divisibility (in Just Math) Rating: 3.67
Posted on 2013-05-12 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Lovely Fibonacci (in Just Math)
Posted on 2013-05-11 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Tower Travail (in Just Math)
Posted on 2013-05-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Attack! (2) (in Games) Rating: 4.50
Posted on 2013-05-09 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Proverb Converse (in Word Problems)
Posted on 2013-05-09 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Odd steps (in Numbers)
Posted on 2013-05-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Roman Resolve (in Sequences)
Posted on 2013-05-08 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5No comments (in Numbers) Rating: 3.50
Posted on 2013-05-07 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Planet Life (in Logic) Rating: 1.67
Posted on 2013-05-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Numerical Logic (in Logic)
Posted on 2013-05-06 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hatu ,Utah?? (in Word Problems)
Posted on 2013-05-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Time for some Prime (in Just Math)
Posted on 2013-05-05 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Marriage Muse (in Logic) Rating: 2.00
Posted on 2013-05-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fibo and GCD (in Numbers)
Posted on 2013-05-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Colorful Win (in Games)
Posted on 2013-05-02 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Generalize (in Numbers)
Posted on 2013-05-01 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Christmas Carol Conclusion (in Word Problems)
Posted on 2013-05-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Consecutive Cuts (in Word Problems)
Posted on 2013-04-30 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Festival and Games (in Logic)
Posted on 2013-04-29 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Three in, one out (in Just Math) Rating: 3.50
Posted on 2013-04-29 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Dark Divisibility (in Just Math) Rating: 3.75
Posted on 2013-04-27 by Danish Ahmed Khan (No Solution Yet, 21 Comments)
Difficulty: 3 of 5The Seven Primes (in Just Math)
Posted on 2013-04-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Professor Perception (in Logic) Rating: 3.50
Posted on 2013-04-25 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Equaliteral Triangle Division (in Shapes)
Posted on 2013-04-25 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Battleships (in Logic)
Posted on 2013-04-24 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 52012 sum Digit (in Just Math)
Posted on 2013-04-23 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Power Remainder III (in Just Math) Rating: 2.50
Posted on 2013-04-22 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5How much and why ? (in Logic)
Posted on 2013-04-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Incredibly difficult sequence (in Sequences)
Posted on 2013-04-21 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Elegantly Greedy Pirates (in Just Math) Rating: 3.00
Posted on 2013-04-20 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Overheard in a London eatery's kitchen (in General) Rating: 3.67
Posted on 2013-04-19 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Minus Cube (in Games)
Posted on 2013-04-18 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Maximizing the ratio (in Just Math) Rating: 2.00
Posted on 2013-04-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A scaled-down experiment (in Science) Rating: 4.00
Posted on 2013-04-17 by broll (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Singleton Settlement (in Logic)
Posted on 2013-04-16 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Close neighbours (in Just Math)
Posted on 2013-04-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Veracity Verification (in Liars and Knights) Rating: 2.67
Posted on 2013-04-15 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Computer's Delight (in Cryptography) Rating: 4.00
Posted on 2013-04-14 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Equilateral Crease (in Shapes) Rating: 3.00
Posted on 2013-04-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Powered Pair (in Just Math)
Posted on 2013-04-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bonjour, Pascal ! (in Just Math) Rating: 4.00
Posted on 2013-04-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Population of Funkytown (in Logic) Rating: 4.00
Posted on 2013-04-10 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Pass the beer (in Probability) Rating: 3.00
Posted on 2013-04-09 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Stupid number trick V (in Numbers) Rating: 1.50
Posted on 2013-04-09 by Jer (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Square division II (in Shapes) Rating: 1.00
Posted on 2013-04-08 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Powers often in other bases. (in Numbers)
Posted on 2013-04-07 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Area of hexagon... (in Geometry)
Posted on 2013-04-06 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Neat Network II (in General)
Posted on 2013-04-05 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Temperature Temperament II (in Science) Rating: 2.00
Posted on 2013-04-04 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5The sum = the product (in Just Math)
Posted on 2013-04-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reasonable Suspicion (in Riddles) Rating: 2.00
Posted on 2013-04-01 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Finding Average (in Logic) Rating: 1.50
Posted on 2013-04-01 by Danish Ahmed Khan (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Dangerous Expression for Rationals (in Numbers)
Posted on 2013-03-31 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 2 of 5irreducible? (in Just Math)
Posted on 2013-03-29 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5 Analyzing LOTTO (in Numbers)
Posted on 2013-03-28 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Tennis Tease (in Logic) Rating: 3.50
Posted on 2013-03-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Irrational ^ Irrational = Rational (in Numbers)
Posted on 2013-03-27 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Parabolic discovery (in Just Math)
Posted on 2013-03-25 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fiancé Resolution (in Liars and Knights) Rating: 5.00
Posted on 2013-03-25 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Murderous Performer (in Logic)
Posted on 2013-03-22 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Repeated part divisible by 9 (in Numbers)
Posted on 2013-03-22 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Algebraic Device (in Algorithms)
Posted on 2013-03-21 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Inequality challenged (in Just Math)
Posted on 2013-03-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Age Ascertainment III (in Logic)
Posted on 2013-03-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Consecutively Divisible (in Just Math)
Posted on 2013-03-18 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Ecin reversal! (in Numbers)
Posted on 2013-03-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Four Coin Theorem (in Shapes)
Posted on 2013-03-17 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rational Rigor II (in Just Math)
Posted on 2013-03-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Goldbach revisited (in Numbers)
Posted on 2013-03-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Solubility Settlement (in Science)
Posted on 2013-03-15 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5UN cargo (in Numbers) Rating: 4.50
Posted on 2013-03-13 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Two ladders (in Geometry)
Posted on 2013-03-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Strange Equation (in Just Math)
Posted on 2013-03-11 by Danish Ahmed Khan (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Recondite Route (in Logic)
Posted on 2013-03-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cyclic QUAD (in Shapes)
Posted on 2013-03-10 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Product in a Circle (in Shapes)
Posted on 2013-03-09 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Three neighbours (in Numbers)
Posted on 2013-03-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5BINGO! (in Probability) Rating: 4.00
Posted on 2013-03-07 by Kenny M (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Homophones Misrepresented (in Word Problems)
Posted on 2013-03-06 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Temperature Temperament (in Just Math) Rating: 2.00
Posted on 2013-03-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 54 sixes (in Numbers)
Posted on 2013-03-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Ceiling and Floor Formulation (in Algorithms)
Posted on 2013-03-04 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Digit permutation (in Numbers)
Posted on 2013-03-03 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Fun sequence (in Sequences)
Posted on 2013-03-01 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Trespassing (in Cryptography) Rating: 5.00
Posted on 2013-03-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Geometric Generalization (in Probability)
Posted on 2013-02-28 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Summing Ones (in Numbers)
Posted on 2013-02-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Underground occupation (in Cryptography) Rating: 5.00
Posted on 2013-02-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 5 of 5Prime source (in Numbers)
Posted on 2013-02-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Seating Singularity (in Logic)
Posted on 2013-02-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5On congruent numbers (in Numbers) Rating: 5.00
Posted on 2013-02-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Magical Magician (in Numbers) Rating: 3.50
Posted on 2013-02-23 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Anagrams Misrepresented (in Word Problems)
Posted on 2013-02-22 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Crossanagram (in Word Problems)
Posted on 2013-02-21 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Perfect squares (in Numbers) Rating: 4.00
Posted on 2013-02-21 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Commemorative triangles (in Sequences)
Posted on 2013-02-20 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Not represented (in Numbers) Rating: 4.00
Posted on 2013-02-20 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Reflected Halves (in Word Problems)
Posted on 2013-02-19 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Purely prime (in Just Math) Rating: 5.00
Posted on 2013-02-19 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quiz Results II (in Logic)
Posted on 2013-02-18 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Money Muddle (in Liars and Knights)
Posted on 2013-02-18 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Reasonable Root ? (in Just Math)
Posted on 2013-02-17 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Composite Contemplation (in Just Math)
Posted on 2013-02-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Primed to Square (in Just Math) Rating: 4.00
Posted on 2013-02-15 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5From proverbs to alphametics (in General)
Posted on 2013-02-15 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Extra Egyptians (in Just Math)
Posted on 2013-02-14 by broll (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Triangle Perimeters (in Shapes)
Posted on 2013-02-13 by Jer (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Divisibility rule (in Just Math) Rating: 3.00
Posted on 2013-02-13 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Finding numbers (in Numbers)
Posted on 2013-02-12 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fifteen Frolic (in Games)
Posted on 2013-02-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Commemorations 2 (in Sequences)
Posted on 2013-02-11 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Consecutive Contemplation II (in Sequences)
Posted on 2013-02-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Egyptian Number (in Just Math) Rating: 2.33
Posted on 2013-02-09 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Rocking digits (in Numbers)
Posted on 2013-02-08 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Musket Mettle (in Logic) Rating: 3.00
Posted on 2013-02-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5No Soiree (in Numbers) Rating: 3.00
Posted on 2013-02-07 by brianjn (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Commemorations (in Weights and Scales) Rating: 3.00
Posted on 2013-02-06 by Jer (No Solution Yet, 7 Comments)
Difficulty: 1 of 5Apartment Allotment (in Logic) Rating: 4.00
Posted on 2013-02-06 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A false claim (in Numbers)
Posted on 2013-02-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Celsius = 1/Fahrenheit (in Just Math)
Posted on 2013-02-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Respectively Divisible (in Just Math) Rating: 4.00
Posted on 2013-02-04 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Midpoint problem (in Geometry) Rating: 3.00
Posted on 2013-02-03 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Products in A.P. (in Sequences)
Posted on 2013-02-01 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Age Ascertainment II (in Logic) Rating: 1.00
Posted on 2013-02-01 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Arrangements count (in Just Math)
Posted on 2013-01-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Planetary Perception (in Word Problems)
Posted on 2013-01-30 by K Sengupta (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Group Endeavor (in General) Rating: 1.50
Posted on 2013-01-29 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5The 73rd digit (in Numbers)
Posted on 2013-01-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Below 5K (in Just Math)
Posted on 2013-01-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Who is older? (in Tricks) Rating: 3.00
Posted on 2013-01-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum of real Roots (in Just Math)
Posted on 2013-01-27 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Cute Divisibility (in Numbers)
Posted on 2013-01-26 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pandigital? (in Numbers)
Posted on 2013-01-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Add 1, Get Harmonic (in Sequences) Rating: 4.00
Posted on 2013-01-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Greetings from P (in Sequences)
Posted on 2013-01-24 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 59 distinct digits in 3 products (in Numbers) Rating: 4.00
Posted on 2013-01-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5An age conversation (in Just Math)
Posted on 2013-01-22 by Jer (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Prime only as it is (in Numbers)
Posted on 2013-01-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Sourcing the Start (in Word Problems)
Posted on 2013-01-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5USA = n*UK (in Numbers)
Posted on 2013-01-21 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Twins I (in Just Math)
Posted on 2013-01-20 by broll (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Some basic Maths (in Just Math)
Posted on 2013-01-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5A cancellation fallacy (in Just Math)
Posted on 2013-01-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Off by one (in Numbers) Rating: 4.00
Posted on 2013-01-18 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Lake Trips (in Logic) Rating: 2.50
Posted on 2013-01-17 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Penny Drop (in Science) Rating: 3.00
Posted on 2013-01-17 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Last three digits (in Just Math) Rating: 2.00
Posted on 2013-01-16 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Type Identification (in Probability) Rating: 2.00
Posted on 2013-01-15 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rhombus problem, with tangents and parallel (in Geometry) Rating: 3.00
Posted on 2013-01-13 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Thirteenth power (in Just Math)
Posted on 2013-01-12 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 2 of 5A chain of odds (in Numbers)
Posted on 2013-01-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Party People II (in Logic) Rating: 3.00
Posted on 2013-01-11 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two urns (in Probability) Rating: 4.00
Posted on 2013-01-10 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Arm Appraisal IV (in Liars and Knights)
Posted on 2013-01-10 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Weights and balls (in Weights and Scales) Rating: 4.00
Posted on 2013-01-09 by Philip7086 (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Fifth powers (in Just Math)
Posted on 2013-01-06 by Danish Ahmed Khan (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Divisible by 2009 (in Just Math)
Posted on 2013-01-05 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5An Alpha Spell (in Numbers)
Posted on 2013-01-03 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Accurate Association (in Logic) Rating: 1.50
Posted on 2013-01-03 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Dual Prime Magic (in Numbers) Rating: 4.00
Posted on 2013-01-02 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Divisibility of factorials II (in Numbers)
Posted on 2013-01-01 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5xoF = (nx)oC (in Just Math) Rating: 3.00
Posted on 2012-12-31 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Odd Men Out (in General)
Posted on 2012-12-30 by broll (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Divisibility of factorials (in Numbers)
Posted on 2012-12-29 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Modular mathematics (in Just Math) Rating: 4.00
Posted on 2012-12-28 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Area of semicircle (in Shapes)
Posted on 2012-12-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Perpendicular (in Geometry) Rating: 3.33
Posted on 2012-12-26 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 1 of 511 does not divide any of them (in Numbers)
Posted on 2012-12-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Sadism (in Numbers)
Posted on 2012-12-24 by brianjn (No Solution Yet, 9 Comments)
Difficulty: 1 of 5n+1,n+11,n+111 (in Just Math) Rating: 2.25
Posted on 2012-12-24 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rooting for Three Roots (in Just Math) Rating: 4.00
Posted on 2012-12-23 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Phantom Spheres (in Geometry)
Posted on 2012-12-22 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Not a Prime (in Just Math) Rating: 3.00
Posted on 2012-12-20 by Danish Ahmed Khan (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Transfer of initial digit (in Numbers)
Posted on 2012-12-20 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5All(?) about SEQ (in Numbers) Rating: 5.00
Posted on 2012-12-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A little Generalization (in Numbers)
Posted on 2012-12-18 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Five Fives Fancy Formula (in Just Math)
Posted on 2012-12-17 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Inequality in sums of digits (in Just Math)
Posted on 2012-12-17 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Ones and Nines (in Just Math)
Posted on 2012-12-13 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5From Poland with love (in Just Math)
Posted on 2012-12-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Subtractive years (in Numbers)
Posted on 2012-12-12 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Border Magic (in Numbers)
Posted on 2012-12-11 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Go count (in Numbers) Rating: 5.00
Posted on 2012-12-11 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5No integer solutions (in Just Math) Rating: 3.00
Posted on 2012-12-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5My new sequence (in Sequences)
Posted on 2012-12-08 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Possibilities of a (in Just Math) Rating: 3.00
Posted on 2012-12-07 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A List of Statements (in Logic)
Posted on 2012-12-07 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 2 of 5GCD of Fibonacci (in Numbers)
Posted on 2012-12-06 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Products of digits. (in Just Math)
Posted on 2012-12-05 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Find the triplets (in Just Math) Rating: 1.00
Posted on 2012-12-04 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Arm Appraisal II (in Liars and Knights) Rating: 3.00
Posted on 2012-12-03 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Why prime remainder? (in Just Math)
Posted on 2012-12-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Divisible by 3. (in Just Math) Rating: 3.00
Posted on 2012-12-02 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Disk Magic (in Numbers)
Posted on 2012-11-30 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Twelve Period Tease (in Just Math)
Posted on 2012-11-30 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 5 of 5Summing the fiftieth power (in Shapes)
Posted on 2012-11-29 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 1 of 5A square is a cube (in Numbers) Rating: 3.00
Posted on 2012-11-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5MAX octagonal area (in Shapes)
Posted on 2012-11-28 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Prime pentagon (in Just Math)
Posted on 2012-11-27 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 2 of 53 cubes? - not always (in Just Math)
Posted on 2012-11-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Getting closer (in Just Math) Rating: 4.50
Posted on 2012-11-25 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 53402 02 N1 509 873 (in General) Rating: 5.00
Posted on 2012-11-23 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 5 of 5Equal digit sum (in Just Math)
Posted on 2012-11-22 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Creeping Ants (in Probability)
Posted on 2012-11-21 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 55 partitions (in Just Math) Rating: 3.00
Posted on 2012-11-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Round Trip (in Logic)
Posted on 2012-11-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Yes we can (in Numbers) Rating: 2.50
Posted on 2012-11-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Skewed Area (in Shapes)
Posted on 2012-11-19 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Corner Commencement (in Word Problems)
Posted on 2012-11-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Not a clear cut (in Logic)
Posted on 2012-11-18 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Square in Square (in Geometry) Rating: 4.00
Posted on 2012-11-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Peculiar pentagon (in Geometry) Rating: 3.00
Posted on 2012-11-15 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 52-way traffic (in Word Problems) Rating: 4.00
Posted on 2012-11-14 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Lawless Lawyer (in Logic) Rating: 3.00
Posted on 2012-11-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5N 9 Terminations (in Numbers)
Posted on 2012-11-11 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 3 of 5An interesting sequence (in Numbers) Rating: 4.00
Posted on 2012-11-10 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Bard as a source (in General)
Posted on 2012-11-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Consecutive Contemplation (in Numbers)
Posted on 2012-11-08 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Club Encounter (in General) Rating: 3.00
Posted on 2012-11-05 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Missing digit (in General) Rating: 3.33
Posted on 2012-11-03 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Baking the best pie (in Numbers) Rating: 4.00
Posted on 2012-11-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5House Hindrance (in Liars and Knights) Rating: 4.25
Posted on 2012-11-01 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Vampire numbers (in Just Math) Rating: 4.67
Posted on 2012-10-31 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quips et al (in Word Problems) Rating: 3.00
Posted on 2012-10-30 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Monstrous prime? (in Just Math) Rating: 2.67
Posted on 2012-10-29 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Special Numbers II (in Just Math)
Posted on 2012-10-28 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5my house's number II (in Numbers)
Posted on 2012-10-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Exploring HCNs (in Numbers)
Posted on 2012-10-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Transformed square (in Shapes)
Posted on 2012-10-25 by Jer (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Derivative (Integral) = Integral (Derivative)? (in Calculus) Rating: 2.50
Posted on 2012-10-24 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Away from home (in Just Math) Rating: 5.00
Posted on 2012-10-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Gender and Occupation (in Logic) Rating: 5.00
Posted on 2012-10-22 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5The Death Slug (in Games)
Posted on 2012-10-18 by Dustin (No Solution Yet, 3 Comments)
Difficulty: 2 of 5White vs red (in Probability)
Posted on 2012-10-17 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Extremum Expressions (in Just Math) Rating: 3.50
Posted on 2012-10-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Big B's theorem (in Geometry) Rating: 2.00
Posted on 2012-10-14 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Transformed circle (in Shapes) Rating: 4.00
Posted on 2012-10-13 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 5P/Q (in Just Math) Rating: 4.00
Posted on 2012-10-12 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Wiki Ladders (in Word Problems) Rating: 4.00
Posted on 2012-10-11 by broll (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Center to center (in Geometry) Rating: 4.00
Posted on 2012-10-10 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Coin Game II (in Probability)
Posted on 2012-10-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5A tricky ricky quicky (in Sequences)
Posted on 2012-10-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Origamic III (in Shapes)
Posted on 2012-10-07 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prove it, please (in Just Math) Rating: 5.00
Posted on 2012-10-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Analogous Days (in General)
Posted on 2012-10-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Three Fractions II (in Numbers) Rating: 3.00
Posted on 2012-10-01 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 562 - 63 (in General) Rating: 3.00
Posted on 2012-09-30 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5My Age (in Just Math) Rating: 5.00
Posted on 2012-09-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Stopping for lunch II (in Just Math)
Posted on 2012-09-28 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A flawed proof? (2) (in Tricks)
Posted on 2012-09-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Two times n equals 2n-1 (in Word Problems)
Posted on 2012-09-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Palindrome ponder (in Just Math) Rating: 3.00
Posted on 2012-09-23 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A productive s.o.d. (in Just Math)
Posted on 2012-09-19 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5US or NOT (in Cryptography) Rating: 4.67
Posted on 2012-09-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Awesome Level (in Numbers)
Posted on 2012-09-15 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Boxing Baffle (in Logic) Rating: 2.00
Posted on 2012-09-12 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5A silly opinion (in General)
Posted on 2012-09-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5440 (in Tricks) Rating: 3.00
Posted on 2012-09-10 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Positively Real (in Just Math) Rating: 5.00
Posted on 2012-09-09 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5by L. Euler (in General) Rating: 4.33
Posted on 2012-09-08 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Poker Game (in Probability) Rating: 4.00
Posted on 2012-09-07 by Chris, PhD (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Cookie Monster (in Tricks) Rating: 4.50
Posted on 2012-09-06 by Joshua (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Wordates (in General) Rating: 5.00
Posted on 2012-09-03 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Tetra Net (in Shapes) Rating: 4.50
Posted on 2012-09-02 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Pandoprime (in Numbers)
Posted on 2012-09-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 55th powers (in Numbers) Rating: 3.50
Posted on 2012-08-30 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Turn Tease (in Liars and Knights) Rating: 1.67
Posted on 2012-08-27 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Less than ten thou (in Numbers) Rating: 5.00
Posted on 2012-08-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 51707 (in Numbers) Rating: 3.00
Posted on 2012-08-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Consecutive digits (in Numbers)
Posted on 2012-08-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The number p (in Numbers) Rating: 4.00
Posted on 2012-08-19 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Name it correctly (in Logic) Rating: 5.00
Posted on 2012-08-16 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Odd One Out III (in Word Problems)
Posted on 2012-08-15 by K Sengupta (No Solution Yet, 14 Comments)
Difficulty: 2 of 5A powerful s.o.d. (in Numbers)
Posted on 2012-08-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5From Russia with love (in Weights and Scales)
Posted on 2012-08-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Some cubes! (in Numbers)
Posted on 2012-08-10 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Additive years (in Numbers) Rating: 5.00
Posted on 2012-08-08 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Wilson the 3rd (in Numbers)
Posted on 2012-08-07 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5The lowest sums (in Just Math)
Posted on 2012-08-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Mind-Swapping Machine (in Logic) Rating: 5.00
Posted on 2012-08-02 by Dustin (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Equality for all (in Just Math) Rating: 3.67
Posted on 2012-07-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Gossip (in Just Math) Rating: 4.50
Posted on 2012-07-26 by Ady TZIDON (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Folding Square II (in Shapes) Rating: 4.00
Posted on 2012-07-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Day-knights and night-knights 5 (in Logic) Rating: 4.50
Posted on 2012-07-24 by Dustin (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Succinct Sundays (in General)
Posted on 2012-07-23 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Pigeons again (in Sequences) Rating: 5.00
Posted on 2012-07-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Machine Machinations (in Weights and Scales)
Posted on 2012-07-21 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 59 of the same shape (in Geometry) Rating: 4.00
Posted on 2012-07-19 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 51232 is HERE (in Numbers) Rating: 3.00
Posted on 2012-07-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Revoltosos (in Liars and Knights)
Posted on 2012-07-16 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 52012 Equal Expressions (in Numbers) Rating: 1.00
Posted on 2012-07-15 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 2 of 599 for odd powers (in Numbers) Rating: 3.67
Posted on 2012-07-14 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Timely determination II (in Just Math)
Posted on 2012-07-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5GIPSY ROAD: (in General) Rating: 5.00
Posted on 2012-07-12 by Ady TZIDON (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Wasteland (in General)
Posted on 2012-07-11 by brianjn (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Hillside Shepherds (in Liars and Knights) Rating: 5.00
Posted on 2012-07-10 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Three Words II (in Word Problems)
Posted on 2012-07-08 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The Magnificent Eleven (in Numbers) Rating: 4.00
Posted on 2012-07-07 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Mein Field (in Games) Rating: 3.50
Posted on 2012-07-05 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Nevo and Oven (in Numbers) Rating: 4.00
Posted on 2012-07-04 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Getting closer to three targets (in Numbers) Rating: 5.00
Posted on 2012-07-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Circle in a Prism (in Shapes)
Posted on 2012-06-30 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mixed Doubles II - Keyboard Konfusion (in Word Problems)
Posted on 2012-06-27 by Dustin (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Nod to fife and food (in Numbers) Rating: 4.50
Posted on 2012-06-26 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5One is k times the other (in Numbers)
Posted on 2012-06-25 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 56 weights (in Weights and Scales)
Posted on 2012-06-24 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Electronic Lock (in Numbers)
Posted on 2012-06-23 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Complementary, my dear Watson (in Numbers) Rating: 5.00
Posted on 2012-06-22 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Hexagonal triples (in Word Problems)
Posted on 2012-06-20 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5ET Intelligence? (in Sequences)
Posted on 2012-06-13 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Irrational to Rational (in Just Math)
Posted on 2012-06-09 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Use all nine (in Numbers) Rating: 5.00
Posted on 2012-06-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Most Trickiest Pearls (in Weights and Scales)
Posted on 2012-06-07 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Excited to win (in Probability)
Posted on 2012-06-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mixed Doubles (in Word Problems)
Posted on 2012-06-04 by Dustin (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Stella Octangula (in Numbers)
Posted on 2012-06-03 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5 The smallest sum (in Numbers) Rating: 4.67
Posted on 2012-06-02 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A Square Problem II (in Shapes)
Posted on 2012-05-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Produce More (in Numbers) Rating: 5.00
Posted on 2012-05-29 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Twice nine (in Numbers)
Posted on 2012-05-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Spherical shelter 3 (in Calculus) Rating: 4.00
Posted on 2012-05-27 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sorta pythagoric...(2) (in Just Math)
Posted on 2012-05-26 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Repeated roll (in Probability)
Posted on 2012-05-25 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Prefix Precision (in Word Problems)
Posted on 2012-05-23 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Serenity? (in Sequences)
Posted on 2012-05-22 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Triangular Crease 789 (in Shapes) Rating: 5.00
Posted on 2012-05-20 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A Prime Triplet (in Numbers) Rating: 4.67
Posted on 2012-05-19 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Tower Melds (in Word Problems)
Posted on 2012-05-17 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Nine Androids Crossing a Bridge (in Logic)
Posted on 2012-05-14 by Dej Mar (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A beast in a pie (in Numbers)
Posted on 2012-05-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Last 2007 digits (in Just Math) Rating: 5.00
Posted on 2012-05-12 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Words of warning (in Cryptography) Rating: 4.00
Posted on 2012-05-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Greatest Integer Sum (in Just Math) Rating: 3.00
Posted on 2012-05-07 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Spherical shelter 2 (in Calculus)
Posted on 2012-05-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mirror, mirror (in Numbers) Rating: 5.00
Posted on 2012-05-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Lean-to shelter (in Shapes)
Posted on 2012-05-03 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Lengthy Containment (in Word Problems)
Posted on 2012-05-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Many Multiples (in Sequences) Rating: 4.00
Posted on 2012-04-30 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Normal or not? (in Numbers)
Posted on 2012-04-29 by broll (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Spherical shelter (in Shapes)
Posted on 2012-04-27 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Smart Trams (in Word Problems)
Posted on 2012-04-26 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Type Deduction II (in Liars and Knights) Rating: 5.00
Posted on 2012-04-23 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A Trisected Angle and the Opposing Side (in Geometry) Rating: 4.00
Posted on 2012-04-22 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5SUMUS (in Just Math)
Posted on 2012-04-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Hexagonal Rings (in Word Problems)
Posted on 2012-04-20 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Closest to e (in Numbers)
Posted on 2012-04-18 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Twenty what?! (in Word Problems)
Posted on 2012-04-17 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Lengthy Word 2 (in Word Problems)
Posted on 2012-04-16 by Gamer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Three Power Remainder (in Just Math) Rating: 4.00
Posted on 2012-04-14 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Uncrossable Measured Wall (in Numbers)
Posted on 2012-04-10 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Prime Tours (in Numbers)
Posted on 2012-04-08 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Return to Treasure Island (in General)
Posted on 2012-04-05 by broll (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Point to 2012 (in Just Math) Rating: 3.00
Posted on 2012-04-04 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Prime Selection (in Numbers)
Posted on 2012-04-03 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Checkers Run (in Games)
Posted on 2012-04-01 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Identifiable Identities (in Cryptography)
Posted on 2012-03-31 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Proof needed (in Just Math) Rating: 4.00
Posted on 2012-03-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Lengthy Word (in Word Problems)
Posted on 2012-03-29 by K Sengupta (No Solution Yet, 21 Comments)
Difficulty: 4 of 5Simultaneous Operations - Tiles Jeopardy (in Numbers)
Posted on 2012-03-25 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Word Builder 2 (in Word Problems)
Posted on 2012-03-23 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Math. competition, (in Just Math) Rating: 3.75
Posted on 2012-03-21 by Ady TZIDON (No Solution Yet, 103 Comments)
Difficulty: 1 of 5Slick Equality (in Tricks) Rating: 3.00
Posted on 2012-03-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Summing inverses II (in Just Math)
Posted on 2012-03-16 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Fifth Term Settlement (in Sequences)
Posted on 2012-03-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Simultaneous Operations - Tiles (in Numbers)
Posted on 2012-03-13 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Regular Tetrahedron 1234 (in Shapes)
Posted on 2012-03-08 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A Cup Of Coffee II (in Weights and Scales)
Posted on 2012-03-06 by K Sengupta (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Longest by Halves (in Word Problems)
Posted on 2012-03-05 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Simultaneous Operations - Pairs (in Numbers)
Posted on 2012-03-03 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Another Magic Die (in Probability)
Posted on 2012-02-28 by Dustin (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Constructing a Sphere (in Algorithms) Rating: 4.00
Posted on 2012-02-25 by Dustin (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Rainbow Towers (in Games)
Posted on 2012-02-23 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Liar Students (in Probability)
Posted on 2012-02-20 by Praneeth (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Which is Which II (in Weights and Scales)
Posted on 2012-02-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Competitive number guessing (in Probability)
Posted on 2012-02-11 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Ascension II (in Word Problems)
Posted on 2012-02-10 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 5 of 5Inherited Veracity (in Liars and Knights) Rating: 5.00
Posted on 2012-02-09 by Dustin (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sliced Grid, Same Sum (in Shapes)
Posted on 2012-02-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Non - Zero Digit II (in Just Math)
Posted on 2012-02-05 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Squarely Primed (in Numbers) Rating: 4.00
Posted on 2012-02-04 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Net Coverage (in Numbers)
Posted on 2012-02-02 by Dustin (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Running Race (in Liars and Knights) Rating: 4.00
Posted on 2012-01-31 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Sum of squares (in Just Math)
Posted on 2012-01-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 55-by-5 Square Tic-Tac-Toe (in Games) Rating: 4.00
Posted on 2012-01-26 by Dustin (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Odd One Out II (in General) Rating: 4.00
Posted on 2012-01-25 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Elite Etile (in Word Problems)
Posted on 2012-01-23 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Four Point Spheres (in Probability)
Posted on 2012-01-22 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Yes and no (in Just Math)
Posted on 2012-01-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5'W'here to Start (in Cryptography) Rating: 4.00
Posted on 2012-01-19 by Dustin (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find Merkle (in Probability)
Posted on 2012-01-18 by brianjn (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Sum Binary Digits (in Probability) Rating: 3.00
Posted on 2012-01-16 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Maybe? (in Just Math) Rating: 3.00
Posted on 2012-01-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 518 digits (in Just Math) Rating: 3.00
Posted on 2012-01-12 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Abarcadraba (in Word Problems)
Posted on 2012-01-10 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Produce a product (in Just Math) Rating: 3.67
Posted on 2012-01-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Find out (in Numbers)
Posted on 2012-01-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Integer Forms (in Just Math) Rating: 4.00
Posted on 2012-01-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Numeric Meld (in Numbers)
Posted on 2012-01-06 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Another folded paper (in Shapes)
Posted on 2012-01-03 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Hidden Birds (in Word Problems)
Posted on 2012-01-02 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 52011 Square Sum Start (in Just Math)
Posted on 2011-12-31 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Consecutive non-divisors (in Just Math)
Posted on 2011-12-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 58s and 9s (in Numbers) Rating: 5.00
Posted on 2011-12-21 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Word Meld 8 (in Word Problems)
Posted on 2011-12-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5PentaWord 2 (in Word Problems)
Posted on 2011-12-18 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5N-Divisibility II (in Just Math) Rating: 5.00
Posted on 2011-12-17 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 55-digit period (in Just Math) Rating: 4.00
Posted on 2011-12-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Getting gadgets galore (in Just Math) Rating: 5.00
Posted on 2011-12-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Polygons in a Cube (in Just Math)
Posted on 2011-12-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Ones or twos (in Just Math)
Posted on 2011-12-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Four Point Polygons (in Probability)
Posted on 2011-12-06 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two Power Divides Product (in Just Math) Rating: 4.00
Posted on 2011-12-05 by K Sengupta (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Not all are equal (in Just Math) Rating: 5.00
Posted on 2011-12-03 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Over fourteen (in Sequences) Rating: 3.67
Posted on 2011-12-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Don't try this barefoot. (in Probability) Rating: 5.00
Posted on 2011-12-01 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Timely determination (in Just Math)
Posted on 2011-11-29 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Prime Order (in Just Math)
Posted on 2011-11-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Shuffle Cross II (in Word Problems)
Posted on 2011-11-26 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Pandigital Multiple (in Probability)
Posted on 2011-11-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Angle of view - Ellipse and Hyperbola (in Just Math) Rating: 4.50
Posted on 2011-11-24 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5To and fro (in Calculus)
Posted on 2011-11-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5All in the family (in Just Math) Rating: 4.50
Posted on 2011-11-20 by Ady TZIDON (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Factorial Quotient (in Just Math) Rating: 4.50
Posted on 2011-11-19 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Slide and Add (in Word Problems)
Posted on 2011-11-18 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Twins, triplets and more (in Just Math) Rating: 4.00
Posted on 2011-11-17 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Angle of view - Parabola (in Geometry) Rating: 3.00
Posted on 2011-11-13 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Some relation! (in Just Math) Rating: 3.00
Posted on 2011-11-11 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Momentous Multiple (in Numbers)
Posted on 2011-11-10 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Shuffle Cross I (in Word Problems) Rating: 2.00
Posted on 2011-11-09 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 1 of 5A quicky: (in Numbers) Rating: 5.00
Posted on 2011-11-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Power Difference (in Just Math)
Posted on 2011-11-06 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Power Division II (in Just Math) Rating: 5.00
Posted on 2011-11-05 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Looking for n (2) (in Numbers)
Posted on 2011-11-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An extended harmony (in Just Math)
Posted on 2011-11-01 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Special dice (in Just Math) Rating: 4.00
Posted on 2011-10-30 by Ady TZIDON (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Some digits sum square II (in Probability)
Posted on 2011-10-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Angle of view (in Just Math)
Posted on 2011-10-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Repunit Rigor (in Just Math) Rating: 3.00
Posted on 2011-10-25 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Lasts a year (in Just Math) Rating: 3.67
Posted on 2011-10-24 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Slow growing sequence (in Sequences)
Posted on 2011-10-20 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Last three digits (in Just Math) Rating: 3.00
Posted on 2011-10-19 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Nickki Primes (in Numbers)
Posted on 2011-10-18 by broll (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Going Maximum With Perfect Cubes (in Just Math)
Posted on 2011-10-15 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Avoid ambiguity (in General) Rating: 4.00
Posted on 2011-10-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangular Polygons II (in Probability)
Posted on 2011-10-11 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Prime and power poser (in Just Math) Rating: 3.00
Posted on 2011-10-09 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 5 of 5Build one – get two free (in Numbers) Rating: 4.50
Posted on 2011-10-08 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Concerning combinatorics (in Numbers) Rating: 4.50
Posted on 2011-10-04 by Jer (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Telephone Number Travail (in Just Math) Rating: 5.00
Posted on 2011-09-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Some pedigree! (in Logic) Rating: 5.00
Posted on 2011-09-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Square Concatenation (in Numbers)
Posted on 2011-09-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum Month and Day II (in General)
Posted on 2011-09-20 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Product Sum Settlement (in Numbers)
Posted on 2011-09-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The Scenic Route (in General)
Posted on 2011-09-15 by Gamer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mental Arithmetic II (in Just Math)
Posted on 2011-09-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 512 ways (in Numbers)
Posted on 2011-09-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Electric Rabbits (in Sequences) Rating: 4.00
Posted on 2011-09-07 by Joshua (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Five out of one (in Geometry)
Posted on 2011-09-06 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Catering to sportsmen's whims (in Numbers) Rating: 5.00
Posted on 2011-09-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Squaring Up The Digits II (in Just Math) Rating: 4.33
Posted on 2011-09-03 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Melting the ice (in General) Rating: 5.00
Posted on 2011-09-01 by Ady TZIDON (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Abjad Analysis (in Word Problems)
Posted on 2011-08-31 by broll (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Tribonacci Travail (in Sequences)
Posted on 2011-08-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5It is not hard (in Word Problems) Rating: 5.00
Posted on 2011-08-29 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Sum of cubes and squares (in Just Math)
Posted on 2011-08-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum, Times, I Wonder..(3) (in Numbers)
Posted on 2011-08-27 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Romanumerals (in Just Math)
Posted on 2011-08-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quartic Quandary (in Just Math) Rating: 3.00
Posted on 2011-08-23 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Move the 2 - double the number II (in Just Math)
Posted on 2011-08-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Math pyramid (in Just Math)
Posted on 2011-08-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Mine & thine (in Just Math) Rating: 5.00
Posted on 2011-08-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Expression Evaluation (in Just Math)
Posted on 2011-08-17 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Quantum Coding (in Cryptography)
Posted on 2011-08-16 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Divisible? Yes and No. (in Just Math)
Posted on 2011-08-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5a!+ b!+ c!= abc – a (in Just Math)
Posted on 2011-08-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5My favorite numbers VIII (in Just Math) Rating: 1.00
Posted on 2011-08-10 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 4 of 5'Magic' Cube (in Numbers)
Posted on 2011-08-09 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Rating our neighbours (in Geometry) Rating: 3.00
Posted on 2011-08-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sequence Addition (in Sequences) Rating: 4.00
Posted on 2011-08-03 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Geometric Integers II (in Just Math) Rating: 5.00
Posted on 2011-08-02 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5How many roots? (in Just Math)
Posted on 2011-07-31 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Counting triplets II (in Just Math)
Posted on 2011-07-30 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Squaring Up The Digits (in Numbers)
Posted on 2011-07-28 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Compare (in Just Math)
Posted on 2011-07-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Inflation or deflation? (in General) Rating: 5.00
Posted on 2011-07-25 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5SequiSearch (in Sequences) Rating: 3.00
Posted on 2011-07-24 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Lucky seven IV (in Just Math)
Posted on 2011-07-23 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5At the party (in Logic) Rating: 4.00
Posted on 2011-07-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Floors and decimals integral II (in Calculus)
Posted on 2011-07-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5S-olve T-his (in Word Problems) Rating: 3.67
Posted on 2011-07-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5All Shift by 1 (in Cryptography) Rating: 3.50
Posted on 2011-07-15 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Prime Birthdays II (in Just Math)
Posted on 2011-07-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Close neighbors (in Just Math) Rating: 5.00
Posted on 2011-07-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Antimagic square (in Probability) Rating: 5.00
Posted on 2011-07-12 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Send less money (in Numbers)
Posted on 2011-07-11 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Toggle a Combo (in Numbers) Rating: 3.00
Posted on 2011-07-10 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Brevity is the soul of wit (in Word Problems)
Posted on 2011-07-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Three spheres (in Geometry)
Posted on 2011-07-08 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Over the Baker's Fence (in Cryptography) Rating: 5.00
Posted on 2011-07-07 by broll (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Mixed Muddle (in Just Math)
Posted on 2011-07-05 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Sum, Product and Square (in Just Math)
Posted on 2011-07-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Gold inside (in Shapes) Rating: 3.00
Posted on 2011-06-29 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5As easy as abc (in Just Math) Rating: 5.00
Posted on 2011-06-28 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5A skilfull erasure (in Just Math)
Posted on 2011-06-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 52011 = Sum of Squares (in Numbers)
Posted on 2011-06-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Rooting for two digits (in Probability)
Posted on 2011-06-24 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Some digits sum square (in Probability) Rating: 3.00
Posted on 2011-06-22 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fermat simplified (in Just Math)
Posted on 2011-06-21 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Calamari Stringer (in Cryptography) Rating: 4.67
Posted on 2011-06-20 by Gamer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Missing Hexadecimal Digits (in Just Math)
Posted on 2011-06-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Maze in Crisis 2 (in General) Rating: 5.00
Posted on 2011-06-17 by Gamer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Samba Primes (in Numbers) Rating: 3.60
Posted on 2011-06-14 by broll (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Triangular Cubes III (in Probability)
Posted on 2011-06-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum number equals integer (in Numbers)
Posted on 2011-06-11 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Decode the double code (in Just Math) Rating: 4.00
Posted on 2011-06-09 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Missing digits (in Just Math) Rating: 3.67
Posted on 2011-06-06 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Duplicate Digit Determination IV (in Just Math)
Posted on 2011-06-05 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Near Pandigital Divisibility (in Probability)
Posted on 2011-06-03 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Garden (in General)
Posted on 2011-05-30 by Gamer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Greatest Root Difference (in Probability)
Posted on 2011-05-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5One harder sequence (in Sequences)
Posted on 2011-05-24 by broll (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Sum and Ratio Sum II (in Just Math)
Posted on 2011-05-21 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 2 of 5One Easier Sequence (in Sequences)
Posted on 2011-05-17 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum Remainder Deduction (in Just Math)
Posted on 2011-05-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Terminating in three 8s (in Just Math)
Posted on 2011-05-11 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Counting Sextuplets (in Just Math)
Posted on 2011-05-04 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Inversely Irrational (in Just Math)
Posted on 2011-05-01 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Mod And Near Myriad (in Just Math)
Posted on 2011-04-24 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Powering up the digits IV (in Numbers)
Posted on 2011-04-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Quartic and Consecutive Concern (in Just Math)
Posted on 2011-04-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Odd and Integer Zeros (in Just Math)
Posted on 2011-04-13 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Square Alphametics (in Numbers)
Posted on 2011-04-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5My favorite numbers VII (in Just Math)
Posted on 2011-04-06 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Shrinkable numbers (in Numbers) Rating: 5.00
Posted on 2011-04-05 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Sum, Times, I Wonder..(2) (in Numbers)
Posted on 2011-04-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Powerful Digit (in Probability) Rating: 4.00
Posted on 2011-03-29 by Jer (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Factorial Difference = Perfect Square (in Just Math) Rating: 2.50
Posted on 2011-03-28 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 52011 Powered Digits (in Just Math)
Posted on 2011-03-25 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Distinct Digit Determination III (in Just Math)
Posted on 2011-03-24 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Rational Rigor (in Just Math) Rating: 3.50
Posted on 2011-03-22 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Numerous Numeral Enumeration (in Just Math) Rating: 4.50
Posted on 2011-03-20 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 3 of 5By Jove, we're leaving (I think)! (in Liars and Knights) Rating: 4.00
Posted on 2011-03-17 by rod hines (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Domino Polygons (in Probability)
Posted on 2011-03-14 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Double Definite Dilemma (in Calculus) Rating: 3.00
Posted on 2011-03-12 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Painter's Dilemma (in Algorithms) Rating: 4.00
Posted on 2011-03-08 by Kenny M (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prime = Sqrt of Summed Primes (in Numbers) Rating: 2.00
Posted on 2011-03-06 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Divisibility to square (in Just Math) Rating: 4.00
Posted on 2011-03-05 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 5 of 5How far can you go? (in Numbers) Rating: 4.00
Posted on 2011-03-04 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Who`s on the right base? (in Numbers)
Posted on 2011-03-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Pythagoras Irrational (in Numbers)
Posted on 2011-03-01 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Three W answers (in Numbers) Rating: 4.00
Posted on 2011-02-27 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 520(11) a tenth power? Baseless! (in Just Math) Rating: 3.50
Posted on 2011-02-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Penta_Full View (in Shapes)
Posted on 2011-02-24 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Get the last digit II (in Numbers) Rating: 4.00
Posted on 2011-02-23 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Sum Functions Determination (in Just Math)
Posted on 2011-02-19 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5a) is easy, b) is not (in Just Math) Rating: 3.00
Posted on 2011-02-18 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Factorial zeros (in Numbers) Rating: 5.00
Posted on 2011-02-17 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Penta_View (in Shapes)
Posted on 2011-02-17 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Upgrade to 13 (in Weights and Scales) Rating: 3.00
Posted on 2011-02-16 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Some sum sod settlement (in Just Math)
Posted on 2011-02-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Pythagoras Unconventional (in Numbers) Rating: 4.00
Posted on 2011-02-10 by brianjn (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Q^2 + R = 1977 (in Just Math)
Posted on 2011-02-08 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A small difference (in Just Math)
Posted on 2011-02-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Powered Greatest Root (in Sequences)
Posted on 2011-02-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5241 (in Just Math)
Posted on 2011-02-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Forty- niners (in Numbers) Rating: 4.00
Posted on 2011-02-01 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5All Wired Up Again (in Logic)
Posted on 2011-02-01 by Brian Smith (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Start as you wish (in Numbers)
Posted on 2011-01-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Flipping Even-Odd (in Probability)
Posted on 2011-01-28 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5(sod(x))^2 = x+2 (in Probability)
Posted on 2011-01-26 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rook vs Bishop (in Games)
Posted on 2011-01-25 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Don't lose too fast (in Probability) Rating: 4.00
Posted on 2011-01-25 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Just P&P (in Numbers) Rating: 4.00
Posted on 2011-01-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Numerator Divisibility Nuance (in Just Math)
Posted on 2011-01-22 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A binary enigma (in Games)
Posted on 2011-01-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Two ellipses (in Geometry)
Posted on 2011-01-19 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Sum and Ratio Sum (in Just Math)
Posted on 2011-01-16 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Three Term Trial (in Just Math) Rating: 2.50
Posted on 2011-01-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Greatest Root Power (in Just Math)
Posted on 2011-01-12 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Scarce primes (in Numbers) Rating: 3.67
Posted on 2011-01-10 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Near Goldbach Alphametics II (in Numbers)
Posted on 2011-01-07 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Powers of primes (in Numbers)
Posted on 2011-01-06 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 55 Digit Number II (in Numbers) Rating: 5.00
Posted on 2011-01-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Happy New Year (in Numbers)
Posted on 2011-01-01 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Commuting Involutions Maximally (in Just Math)
Posted on 2010-12-31 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Digital Combo-Lock (in Sequences)
Posted on 2010-12-30 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Structured Sequential Square Root Sum (in Just Math)
Posted on 2010-12-29 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Single or double (in Numbers) Rating: 4.00
Posted on 2010-12-24 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Duplicate Digit Determination III (in Just Math)
Posted on 2010-12-23 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Ambiguous dice (in Just Math)
Posted on 2010-12-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Around the ring (in Shapes) Rating: 3.00
Posted on 2010-12-20 by Jer (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Some strings attached (in Just Math)
Posted on 2010-12-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Reverse Square to Prime (in Numbers)
Posted on 2010-12-14 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sum Prime Power (in Just Math)
Posted on 2010-12-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Hail to thee, Sofia! (in Just Math) Rating: 3.00
Posted on 2010-12-13 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 4 of 5A piece of pie (in Just Math)
Posted on 2010-12-07 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Hi, Tori! (in Logic)
Posted on 2010-12-05 by Gamer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Mother of nine (in Just Math) Rating: 4.00
Posted on 2010-12-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Mélodie de porc (in Cryptography) Rating: 2.00
Posted on 2010-11-30 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Music to your ears (in Word Problems)
Posted on 2010-11-28 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Verticos (in Numbers)
Posted on 2010-11-27 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Polynomial Ponder (in Just Math)
Posted on 2010-11-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sum > Sum Reciprocals (in Just Math)
Posted on 2010-11-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Triangulating a hexagon. (in Just Math) Rating: 4.00
Posted on 2010-11-24 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Fun Function (in Calculus)
Posted on 2010-11-23 by Larry (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Count them (in Numbers)
Posted on 2010-11-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5My favorite numbers VI (in Just Math)
Posted on 2010-11-21 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Dudeney revisited (in Cryptography) Rating: 5.00
Posted on 2010-11-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Duplicate Digit Determination II (in Just Math)
Posted on 2010-11-19 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Wrapped Loop (in Shapes)
Posted on 2010-11-18 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Rolling to score (in Probability) Rating: 3.33
Posted on 2010-11-15 by Ady TZIDON (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Seven Divisibility Settlement (in Just Math) Rating: 2.00
Posted on 2010-11-13 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Magic, but limited (in Just Math)
Posted on 2010-11-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Three 3 digit numbers using 1-9 (in Numbers) Rating: 2.50
Posted on 2010-11-11 by Vishal Gupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Divides them all.... (in Numbers)
Posted on 2010-11-11 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Slide to Wrap Loop (in Shapes)
Posted on 2010-11-09 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5A game of coins (in Probability)
Posted on 2010-11-09 by Vishal Gupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Who is afraid of 7 (or 23) ? (in Numbers)
Posted on 2010-11-08 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Tiled Loop (in Shapes) Rating: 4.00
Posted on 2010-11-05 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 4 of 5OOO3= one out of three (in Just Math)
Posted on 2010-11-04 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Lost Logarithm (in Just Math) Rating: 3.00
Posted on 2010-11-02 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rubik Words (in Word Problems)
Posted on 2010-11-02 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Distinct Digit Determination (in Probability)
Posted on 2010-10-31 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 555th in the list (in Numbers)
Posted on 2010-10-28 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Lost package (in Probability) Rating: 3.00
Posted on 2010-10-28 by Vishal Gupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Pretty Potent Primes IV (in Numbers) Rating: 3.00
Posted on 2010-10-26 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Few, but active (in Just Math) Rating: 1.00
Posted on 2010-10-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Equilateral Right Angle Locus (in Geometry) Rating: 3.00
Posted on 2010-10-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Defined Function (in Just Math) Rating: 4.00
Posted on 2010-10-24 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 55 conditions to get 2 results (in Just Math) Rating: 2.50
Posted on 2010-10-21 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Lying gambler (in Probability)
Posted on 2010-10-21 by Vishal Gupta (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Big, super and prime (in Numbers) Rating: 3.00
Posted on 2010-10-20 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Look for the pairs (in Just Math) Rating: 4.00
Posted on 2010-10-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Distance = Inradius (in Geometry) Rating: 2.00
Posted on 2010-10-14 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Homophone Paired Ladders (in Word Problems)
Posted on 2010-10-12 by brianjn (No Solution Yet, 7 Comments)
Difficulty: 3 of 53 Primes = Prime (in Numbers)
Posted on 2010-10-10 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Prime time (in Numbers)
Posted on 2010-10-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5ABCDishes (in General)
Posted on 2010-10-07 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 53 Primes yield 12 (in Numbers) Rating: 4.00
Posted on 2010-10-07 by brianjn (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Prime-Time Ant (in Numbers)
Posted on 2010-10-05 by broll (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Optimal Card Drawing Strategy 2 (in Games)
Posted on 2010-10-02 by Daniel (No Solution Yet, 5 Comments)
Difficulty: 3 of 5No way to run a railroad. (in Numbers)
Posted on 2010-10-01 by broll (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Three forever (in Tricks) Rating: 2.75
Posted on 2010-09-30 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Homophonic Chains (in Word Problems)
Posted on 2010-09-28 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Roman matches (in Logic)
Posted on 2010-09-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5sod(square) - number = 2 (in Just Math) Rating: 3.50
Posted on 2010-09-27 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5 Nineteen triplets (in Just Math) Rating: 3.00
Posted on 2010-09-23 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 4 of 5If....Then... (in Logic)
Posted on 2010-09-21 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Primed Groups (in Numbers)
Posted on 2010-09-19 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Which multiple of 9? (in Just Math) Rating: 4.00
Posted on 2010-09-17 by Jer (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Foundation Piece (in Cryptography) Rating: 3.00
Posted on 2010-09-16 by brianjn (No Solution Yet, 7 Comments)
Difficulty: 3 of 5129 again (in Numbers) Rating: 3.33
Posted on 2010-09-15 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Thrice three is nine (in Numbers) Rating: 4.50
Posted on 2010-09-11 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Three circles (in Calculus) Rating: 5.00
Posted on 2010-09-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Circles and Polygons (in Just Math)
Posted on 2010-09-05 by Larry (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Nostra culpa (in Numbers) Rating: 3.00
Posted on 2010-09-03 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Lamps in a row (in Geometry)
Posted on 2010-09-03 by Bractals (No Solution Yet, 11 Comments)
Difficulty: 1 of 5Decode my message. (in Cryptography) Rating: 3.00
Posted on 2010-08-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5World Traveller (in General) Rating: 3.00
Posted on 2010-08-29 by Andre (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Wacko Calculator II (in Just Math)
Posted on 2010-08-27 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Number of 1s (in Probability)
Posted on 2010-08-26 by Praneeth (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Composite? Yes. (in Numbers)
Posted on 2010-08-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quite a Smithonian! (in Numbers) Rating: 3.00
Posted on 2010-08-21 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Squares Probability III (in Just Math)
Posted on 2010-08-19 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Solid triangles (3) (in Shapes)
Posted on 2010-08-18 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5MultiTile (in Shapes)
Posted on 2010-08-17 by brianjn (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Treasure Island (in Probability)
Posted on 2010-08-15 by broll (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Square sum with 5-6-7 (in Just Math)
Posted on 2010-08-13 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Prime, but not forever (in Sequences) Rating: 3.00
Posted on 2010-08-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Set of Lines with a Condition (in Just Math)
Posted on 2010-08-11 by Praneeth (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Powerful and consecutive (in Numbers) Rating: 3.00
Posted on 2010-08-09 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Perpendicular Concurrency Concern (in Geometry)
Posted on 2010-08-08 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 2 of 518-yes, 17-maybe (in Just Math)
Posted on 2010-08-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Same Mean and Median (in Numbers)
Posted on 2010-08-05 by Praneeth (No Solution Yet, 6 Comments)
Difficulty: 3 of 5At Least Three Difference (in Numbers) Rating: 5.00
Posted on 2010-08-04 by Brian Smith (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Delicate Derivative Derivation II (in Calculus) Rating: 3.00
Posted on 2010-08-03 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 55 cubes representation (in Numbers) Rating: 4.00
Posted on 2010-07-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5(x!+1)/(x+1) = prime number (in Probability) Rating: 2.33
Posted on 2010-07-30 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Blindfolded at the Great Wall of China (in Geometry) Rating: 4.50
Posted on 2010-07-29 by David Shin (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Cut Cuboid = Elliptic Cone (in Shapes)
Posted on 2010-07-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5String Theory...not quite (in Numbers)
Posted on 2010-07-27 by Andre (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Three Skill Settlement (in Just Math)
Posted on 2010-07-26 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 4 of 5POWER CHAIN. (in Sequences)
Posted on 2010-07-22 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Fibo composes (in Sequences) Rating: 3.67
Posted on 2010-07-21 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Three Lock Box (in Geometry)
Posted on 2010-07-19 by Larry (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Oddly divisible (in Just Math) Rating: 3.33
Posted on 2010-07-17 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Restoring the erased (in Just Math) Rating: 4.00
Posted on 2010-07-14 by Ady TZIDON (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Points On A Circle II (in Geometry) Rating: 4.00
Posted on 2010-07-13 by K Sengupta (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Elite Letters (in Word Problems)
Posted on 2010-07-12 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Make A Fib (in Just Math)
Posted on 2010-07-09 by Larry (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Another Square (in Numbers)
Posted on 2010-07-06 by brianjn (No Solution Yet, 9 Comments)
Difficulty: 2 of 5A rare event (in Numbers)
Posted on 2010-07-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Triangle from Two Lines (in Geometry)
Posted on 2010-07-01 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Magma et al. (in Word Problems) Rating: 4.50
Posted on 2010-06-30 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Mr. Markov plays cards (in Probability)
Posted on 2010-06-26 by Andre (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Keys to the World (in Sequences) Rating: 3.00
Posted on 2010-06-22 by Andre (No Solution Yet, 4 Comments)
Difficulty: 4 of 5129 digits (in Numbers)
Posted on 2010-06-18 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5My favorite numbers V (in Just Math)
Posted on 2010-06-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Russian Roulette (in Probability) Rating: 4.50
Posted on 2010-06-08 by John zadeh (No Solution Yet, 13 Comments)
Difficulty: 5 of 5Cover the Center (in Geometry)
Posted on 2010-06-04 by Larry (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Smokey's Smokes (in Probability) Rating: 5.00
Posted on 2010-06-03 by John zadeh (No Solution Yet, 7 Comments)
Difficulty: 2 of 550 - Digit Number II (in Just Math) Rating: 3.00
Posted on 2010-05-29 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Cover the Circumference (in Geometry)
Posted on 2010-05-25 by Larry (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Cross the Circle (in Geometry)
Posted on 2010-05-23 by Larry (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Minimal distance from a point inside a triangle to vertices. (in Geometry)
Posted on 2010-05-22 by Vee-Liem Veefessional (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Odd primes never die (in Numbers) Rating: 3.67
Posted on 2010-05-20 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Primed to Magic (in Numbers)
Posted on 2010-05-18 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Many triplets (in Just Math)
Posted on 2010-05-10 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5My favorite numbers IV (in Just Math) Rating: 1.00
Posted on 2010-05-08 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Wins 2 - wins all (in Probability)
Posted on 2010-05-06 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Up and up (in Numbers) Rating: 4.00
Posted on 2010-05-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Think Spiral (in Cryptography) Rating: 2.50
Posted on 2010-04-30 by brianjn (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Choose your neighbor (in Numbers)
Posted on 2010-04-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Positive Integer Choice (in Just Math) Rating: 1.00
Posted on 2010-04-22 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Halfway Split2 (in Cryptography)
Posted on 2010-04-08 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Matching Matchbox Muse (in Probability)
Posted on 2010-03-30 by K Sengupta (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Palindromic and Tautonymic III (in Numbers) Rating: 3.00
Posted on 2010-03-23 by K Sengupta (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Another hour-glass (in Shapes)
Posted on 2010-03-15 by Larry (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Limiting Mean part 3 (in Calculus)
Posted on 2010-03-14 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5In Harmony with averages (in Numbers) Rating: 3.00
Posted on 2010-03-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Limiting Mean part 2 (in Calculus) Rating: 1.00
Posted on 2010-03-10 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Pigeons will like it (in Numbers)
Posted on 2010-03-08 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prime Music Blues (in Numbers)
Posted on 2010-03-06 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Pythagoras knew it!! (in Numbers)
Posted on 2010-03-05 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5My favorite numbers III (in Just Math)
Posted on 2010-03-04 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Candy Concerns (in Just Math)
Posted on 2010-02-23 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Month, product and prime alphametics (in Numbers)
Posted on 2010-02-20 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangle 'magic' (in Numbers)
Posted on 2010-02-19 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Black and Blue Transaction (in Probability)
Posted on 2010-02-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Succinct Age Settlement (in Just Math) Rating: 1.00
Posted on 2010-02-09 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Enough is enough (in Games)
Posted on 2010-01-29 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Dots in a Cube (in Geometry)
Posted on 2010-01-27 by TheKPAXian (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Possible Percent Problems Part 4 (in Numbers) Rating: 4.00
Posted on 2010-01-20 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Possible Percent Problems Part 3 (in Numbers)
Posted on 2010-01-15 by Jer (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Sum Month and Day (in General) Rating: 1.00
Posted on 2010-01-14 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Possible Percent Problems Part 2 (in Numbers)
Posted on 2010-01-11 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Possible Percent Problems Part 1 (in Numbers)
Posted on 2010-01-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Absolute Adjacent Cell Difference (in Just Math)
Posted on 2010-01-02 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Supreme Successive Shuffle (in Probability)
Posted on 2009-12-15 by K Sengupta (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Cubic Surface (in Shapes)
Posted on 2009-12-07 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 55-Digit Squares (in Numbers)
Posted on 2009-12-06 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5The Red Stack (in Games) Rating: 3.50
Posted on 2009-12-04 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Exclusively Minimum Groups (in Numbers)
Posted on 2009-11-24 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Prime City (in Numbers) Rating: 4.00
Posted on 2009-11-16 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Through the Hole (in Shapes)
Posted on 2009-11-09 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Space Square (in Shapes)
Posted on 2009-11-06 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Two Rolling Balls (in Science) Rating: 3.50
Posted on 2009-11-04 by Brian Smith (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Going Cyclic With Harmonic (in Numbers)
Posted on 2009-11-03 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A Man At The Intersection (in Liars and Knights) Rating: 5.00
Posted on 2009-10-31 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 3 of 54x4 Grid Difference (in Probability)
Posted on 2009-10-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The ants go marching. (in Just Math) Rating: 4.00
Posted on 2009-10-21 by Jer (No Solution Yet, 7 Comments)
Difficulty: 4 of 59 points to convex pentagon (in Shapes)
Posted on 2009-10-12 by Jer (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Pennies = Nickels (in Just Math) Rating: 2.33
Posted on 2009-10-08 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Floating Tangent (in Geometry)
Posted on 2009-10-02 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Fixed length from unit square. (in Shapes) Rating: 5.00
Posted on 2009-10-01 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Double Coverage (in Shapes) Rating: 3.00
Posted on 2009-09-29 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Fractal Sequence (in Sequences)
Posted on 2009-09-18 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Unit lengths from movable points to unit triangles. (in Geometry)
Posted on 2009-09-14 by Jer (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Unit lengths and triangles (in Geometry)
Posted on 2009-09-09 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5More Consecutive Semiprimes (in Numbers)
Posted on 2009-09-08 by Larry (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Minimum Value With Ratio (in Just Math)
Posted on 2009-09-07 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Minimum Scrabble (in Word Problems)
Posted on 2009-09-02 by brianjn (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Rotate the Outer (in Numbers)
Posted on 2009-08-30 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Triangulating a Square (in Numbers)
Posted on 2009-08-26 by brianjn (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Priming a Square (in Numbers) Rating: 3.00
Posted on 2009-08-23 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5The Shadow in a Sphere (in Shapes) Rating: 4.00
Posted on 2009-08-19 by Chris, PhD (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Random x Random (in Calculus) Rating: 4.00
Posted on 2009-08-17 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Pan Shared (in Just Math) Rating: 5.00
Posted on 2009-07-22 by brianjn (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Reverse Partridge Pandigital Set (in Numbers)
Posted on 2009-07-09 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Bounded Sine (in Shapes)
Posted on 2009-06-23 by Jer (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Duality (in Cryptography) Rating: 5.00
Posted on 2009-06-21 by brianjn (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Shell Game (in Sequences)
Posted on 2009-06-18 by brianjn (No Solution Yet, 4 Comments)
Difficulty: 3 of 55 Cards Magic Trick Redux (in Logic)
Posted on 2009-06-05 by Assaf (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Lights switched (in Logic)
Posted on 2009-06-03 by Jer (No Solution Yet, 5 Comments)
Difficulty: 4 of 5The 5 cards Magic trick Rechallenges! (in Logic)
Posted on 2009-06-01 by Assaf (No Solution Yet, 4 Comments)
Difficulty: 4 of 55 Cards Magic Trick (in Logic) Rating: 4.67
Posted on 2009-05-29 by Assaf (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Bulbs and Switches II (in Probability)
Posted on 2009-05-22 by Praneeth (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Magic Trick (in Numbers) Rating: 5.00
Posted on 2009-05-10 by Praneeth (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Bouncy Bouncy Part 3 (in Geometry)
Posted on 2009-05-04 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Factorials and Powers (in Just Math) Rating: 4.00
Posted on 2009-04-22 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Hands On A Clock Part 2 (in General) Rating: 3.00
Posted on 2009-04-10 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Broken Keyboard (in Numbers) Rating: 3.00
Posted on 2009-04-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fifth root (cubic) = Cube root (quintic) (in Just Math)
Posted on 2009-04-05 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Derivative chains. (in Calculus)
Posted on 2009-03-29 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Harry Trotter and the Cinnamon Swirls (in Cryptography)
Posted on 2009-03-21 by rod hines (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Skyscraper Counting (in Numbers)
Posted on 2009-03-16 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Trying triangles (in Geometry) Rating: 4.00
Posted on 2009-03-10 by rod hines (No Solution Yet, 2 Comments)
Difficulty: 2 of 5MineSweeper (in Games)
Posted on 2009-02-16 by Praneeth (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Perfect Pairs (in Probability) Rating: 3.00
Posted on 2009-02-11 by Chris, PhD (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Lucky and Unlucky Numbers (in Liars and Knights) Rating: 4.67
Posted on 2009-02-01 by Praneeth (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Multipan Balance (in Weights and Scales) Rating: 3.00
Posted on 2009-01-18 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Historical Record (in Word Problems) Rating: 4.00
Posted on 2009-01-14 by brianjn (No Solution Yet, 7 Comments)
Difficulty: 3 of 5The great tunnel switch II (in Algorithms) Rating: 3.00
Posted on 2008-12-26 by Gamer (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Boats (in Just Math)
Posted on 2008-12-22 by alex (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Defective Bulbs (in Just Math) Rating: 3.00
Posted on 2008-12-12 by Praneeth (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Prime Central (in Numbers)
Posted on 2008-12-10 by brianjn (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Prime all (in Numbers)
Posted on 2008-12-01 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5The Courier (in Logic) Rating: 4.50
Posted on 2008-11-21 by brianjn (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Choreography (in Numbers) Rating: 3.00
Posted on 2008-11-19 by brianjn (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Freecell Addiction (in Probability) Rating: 5.00
Posted on 2008-10-26 by Leming (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Going maximum with factorial(s) (in Just Math) Rating: 5.00
Posted on 2008-10-24 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The great tunnel switch (in General) Rating: 4.00
Posted on 2008-09-14 by Gamer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Use the stairs! (in Just Math) Rating: 4.50
Posted on 2008-09-12 by Andre (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Somewhere Near the Center (in Shapes) Rating: 3.50
Posted on 2008-09-09 by Leming (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Checker Masks (in Word Problems)
Posted on 2008-09-04 by brianjn (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Suspects and Investigations (in Just Math) Rating: 1.00
Posted on 2008-08-29 by Praneeth (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Cube*Linear = Square*Cube (in Just Math)
Posted on 2008-08-09 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Quadrilateral Sine Inequality (in Just Math)
Posted on 2008-08-05 by Jonathan Lindgren (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Extended Knight's Tour (in Logic) Rating: 4.50
Posted on 2008-07-10 by Josie Faulkner (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Floors and decimals integral (in Calculus) Rating: 3.00
Posted on 2008-07-06 by Jonathan Lindgren (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No. of Distinct Solutions(1) (in Just Math) Rating: 3.50
Posted on 2008-07-05 by Praneeth (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Sliding blocks (in Science)
Posted on 2008-06-29 by Jonathan Lindgren (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Double differential equation (in Calculus) Rating: 2.50
Posted on 2008-06-26 by Jonathan Lindgren (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Killer-X-tra (2) (in Logic) Rating: 4.75
Posted on 2008-06-20 by Josie Faulkner (No Solution Yet, 17 Comments)
Difficulty: 4 of 5Polynomial And Integer Coefficients (in Just Math) Rating: 2.00
Posted on 2008-06-13 by K Sengupta (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Killer-X-tra (in Logic) Rating: 3.50
Posted on 2008-05-27 by Josie Faulkner (No Solution Yet, 20 Comments)
Difficulty: 1 of 51,000 (in Tricks) Rating: 1.20
Posted on 2008-04-28 by Brian Smith (No Solution Yet, 18 Comments)
Difficulty: 2 of 5Rumor Rithmetic (in Numbers) Rating: 2.75
Posted on 2008-04-25 by Dennis (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Two Couples (in Numbers) Rating: 3.00
Posted on 2008-04-22 by Josie Faulkner (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Sum of Powers (in Numbers) Rating: 4.00
Posted on 2008-04-21 by Brian Smith (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Stella and the Statistical Six (in Just Math) Rating: 4.00
Posted on 2008-04-18 by Paul (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Trapezoid Proof (in Geometry) Rating: 2.50
Posted on 2008-04-17 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 4 of 5A rectangle Around A rhombus (in Geometry) Rating: 3.50
Posted on 2008-04-14 by Brian Smith (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Rigidly Placed Polyominos (in Shapes) Rating: 4.00
Posted on 2008-04-10 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Broken Lights Out (in Logic) Rating: 3.00
Posted on 2008-04-07 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Dao Juxing (The way of the rectangle) (in Shapes) Rating: 3.00
Posted on 2008-03-28 by FrankM (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Animal Magic (in Numbers) Rating: 3.00
Posted on 2008-03-21 by Josie Faulkner (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Three Points in a Square (in Probability) Rating: 4.00
Posted on 2008-03-17 by Brian Smith (No Solution Yet, 18 Comments)
Difficulty: 3 of 5ABCD (2) (in Logic) Rating: 4.17
Posted on 2008-03-07 by Josie Faulkner (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Killer Skyscrapers (in Logic)
Posted on 2008-02-20 by Josie Faulkner (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Colourful Knight's Tour (in Logic) Rating: 4.91
Posted on 2008-01-24 by Josie Faulkner (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Everybody Holds Hands (in Shapes) Rating: 4.50
Posted on 2008-01-22 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Centroid And Summed Ratios (in Geometry)
Posted on 2008-01-17 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 1 of 5It's right really (in Word Problems)
Posted on 2008-01-01 by Paddy (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Guess the date (in Algorithms) Rating: 4.00
Posted on 2007-12-30 by Paddy (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Bridge Probabilities (in Probability)
Posted on 2007-12-27 by Rob (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Circles around Circles (in Geometry) Rating: 3.75
Posted on 2007-12-23 by Leming (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Water Cocoon - Defying Newton (in Science) Rating: 4.00
Posted on 2007-12-09 by brianjn (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Cyclic Hexagon And Ratio (in Geometry) Rating: 4.00
Posted on 2007-12-08 by K Sengupta (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Wise Wizard (in Riddles) Rating: 2.67
Posted on 2007-12-02 by Katwoman (No Solution Yet, 18 Comments)
Difficulty: 4 of 5Laser Reconstruction: 7 targets and 3 mirrors (in General) Rating: 3.00
Posted on 2007-11-25 by Brian Smith (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Old Man's Riddle (in Riddles) Rating: 4.50
Posted on 2007-11-01 by Leming (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Rational Quadrilateral? (in Geometry)
Posted on 2007-10-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Divisible for every n (in Numbers)
Posted on 2007-10-11 by Praneeth (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Tangent And Geometric Sequence (in Geometry)
Posted on 2007-09-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Letter Shifted Palindromes (in Word Problems) Rating: 4.00
Posted on 2007-09-08 by Vernon Lewis (No Solution Yet, 5 Comments)
Difficulty: 3 of 5On a Grid 2 (in Logic) Rating: 4.40
Posted on 2007-08-29 by Brian Smith (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Slice a Circle to fit a Rectangle (in Shapes) Rating: 4.17
Posted on 2007-08-22 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5On a Grid (in Logic) Rating: 4.25
Posted on 2007-08-08 by Brian Smith (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Spies Like Us (in General) Rating: 3.50
Posted on 2007-07-30 by Gamer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quadruple Agent (in Probability) Rating: 2.33
Posted on 2007-07-25 by Gamer (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Sum of all solutions (in Just Math) Rating: 4.50
Posted on 2007-07-20 by Praneeth (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Greaterdoku (in General) Rating: 4.83
Posted on 2007-07-15 by Federico Kereki (No Solution Yet, 12 Comments)
Difficulty: 1 of 5Know yourself (in Liars and Knights) Rating: 4.00
Posted on 2007-07-06 by Federico Kereki (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Winter Reigns (in General) Rating: 4.00
Posted on 2007-07-02 by John Reid (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Crossnumber (in Numbers) Rating: 4.38
Posted on 2007-07-01 by Josie Faulkner (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A grok is a grok is a ... ? (in Liars and Knights) Rating: 3.00
Posted on 2007-06-29 by Federico Kereki (No Solution Yet, 11 Comments)
Difficulty: 4 of 5The Pace of the Race (in Probability) Rating: 3.50
Posted on 2007-06-19 by Leming (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Triple Convergence (in Algorithms) Rating: 4.00
Posted on 2007-06-08 by Federico Kereki (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Face up Poker (in Games) Rating: 3.00
Posted on 2007-06-04 by e.g. (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Some Hardy Ramanujan variants (in Numbers) Rating: 3.00
Posted on 2007-06-02 by Federico Kereki (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Three different trails (in Logic) Rating: 3.00
Posted on 2007-05-31 by Assaf (No Solution Yet, 6 Comments)
Difficulty: 3 of 5An apple (or more) a day... (in Numbers) Rating: 4.00
Posted on 2007-05-28 by Federico Kereki (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Mean, Median, and Mode (in General) Rating: 3.00
Posted on 2007-05-24 by Dennis (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Mean Sequence (in Sequences) Rating: 3.67
Posted on 2007-05-23 by Dennis (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Pushing Numbers 2 (in Logic) Rating: 3.50
Posted on 2007-05-22 by Assaf (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Falling through the floor (in Probability)
Posted on 2007-05-18 by Jer (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Well Balanced Letter: F (in Shapes) Rating: 4.00
Posted on 2007-05-16 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Magic trick (in General) Rating: 4.17
Posted on 2007-05-11 by atheron (No Solution Yet, 51 Comments)
Difficulty: 2 of 5Well Balanced Letter: C (in Shapes) Rating: 2.00
Posted on 2007-05-10 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Well Balanced Letter: V (in Shapes) Rating: 4.00
Posted on 2007-05-07 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Two Trains (in Just Math) Rating: 4.25
Posted on 2007-05-05 by hoodat (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Well Balanced Letter: E (in Shapes) Rating: 4.33
Posted on 2007-04-30 by Jer (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Greater Than Game (in Games) Rating: 3.33
Posted on 2007-04-24 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 2 of 5I'm fun for everyone (in Riddles) Rating: 2.89
Posted on 2007-04-23 by Katwoman (No Solution Yet, 23 Comments)
Difficulty: 3 of 5Alternating sextet (in Sequences)
Posted on 2007-03-30 by e.g. (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Chop it off (in Numbers) Rating: 4.00
Posted on 2007-03-27 by e.g. (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Surprising Sudden Square (in Numbers)
Posted on 2007-03-24 by Old Original Oskar! (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Appropriate Area (in Numbers)
Posted on 2007-03-21 by Gamer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Front to back (in Numbers)
Posted on 2007-03-18 by Gamer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Another deadman in Knavesville (in Liars and Knights) Rating: 2.00
Posted on 2007-03-08 by Syzygy (No Solution Yet, 14 Comments)
Difficulty: 2 of 5The Cross in the Trapezoid (in Geometry) Rating: 2.00
Posted on 2007-03-03 by hoodat (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Volume of a Cuboid (in Geometry) Rating: 2.00
Posted on 2007-03-02 by Ansh (No Solution Yet, 7 Comments)
Difficulty: 5 of 5Cutting Corners (in Geometry) Rating: 5.00
Posted on 2007-02-27 by Art M (No Solution Yet, 22 Comments)
Difficulty: 2 of 5Tough Negotiations (in Numbers)
Posted on 2007-02-27 by Art M (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Special indices (in Just Math) Rating: 3.00
Posted on 2007-02-26 by Ansh (No Solution Yet, 4 Comments)
Difficulty: 3 of 5TexMex Take-out (in Probability) Rating: 4.50
Posted on 2007-02-25 by hoodat (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Tile Challenge (in Logic) Rating: 2.40
Posted on 2007-02-24 by Vernon Lewis (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Widescreen vs traditional (in Just Math) Rating: 2.33
Posted on 2007-02-23 by Ansh (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Bigger or Smaller?? (in Numbers) Rating: 1.75
Posted on 2007-02-22 by Ansh (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Urn, urn, urn (in Probability) Rating: 5.00
Posted on 2007-02-20 by Jer (No Solution Yet, 5 Comments)
Difficulty: 1 of 5My riddle #1 (in Riddles) Rating: 1.88
Posted on 2007-02-18 by 11324789 (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Name this city (in General) Rating: 3.00
Posted on 2007-02-15 by Art M (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Painted Sphere (in Geometry) Rating: 4.00
Posted on 2007-02-13 by Art M (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Train Station (in Just Math) Rating: 2.00
Posted on 2007-02-11 by Art M (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Arabian Nights (in Numbers) Rating: 3.33
Posted on 2007-02-06 by Art M (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Prison Challenge (in Just Math) Rating: 3.67
Posted on 2007-02-05 by Art M (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Connecting the Points (in General) Rating: 4.00
Posted on 2007-02-04 by Dennis (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Internal Triangle Problem (in Geometry) Rating: 4.00
Posted on 2007-02-02 by David Johnson (No Solution Yet, 4 Comments)
Difficulty: 3 of 52007 intersections (in Geometry) Rating: 3.67
Posted on 2007-02-01 by Art M (No Solution Yet, 4 Comments)
Difficulty: 4 of 5How many solutions? (in Just Math) Rating: 3.75
Posted on 2007-01-31 by Art M (No Solution Yet, 4 Comments)
Difficulty: 4 of 5One Away III (in Cryptography) Rating: 4.00
Posted on 2007-01-30 by Gamer (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Fatal Guess (in Probability) Rating: 3.71
Posted on 2007-01-29 by atheron (No Solution Yet, 15 Comments)
Difficulty: 2 of 5Numbered Cube (in Numbers) Rating: 4.00
Posted on 2007-01-26 by atheron (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Difficulties with hotel rooms (in General) Rating: 4.00
Posted on 2007-01-25 by atheron (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Factors and Primes (in Numbers) Rating: 4.67
Posted on 2007-01-24 by atheron (No Solution Yet, 4 Comments)
Difficulty: 3 of 512 digit number (in Numbers)
Posted on 2007-01-22 by atheron (No Solution Yet, 3 Comments)
Difficulty: 3 of 5What's Next? 2 (in Sequences)
Posted on 2007-01-13 by Dustin (No Solution Yet, 5 Comments)
Difficulty: 3 of 5A Factorial Evaluation (in Just Math)
Posted on 2007-01-12 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Divisibility (in Numbers)
Posted on 2007-01-08 by atheron (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Number power (in Numbers) Rating: 4.00
Posted on 2006-12-30 by atheron (No Solution Yet, 5 Comments)
Difficulty: 5 of 5The art of fencing (in Shapes) Rating: 3.00
Posted on 2006-12-27 by JLo (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Box it up (in General) Rating: 4.20
Posted on 2006-12-26 by Gamer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Component X (in General)
Posted on 2006-12-18 by Gamer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5The Game (in Paradoxes) Rating: 4.00
Posted on 2006-12-14 by Rob (No Solution Yet, 22 Comments)
Difficulty: 4 of 5One equation with nine unknowns! (in Numbers) Rating: 4.20
Posted on 2006-12-13 by John Reid (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Row on Row (in General) Rating: 3.50
Posted on 2006-12-11 by Haruki (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Floor function and primes (in Numbers)
Posted on 2006-12-09 by atheron (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Colourful set (in Sequences) Rating: 4.25
Posted on 2006-12-06 by atheron (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Crash Course (in General) Rating: 4.14
Posted on 2006-12-01 by Gamer (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Sum crazy dice (in Probability) Rating: 5.00
Posted on 2006-11-30 by Jer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Floating Gracefully (in Riddles) Rating: 3.50
Posted on 2006-11-27 by Daniel (No Solution Yet, 25 Comments)
Difficulty: 3 of 5Queen Square II (in Algorithms) Rating: 4.33
Posted on 2006-11-22 by Gamer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Arbitrary Adventures Analysis (in General) Rating: 4.00
Posted on 2006-11-20 by Old Original Oskar! (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Custom Dice (in Probability) Rating: 4.00
Posted on 2006-11-16 by TamTam (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Rooms (in Tricks) Rating: 3.75
Posted on 2006-11-13 by Lillian (No Solution Yet, 17 Comments)
Difficulty: 2 of 5Nets, Sectors and Cones (in Geometry) Rating: 4.33
Posted on 2006-11-12 by Ansh (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Hoop Dreams (in Science) Rating: 4.00
Posted on 2006-11-10 by Larry (No Solution Yet, 2 Comments)
Difficulty: 3 of 5The Holy Cannoli (in Shapes) Rating: 4.50
Posted on 2006-11-01 by Larry (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Threes and sevens (in Numbers) Rating: 2.50
Posted on 2006-10-25 by vswitchs (No Solution Yet, 7 Comments)
Difficulty: 5 of 5Super-smooth hump (in Calculus) Rating: 4.33
Posted on 2006-10-24 by vswitchs (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Let them eat cake (in Geometry) Rating: 4.00
Posted on 2006-10-23 by Gamer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Knot me ! (in General) Rating: 3.50
Posted on 2006-10-22 by Salil (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Faraday's experiment (in Science) Rating: 4.00
Posted on 2006-10-20 by atheron (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Looking for functions (in Just Math) Rating: 3.20
Posted on 2006-10-18 by atheron (No Solution Yet, 8 Comments)
Difficulty: 5 of 5Radioactive Coins (in Weights and Scales) Rating: 4.50
Posted on 2006-10-17 by David Shin (No Solution Yet, 20 Comments)
Difficulty: 3 of 5Sesquipedalian & Three-Quarter Ranch (in General) Rating: 3.00
Posted on 2006-10-15 by Salil (No Solution Yet, 6 Comments)
Difficulty: 3 of 5The digits and square numbers (in Numbers)
Posted on 2006-10-12 by Salil (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Puzzle of Sphinx (in Geometry) Rating: 3.00
Posted on 2006-10-11 by Salil (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Spoons (in Logic) Rating: 4.33
Posted on 2006-10-10 by joshua (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Miss Etticoat (in Riddles) Rating: 4.17
Posted on 2006-10-06 by Samuel Ballard (No Solution Yet, 43 Comments)
Difficulty: 4 of 5Lego query (in Games) Rating: 3.25
Posted on 2006-10-05 by joshua (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Parchment Puzzle (in Word Problems)
Posted on 2006-10-05 by joshua (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Consumer Mathematics - Compound Interest (in Just Math) Rating: 3.75
Posted on 2006-10-04 by Chris, PhD (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Oddwins (in Games) Rating: 4.00
Posted on 2006-10-03 by Salil (No Solution Yet, 11 Comments)
Difficulty: 2 of 5Those infinite small steps (in Just Math) Rating: 3.67
Posted on 2006-10-03 by Art M (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Corker (in Science) Rating: 4.33
Posted on 2006-10-02 by Salil (No Solution Yet, 15 Comments)
Difficulty: 2 of 5The Bucket (in Science) Rating: 3.00
Posted on 2006-09-28 by Salil (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Pretty Picture (in Logic) Rating: 3.67
Posted on 2006-09-27 by Salil (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Shape Code (in Cryptography)
Posted on 2006-09-22 by Salil (No Solution Yet, 10 Comments)
Difficulty: 5 of 5Can you match them up? (in Just Math)
Posted on 2006-09-21 by JLo (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Magic 8's (in Numbers) Rating: 4.00
Posted on 2006-09-18 by joshua (No Solution Yet, 8 Comments)
Difficulty: 3 of 5nonsense phrase (in Cryptography) Rating: 3.00
Posted on 2006-09-15 by bookworm (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Evil character (in Word Problems) Rating: 3.00
Posted on 2006-09-11 by bookworm (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Numbers of letters of numbers of letters of... (in Sequences) Rating: 3.50
Posted on 2006-09-10 by Alexis (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Life is full of me! (in Famous Riddles) Rating: 3.50
Posted on 2006-09-07 by bookworm (No Solution Yet, 19 Comments)
Difficulty: 2 of 5Freecell (in Just Math)
Posted on 2006-09-06 by Cory Taylor (No Solution Yet, 7 Comments)
Difficulty: 3 of 5divisible by 11? (in Numbers) Rating: 3.50
Posted on 2006-09-04 by Bon (No Solution Yet, 17 Comments)
Difficulty: 4 of 5The gardener's woe is continuous (in Just Math)
Posted on 2006-08-30 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Can you find this kind of function? (in Tricks) Rating: 3.50
Posted on 2006-08-28 by atheron (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Five Circle Division (in Geometry)
Posted on 2006-08-26 by Salil (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Are all complex numbers real? (in Paradoxes) Rating: 3.75
Posted on 2006-08-24 by atheron (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Square division (in Logic) Rating: 4.00
Posted on 2006-08-24 by Salil (No Solution Yet, 13 Comments)
Difficulty: 3 of 5LCM Sequence (in Sequences) Rating: 4.00
Posted on 2006-08-19 by atheron (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Points on a plane (in Geometry) Rating: 4.00
Posted on 2006-08-18 by atheron (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Must you overanalyze everything? (in Sequences) Rating: 4.33
Posted on 2006-08-18 by Alexis (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Picking cards (in Probability) Rating: 3.00
Posted on 2006-08-17 by atheron (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Procrastination (in Riddles) Rating: 3.38
Posted on 2006-08-16 by Kevin (No Solution Yet, 48 Comments)
Difficulty: 4 of 5Jargon? (in Cryptography) Rating: 2.00
Posted on 2006-08-15 by Kevin (No Solution Yet, 9 Comments)
Difficulty: 5 of 5Logicians, hats, and numbers (in Logic) Rating: 3.90
Posted on 2006-08-14 by Avin (No Solution Yet, 21 Comments)
Difficulty: 3 of 5beheaded for benefits (in Riddles) Rating: 3.50
Posted on 2006-08-14 by bookworm (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Card game (in Games) Rating: 4.00
Posted on 2006-08-12 by atheron (No Solution Yet, 8 Comments)
Difficulty: 2 of 5The Family Recipes (in Logic) Rating: 4.50
Posted on 2006-08-11 by trey (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Circular Logic III (in Geometry)
Posted on 2006-08-09 by Gamer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Opposites Attract (in Word Problems) Rating: 4.33
Posted on 2006-08-08 by tanx (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Further Arithmetic Integers II (in Numbers) Rating: 5.00
Posted on 2006-08-04 by Daniel (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Inequality (in Calculus)
Posted on 2006-08-03 by atheron (No Solution Yet, 3 Comments)
Difficulty: 3 of 53D Engineering problem (in Shapes) Rating: 4.00
Posted on 2006-08-02 by Salil (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Object sliding (in Science) Rating: 4.00
Posted on 2006-08-01 by atheron (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Chess Strategy (in Logic) Rating: 3.29
Posted on 2006-08-01 by Salil (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Tricky Ten Digit Number (in Numbers) Rating: 4.50
Posted on 2006-07-31 by Yosippavar (No Solution Yet, 11 Comments)
Difficulty: 3 of 5A deceiving riddle (in Riddles) Rating: 3.22
Posted on 2006-07-31 by Arghman (No Solution Yet, 36 Comments)
Difficulty: 3 of 5Criminals Around Table (in Logic) Rating: 3.00
Posted on 2006-07-27 by Yosippavar (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Find All Numbers (in Just Math) Rating: 5.00
Posted on 2006-07-25 by Ravi Raja (No Solution Yet, 8 Comments)
Difficulty: 2 of 5A thing that nothing is (in Riddles) Rating: 2.67
Posted on 2006-07-25 by Genesis Rowley (No Solution Yet, 19 Comments)
Difficulty: 3 of 5Cube first, or square second (in Numbers) Rating: 4.29
Posted on 2006-07-22 by Jer (No Solution Yet, 7 Comments)
Difficulty: 4 of 5202001221220110111011000 (in Cryptography) Rating: 5.00
Posted on 2006-07-21 by Gamer (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Mountains and Valleys (in Shapes) Rating: 2.50
Posted on 2006-07-19 by Jer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5What is common? (in Word Problems) Rating: 2.80
Posted on 2006-07-18 by Salil (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Land of Zoz (in Liars and Knights) Rating: 3.33
Posted on 2006-07-17 by Salil (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Hats and alligators (in Logic) Rating: 4.40
Posted on 2006-07-15 by JayDeeKay (No Solution Yet, 19 Comments)
Difficulty: 3 of 5Time to run out water (in Science) Rating: 1.25
Posted on 2006-07-13 by Salil (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Chain Production (in Cryptography) Rating: 4.00
Posted on 2006-07-13 by Gamer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Spider Strolls (in Geometry) Rating: 2.00
Posted on 2006-07-12 by Salil (No Solution Yet, 7 Comments)
Difficulty: 3 of 5First Impressions (in Cryptography) Rating: 3.00
Posted on 2006-07-10 by Gamer (No Solution Yet, 16 Comments)
Difficulty: 3 of 5Multiplication Table (in Numbers) Rating: 3.00
Posted on 2006-07-07 by tomarken (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Which is Which (in Weights and Scales) Rating: 3.00
Posted on 2006-07-07 by Salil (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Census of a Village (in General) Rating: 1.00
Posted on 2006-07-06 by (No Solution Yet, 2 Comments)
Difficulty: 2 of 5WWW (in Just Math) Rating: 3.33
Posted on 2006-07-04 by alex (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Brother of Ages (in General) Rating: 3.00
Posted on 2006-07-03 by Rachael (No Solution Yet, 8 Comments)
Difficulty: 5 of 5The Domino Theory (in Science) Rating: 3.50
Posted on 2006-06-28 by Haruki (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Rising water levels (in Shapes) Rating: 4.17
Posted on 2006-06-26 by Jer (No Solution Yet, 26 Comments)
Difficulty: 3 of 5Palindromic number counting (in Numbers) Rating: 3.67
Posted on 2006-06-22 by Sir Percivale (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Covering a circle (extended mix) (in Shapes) Rating: 4.00
Posted on 2006-06-20 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Three Intercepts (in Just Math) Rating: 2.00
Posted on 2006-06-19 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Pythagorean chain converse (in Shapes)
Posted on 2006-06-16 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Black and white hats (in Logic) Rating: 3.89
Posted on 2006-06-15 by Sir Percivale (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Trig meets Logs (in Numbers) Rating: 3.00
Posted on 2006-06-14 by Jer (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Pills they had 2 (in Logic)
Posted on 2006-06-13 by Salil (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Infinite Tic-Tac-Toe (in Games) Rating: 3.00
Posted on 2006-06-09 by tomarken (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Happy Birthday (3) (in Probability) Rating: 4.00
Posted on 2006-06-09 by Sir Percivale (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Trading Places 2D (in Algorithms)
Posted on 2006-06-07 by Sir Percivale (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The Island of Masyu (in Logic) Rating: 3.00
Posted on 2006-06-06 by Dej Mar (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Trading Places 2 (in General) Rating: 4.00
Posted on 2006-05-30 by Sir Percivale (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Polynomial # 1 (in Just Math) Rating: 5.00
Posted on 2006-05-26 by Ravi Raja (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Pills they had (in Logic) Rating: 3.00
Posted on 2006-05-23 by Salil (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Game Over! (in Probability) Rating: 3.50
Posted on 2006-05-22 by tomarken (No Solution Yet, 15 Comments)
Difficulty: 2 of 5Triggy Trigonometry (in Geometry) Rating: 3.33
Posted on 2006-05-20 by Chris, PhD (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Least L.C.M. (in Just Math) Rating: 3.00
Posted on 2006-05-19 by Ravi Raja (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Mutually disagreeing queens. (in General) Rating: 4.00
Posted on 2006-05-19 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Kakuro, Sudoku AND Hanji combined (in Logic) Rating: 4.25
Posted on 2006-05-16 by Sir Percivale (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Find 'K' (in Just Math) Rating: 3.00
Posted on 2006-05-15 by Ravi Raja (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find the value of ...... (in Just Math) Rating: 4.00
Posted on 2006-05-14 by Ravi Raja (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Prime Factor (in Just Math) Rating: 3.33
Posted on 2006-05-12 by Ravi Raja (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Bit by Bit (in Cryptography) Rating: 4.25
Posted on 2006-05-12 by Gamer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Elemental chain of events (in Word Problems) Rating: 4.00
Posted on 2006-05-11 by Leming (No Solution Yet, 4 Comments)
Difficulty: 4 of 5First Supreme Syllable (in Riddles) Rating: 2.38
Posted on 2006-05-09 by Wendy (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Perfect Square (in Just Math) Rating: 3.00
Posted on 2006-05-07 by Ravi Raja (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Remainder: Part 2 (in Just Math) Rating: 2.50
Posted on 2006-05-02 by Ravi Raja (No Solution Yet, 5 Comments)
Difficulty: 3 of 5They do it with mirrors (in Science) Rating: 3.80
Posted on 2006-04-26 by goFish (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Three from Nine (in Probability) Rating: 3.50
Posted on 2006-04-25 by Vernon Lewis (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Cristofori meets Newton (in Cryptography) Rating: 4.13
Posted on 2006-04-22 by Highway6 (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Lim and Jill (in Riddles) Rating: 3.00
Posted on 2006-04-21 by Wendy (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Classical Rules 2 (in Numbers) Rating: 4.00
Posted on 2006-04-20 by goFish (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Walking the Edge Part 2 (in Shapes) Rating: 5.00
Posted on 2006-04-20 by Jer (No Solution Yet, 8 Comments)
Difficulty: 1 of 5Padre (in Famous Riddles) Rating: 3.30
Posted on 2006-04-19 by pinky (No Solution Yet, 27 Comments)
Difficulty: 3 of 5Walking the Edge (in Shapes)
Posted on 2006-04-18 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Classical Rules 1 (in Numbers) Rating: 3.50
Posted on 2006-04-17 by goFish (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Which Biblical figure? (in Cryptography) Rating: 4.00
Posted on 2006-04-12 by Diana (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Austin Ruth (in Sequences) Rating: 4.00
Posted on 2006-04-08 by Mindrod (No Solution Yet, 10 Comments)
Difficulty: 1 of 5Super Pawn (in General) Rating: 2.00
Posted on 2006-04-07 by Wallace North (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Latin Square (in Logic) Rating: 3.50
Posted on 2006-04-04 by Sir Percivale (No Solution Yet, 5 Comments)
Difficulty: 2 of 5The Dilemma of a Prisoner part 2 (in Tricks) Rating: 3.00
Posted on 2006-03-31 by SeaCalMaster (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Walking down an escalator (in General) Rating: 3.33
Posted on 2006-03-29 by Jer (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Crossed Equations (in Just Math) Rating: 2.67
Posted on 2006-03-28 by Sir Percivale (No Solution Yet, 4 Comments)
Difficulty: 3 of 53 grandfather clock problems (in General) Rating: 3.50
Posted on 2006-03-27 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Lazy Tennis (in Games) Rating: 4.33
Posted on 2006-03-27 by Chris, PhD (No Solution Yet, 25 Comments)
Difficulty: 3 of 5Dominoes (in Logic) Rating: 3.33
Posted on 2006-03-24 by Sir Percivale (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Bouncy Bouncy revisited (in Just Math) Rating: 1.50
Posted on 2006-03-23 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Sequence - 4 (in Sequences) Rating: 2.50
Posted on 2006-03-23 by Ravi Raja (No Solution Yet, 6 Comments)
Difficulty: 3 of 5In the Woods... (in Riddles) Rating: 3.00
Posted on 2006-03-22 by Jak Dakars (No Solution Yet, 50 Comments)
Difficulty: 3 of 5Remainder: Part 1 (in Numbers) Rating: 2.50
Posted on 2006-03-20 by Ravi Raja (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Do not divide! (in Just Math) Rating: 3.00
Posted on 2006-03-18 by Ravi Raja (No Solution Yet, 7 Comments)
Difficulty: 2 of 5How Many Pairs (in Just Math) Rating: 2.50
Posted on 2006-03-14 by Ravi Raja (No Solution Yet, 14 Comments)
Difficulty: 3 of 5and (in Word Problems) Rating: 2.33
Posted on 2006-03-13 by Sir Percivale (No Solution Yet, 28 Comments)
Difficulty: 4 of 5Sum to Infinity - 1 (in Sequences) Rating: 3.71
Posted on 2006-03-11 by Ravi Raja (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Simple Origami? (in Shapes) Rating: 4.00
Posted on 2006-03-07 by Jer (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Cross cut (in Shapes) Rating: 3.25
Posted on 2006-03-06 by Sir Percivale (No Solution Yet, 19 Comments)
Difficulty: 4 of 5Black and White Solids (in Geometry) Rating: 4.00
Posted on 2006-03-04 by Sir Percivale (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Only one colour (in Riddles) Rating: 3.56
Posted on 2006-03-03 by Mish (No Solution Yet, 34 Comments)
Difficulty: 3 of 5Work Safety (in Riddles) Rating: 3.40
Posted on 2006-03-02 by Jessica (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Devils in my stomach (in Cryptography) Rating: 3.71
Posted on 2006-02-26 by Andre (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Angle ABC (in Geometry) Rating: 2.30
Posted on 2006-02-25 by akash (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Wolf in a field (in Algorithms) Rating: 3.00
Posted on 2006-02-23 by goFish (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Another rational cryptarithm (in Just Math) Rating: 2.00
Posted on 2006-02-22 by Ethan (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Making poverty history (in Numbers) Rating: 4.50
Posted on 2006-02-19 by goFish (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Will you see me? (in Riddles) Rating: 4.33
Posted on 2006-02-17 by Enigma (No Solution Yet, 20 Comments)
Difficulty: 2 of 5I don't know. (in Cryptography) Rating: 3.43
Posted on 2006-02-16 by Dustin (No Solution Yet, 53 Comments)
Difficulty: 3 of 5Brothers Karsakov (in Logic) Rating: 3.71
Posted on 2006-02-14 by Vernon Lewis (No Solution Yet, 28 Comments)
Difficulty: 2 of 5Hitori (in Logic) Rating: 3.33
Posted on 2006-02-13 by Sir Percivale (No Solution Yet, 7 Comments)
Difficulty: 3 of 5My embrace (in Riddles) Rating: 3.43
Posted on 2006-02-12 by Dominique (No Solution Yet, 41 Comments)
Difficulty: 3 of 5Snooker table (in Geometry) Rating: 4.00
Posted on 2006-02-11 by Andre (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Square of Triangles (in Shapes) Rating: 2.00
Posted on 2006-02-04 by Josh70679 (No Solution Yet, 21 Comments)
Difficulty: 3 of 5Trisected Triangle (in Just Math) Rating: 4.50
Posted on 2006-02-03 by Chris, PhD (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Without having read Harry Potter, then? ;) (in Famous Riddles) Rating: 2.86
Posted on 2006-02-01 by Enigma (No Solution Yet, 26 Comments)
Difficulty: 1 of 5In the Army (in Riddles) Rating: 2.67
Posted on 2006-02-01 by Enigma (No Solution Yet, 22 Comments)
Difficulty: 3 of 5Dafoe, The Lone Entrepreneur (in Just Math) Rating: 4.00
Posted on 2006-01-30 by Leon (No Solution Yet, 23 Comments)
Difficulty: 4 of 5I See No More Ships (in Geometry) Rating: 4.50
Posted on 2006-01-29 by Sir Percivale (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Dividing the 'erb. (in Logic) Rating: 4.10
Posted on 2006-01-27 by Sir Percivale (No Solution Yet, 61 Comments)
Difficulty: 2 of 5One by one (in Riddles) Rating: 3.88
Posted on 2006-01-18 by Enigma (No Solution Yet, 25 Comments)
Difficulty: 3 of 5Play it again, Sam (in General) Rating: 4.38
Posted on 2006-01-06 by Gamer (No Solution Yet, 25 Comments)
Difficulty: 3 of 5F-A-C-E (in Word Problems) Rating: 3.00
Posted on 2006-01-04 by tanx (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Standing for higher powers (in Riddles) Rating: 3.00
Posted on 2005-12-31 by Enigma (No Solution Yet, 29 Comments)
Difficulty: 3 of 5The Longest Drive (in Science) Rating: 3.50
Posted on 2005-12-26 by Josh70679 (No Solution Yet, 17 Comments)
Difficulty: 4 of 5More Referential Numbers (in Numbers) Rating: 4.00
Posted on 2005-12-10 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Balls in Space (in Geometry) Rating: 4.40
Posted on 2005-12-09 by Andre (No Solution Yet, 12 Comments)
Difficulty: 2 of 5Magic Cubic (in Just Math) Rating: 2.67
Posted on 2005-11-28 by sragen (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Six Squares (in Numbers) Rating: 3.80
Posted on 2005-11-18 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Box bounce (in Geometry) Rating: 4.14
Posted on 2005-11-17 by Sir Percivale (No Solution Yet, 26 Comments)
Difficulty: 5 of 5Centrifugal Balance II (in General) Rating: 4.29
Posted on 2005-10-18 by Brian Smith (No Solution Yet, 30 Comments)
Difficulty: 3 of 5Prisoner's Dilemma (in Games) Rating: 3.00
Posted on 2005-10-06 by Gamer (No Solution Yet, 11 Comments)
Difficulty: 3 of 5ASKY? Code (in Cryptography) Rating: 3.25
Posted on 2005-09-27 by Juggler (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Buddy System (in Just Math) Rating: 4.33
Posted on 2005-09-22 by Sam (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Shorten and halve (in Word Problems) Rating: 4.20
Posted on 2005-09-21 by j441167 (No Solution Yet, 33 Comments)
Difficulty: 2 of 5Try Top Typing! (in Word Problems) Rating: 3.75
Posted on 2005-09-15 by j441167 (No Solution Yet, 20 Comments)
Difficulty: 4 of 5One or Two Fake Coins (in Weights and Scales) Rating: 3.67
Posted on 2005-09-13 by Brian Smith (No Solution Yet, 4 Comments)
Difficulty: 1 of 5what a riddle!! (in Riddles) Rating: 3.21
Posted on 2005-09-11 by j441167 (No Solution Yet, 55 Comments)
Difficulty: 5 of 5Three Balls in a Bowl (in Science) Rating: 3.80
Posted on 2005-09-07 by Bractals (No Solution Yet, 19 Comments)
Difficulty: 5 of 5Riffling Chance (in Probability) Rating: 4.50
Posted on 2005-08-30 by Sam (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Synograms (in Word Problems) Rating: 4.40
Posted on 2005-08-17 by Erik O. (No Solution Yet, 14 Comments)
Difficulty: 1 of 5Inverting Triangles (in Shapes) Rating: 2.14
Posted on 2005-08-15 by Erik O. (No Solution Yet, 15 Comments)
Difficulty: 3 of 5The Grass is Always Greener II (in Paradoxes) Rating: 3.83
Posted on 2005-08-11 by Sam (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Cool Count (in Just Math) Rating: 4.25
Posted on 2005-08-10 by McWorter (No Solution Yet, 8 Comments)
Difficulty: 1 of 5Just Key It In... (in Sequences) Rating: 3.50
Posted on 2005-08-06 by Erik O. (No Solution Yet, 6 Comments)
Difficulty: 1 of 5Another Pattern of Numbers (in Numbers) Rating: 4.00
Posted on 2005-07-29 by Erik O. (No Solution Yet, 17 Comments)
Difficulty: 5 of 5Circle (in Geometry) Rating: 3.67
Posted on 2005-07-28 by nilshady (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Up or down or... (in Science) Rating: 2.33
Posted on 2005-07-22 by nilshady (No Solution Yet, 20 Comments)
Difficulty: 3 of 5My favorite numbers (in Numbers) Rating: 3.50
Posted on 2005-07-22 by Jurgen (No Solution Yet, 13 Comments)
Difficulty: 2 of 5Thirds and Differences (in Numbers) Rating: 3.00
Posted on 2005-07-21 by Erik O. (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Prime square (in Numbers)
Posted on 2005-07-19 by Federico Kereki (No Solution Yet, 10 Comments)
Difficulty: 3 of 5No Incest, Please (in General) Rating: 3.60
Posted on 2005-07-18 by Erik O. (No Solution Yet, 14 Comments)
Difficulty: 1 of 5Double Letters at the Front (in Word Problems) Rating: 2.29
Posted on 2005-07-11 by Erik O. (No Solution Yet, 29 Comments)
Difficulty: 4 of 5Square Power (in Numbers) Rating: 4.50
Posted on 2005-07-10 by Sam (No Solution Yet, 7 Comments)
Difficulty: 3 of 5From a Balloon (in Science) Rating: 3.00
Posted on 2005-07-07 by Erik O. (No Solution Yet, 36 Comments)
Difficulty: 1 of 5Ask for help (in Liars and Knights) Rating: 3.44
Posted on 2005-07-05 by Gamer (No Solution Yet, 41 Comments)
Difficulty: 3 of 5Special Similar Set (in Weights and Scales) Rating: 3.33
Posted on 2005-06-27 by Old Original Oskar! (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Splitting Heirs (in Shapes) Rating: 3.75
Posted on 2005-06-15 by Bryan (No Solution Yet, 11 Comments)
Difficulty: 2 of 52n+1 Statements (in Logic) Rating: 4.00
Posted on 2005-06-13 by Dustin (No Solution Yet, 15 Comments)
Difficulty: 4 of 5An average table (in Just Math) Rating: 4.25
Posted on 2005-06-03 by ronen (No Solution Yet, 10 Comments)
Difficulty: 5 of 5Zimmerman's Family Points (in Shapes) Rating: 4.40
Posted on 2005-05-23 by owl (No Solution Yet, 11 Comments)
Difficulty: 5 of 53 points colinear? No way! (in Just Math) Rating: 3.00
Posted on 2005-05-19 by Corey (No Solution Yet, 14 Comments)
Difficulty: 2 of 5Snow Splash (in Shapes) Rating: 2.75
Posted on 2005-05-15 by Gamer (No Solution Yet, 8 Comments)
Difficulty: 5 of 5Rational sine (in Just Math) Rating: 5.00
Posted on 2005-05-02 by lmnop (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Pool Ball (in Games) Rating: 4.00
Posted on 2005-04-28 by Juggler (No Solution Yet, 16 Comments)
Difficulty: 2 of 5Sums and Letters (in Numbers) Rating: 3.00
Posted on 2005-04-27 by Sam (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Fishing Vacation Plans (in Logic) Rating: 3.60
Posted on 2005-04-25 by ron (No Solution Yet, 24 Comments)
Difficulty: 2 of 5Halloween Costumes (in Logic) Rating: 2.22
Posted on 2005-04-20 by ron (No Solution Yet, 49 Comments)
Difficulty: 4 of 5Sphere in Tetrahedron (in Shapes) Rating: 2.50
Posted on 2005-04-19 by joe (No Solution Yet, 7 Comments)
Difficulty: 4 of 5The Midville Muddlers (in Logic) Rating: 3.56
Posted on 2005-04-15 by ron (No Solution Yet, 23 Comments)
Difficulty: 3 of 5Family Values (in Logic) Rating: 3.25
Posted on 2005-03-31 by Juggler (No Solution Yet, 53 Comments)
Difficulty: 3 of 5Equal Diagonals (in Shapes) Rating: 4.50
Posted on 2005-03-16 by Sam (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Tackling a Tall Problem (in Geometry) Rating: 3.60
Posted on 2005-03-11 by Sam (No Solution Yet, 10 Comments)
Difficulty: 5 of 5Sastry's Evil Bisectors (in Geometry) Rating: 4.20
Posted on 2005-03-04 by owl (No Solution Yet, 10 Comments)
Difficulty: 1 of 5Events (in Sequences) Rating: 2.00
Posted on 2005-02-10 by wcaexqdz (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Universal Order (in Sequences) Rating: 3.00
Posted on 2005-02-07 by Juggler (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Rectangular Logic (in Logic) Rating: 3.75
Posted on 2005-01-28 by Sam (No Solution Yet, 52 Comments)
Difficulty: 3 of 5I See No Ships (in Geometry) Rating: 2.75
Posted on 2005-01-23 by Juggler (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Most Letters 2 (in Word Problems) Rating: 3.67
Posted on 2005-01-20 by Juggler (No Solution Yet, 16 Comments)
Difficulty: 2 of 5Squares and Triangles (in Just Math) Rating: 3.00
Posted on 2005-01-18 by Juggler (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Where on Earth II (in Geometry) Rating: 4.00
Posted on 2005-01-16 by Juggler (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Mirror in the bathroom. (in Geometry) Rating: 4.00
Posted on 2005-01-13 by Juggler (No Solution Yet, 12 Comments)
Difficulty: 3 of 5Chord Harmonics (in Just Math) Rating: 4.00
Posted on 2005-01-11 by Juggler (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Rummy Luck (in Probability) Rating: 3.00
Posted on 2005-01-07 by Rob (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Marble-Go-Round (in Probability) Rating: 3.20
Posted on 2004-12-28 by neshal (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Circle and Spots (in Geometry) Rating: 3.00
Posted on 2004-12-27 by SilverKnight (No Solution Yet, 10 Comments)
Difficulty: 4 of 5A Square Problem (in Shapes) Rating: 4.00
Posted on 2004-12-26 by SilverKnight (No Solution Yet, 18 Comments)
Difficulty: 4 of 5Buric's Cube (in General) Rating: 4.22
Posted on 2004-12-22 by SilverKnight (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Knight Moves (in General) Rating: 3.13
Posted on 2004-12-10 by DJ (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Rumor Mill (in Probability) Rating: 4.00
Posted on 2004-12-03 by SilverKnight (No Solution Yet, 14 Comments)
Difficulty: 4 of 5Bully For You (in Shapes) Rating: 4.67
Posted on 2004-12-02 by Juggler (No Solution Yet, 6 Comments)
Difficulty: 5 of 5Ellipses and Circles (in Geometry) Rating: 4.00
Posted on 2004-11-29 by Brian Smith (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Kool Numbers (in Numbers) Rating: 3.00
Posted on 2004-11-15 by SilverKnight (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Tin Can Company (in General) Rating: 2.75
Posted on 2004-11-12 by SilverKnight (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Missing Digits (in Numbers) Rating: 2.80
Posted on 2004-11-10 by Nick Hobson (No Solution Yet, 7 Comments)
Difficulty: 1 of 5Baseball Anyone? (in Just Math) Rating: 2.75
Posted on 2004-11-03 by SilverKnight (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Nice Weather (in Just Math) Rating: 4.00
Posted on 2004-11-02 by SilverKnight (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Exponential Difficulties (in Just Math) Rating: 3.00
Posted on 2004-10-30 by SilverKnight (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Square the Circle (in Geometry) Rating: 3.00
Posted on 2004-10-28 by SilverKnight (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Triangular Coordinates (in Numbers) Rating: 2.67
Posted on 2004-10-26 by Victor Zapana (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Octagon in a Circle (in Geometry) Rating: 3.50
Posted on 2004-10-25 by Victor Zapana (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Two circles (in Geometry) Rating: 3.25
Posted on 2004-10-21 by Federico Kereki (No Solution Yet, 11 Comments)
Difficulty: 3 of 5No Rotation Dissection (in Shapes) Rating: 3.33
Posted on 2004-10-19 by Brian Smith (No Solution Yet, 25 Comments)
Difficulty: 4 of 5Circles Abound (2) (in Geometry) Rating: 3.33
Posted on 2004-10-17 by SilverKnight (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Square Perfection (in Shapes) Rating: 3.50
Posted on 2004-10-16 by Gamer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5The Sum of the Parts Is Less Than And More Than the Parts (in Numbers) Rating: 2.33
Posted on 2004-10-15 by Victor Zapana (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Imperfect Square (in Shapes) Rating: 3.00
Posted on 2004-10-14 by Gamer (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Zquare (in Shapes) Rating: 3.50
Posted on 2004-10-10 by Gamer (No Solution Yet, 23 Comments)
Difficulty: 5 of 5Cube the Cube (in Shapes) Rating: 2.67
Posted on 2004-10-02 by SilverKnight (No Solution Yet, 13 Comments)
Difficulty: 4 of 5Nice View (in Geometry) Rating: 3.17
Posted on 2004-09-29 by SilverKnight (No Solution Yet, 8 Comments)
Difficulty: 5 of 5FIGURE it out (2) (in General) Rating: 4.75
Posted on 2004-09-25 by SilverKnight (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Queen Square (in General) Rating: 4.00
Posted on 2004-09-20 by Gamer (No Solution Yet, 6 Comments)
Difficulty: 5 of 5Partitioning Space (in Geometry) Rating: 4.40
Posted on 2004-09-13 by SilverKnight (No Solution Yet, 13 Comments)
Difficulty: 4 of 5FIGURE it out ! (in General) Rating: 3.33
Posted on 2004-09-10 by SilverKnight (No Solution Yet, 13 Comments)
Difficulty: 2 of 5Whodunit Part 4: Going Shopping (in Logic) Rating: 2.86
Posted on 2004-09-09 by matt runchey (No Solution Yet, 30 Comments)
Difficulty: 4 of 5Circle, Circle, Triangle, Circle! (in Geometry) Rating: 3.56
Posted on 2004-09-08 by SilverKnight (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Partitioning the Regions (in General) Rating: 4.00
Posted on 2004-08-23 by SilverKnight (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Whodunit Part 3: Speeding Along (in Logic) Rating: 1.43
Posted on 2004-08-20 by matt runchey (No Solution Yet, 33 Comments)
Difficulty: 5 of 5Unique Necklaces (in General) Rating: 4.00
Posted on 2004-08-18 by SilverKnight (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Explicitly Stated (in Sequences) Rating: 4.00
Posted on 2004-08-18 by Gamer (No Solution Yet, 11 Comments)
Difficulty: 4 of 5Angry Friends (in Geometry) Rating: 3.86
Posted on 2004-08-17 by ThoughtProvoker (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Whodunit Part 2: Places, Places (in Logic) Rating: 3.55
Posted on 2004-08-16 by matt runchey (No Solution Yet, 21 Comments)
Difficulty: 4 of 5Points On A Circle (in Geometry) Rating: 4.43
Posted on 2004-08-14 by ThoughtProvoker (No Solution Yet, 17 Comments)
Difficulty: 2 of 5Two Crescents (in Geometry) Rating: 3.20
Posted on 2004-08-11 by ThoughtProvoker (No Solution Yet, 15 Comments)
Difficulty: 5 of 5Converging Circumference (in General) Rating: 2.75
Posted on 2004-08-09 by ThoughtProvoker (No Solution Yet, 5 Comments)
Difficulty: 4 of 5A Cute Dissection (in Geometry) Rating: 2.75
Posted on 2004-08-06 by SilverKnight (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Pile of Cannonballs (in General) Rating: 3.00
Posted on 2004-08-03 by ThoughtProvoker (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Three Circles (in Geometry) Rating: 3.00
Posted on 2004-07-28 by ThoughtProvoker (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Four Corners (in Algorithms) Rating: 4.25
Posted on 2004-07-17 by red_sox_fan_032003 (No Solution Yet, 7 Comments)
Difficulty: 4 of 5A Point and a Cube (in Geometry) Rating: 4.00
Posted on 2004-07-16 by Brian Smith (No Solution Yet, 23 Comments)
Difficulty: 2 of 5Power of Multiplication (in Numbers) Rating: 4.00
Posted on 2004-07-16 by red_sox_fan_032003 (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Fingers game (in Games) Rating: 4.00
Posted on 2004-07-11 by Sam (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Poker Hands (in Probability) Rating: 3.00
Posted on 2004-07-09 by Thalamus (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Hands On A Clock (in General) Rating: 3.50
Posted on 2004-07-05 by SilverKnight (No Solution Yet, 23 Comments)
Difficulty: 5 of 5Parking Cars (in Probability) Rating: 4.33
Posted on 2004-07-01 by SilverKnight (No Solution Yet, 15 Comments)
Difficulty: 3 of 5All Wired Up (in Logic) Rating: 2.75
Posted on 2004-06-30 by Sam (No Solution Yet, 34 Comments)
Difficulty: 3 of 5Root Route (in Algorithms) Rating: 2.20
Posted on 2004-06-29 by Gamer (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Class Pass (in Probability) Rating: 4.00
Posted on 2004-06-24 by Gamer (No Solution Yet, 15 Comments)
Difficulty: 2 of 5Maze Master (in Algorithms) Rating: 4.33
Posted on 2004-06-21 by Gamer (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Equilateral Triangle (in Geometry) Rating: 2.60
Posted on 2004-06-20 by SilverKnight (No Solution Yet, 22 Comments)
Difficulty: 4 of 5What's the difference between snowmen and snowwomen? (in Just Math) Rating: 4.00
Posted on 2004-06-14 by SilverKnight (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Mikhail's Sequence (in Sequences) Rating: 4.20
Posted on 2004-06-13 by Victor Zapana (No Solution Yet, 16 Comments)
Difficulty: 5 of 5Bird on a Wire (in Just Math) Rating: 3.70
Posted on 2004-06-07 by Sam (No Solution Yet, 42 Comments)
Difficulty: 2 of 5It's all in the roots! (in Just Math) Rating: 3.29
Posted on 2004-06-04 by Purna (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Fill 'Er Up! (in General) Rating: 4.40
Posted on 2004-06-03 by Victor Zapana (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Hexagonal Dilemma (in Geometry) Rating: 4.00
Posted on 2004-06-02 by SilverKnight (No Solution Yet, 18 Comments)
Difficulty: 2 of 5Linked Rings (in Geometry) Rating: 3.60
Posted on 2004-05-29 by SilverKnight (No Solution Yet, 19 Comments)
Difficulty: 4 of 5Answer Machine Hacking (in Algorithms) Rating: 4.43
Posted on 2004-05-24 by SilverKnight (No Solution Yet, 12 Comments)
Difficulty: 4 of 5The Conversing Club 4 (in General) Rating: 4.40
Posted on 2004-05-21 by Gamer (No Solution Yet, 7 Comments)
Difficulty: 5 of 5Perfect Shuffle (in General) Rating: 4.25
Posted on 2004-05-19 by SilverKnight (No Solution Yet, 20 Comments)
Difficulty: 2 of 5Will the real engineer please stand up? (in Logic) Rating: 3.22
Posted on 2004-05-18 by Victor Zapana (No Solution Yet, 47 Comments)
Difficulty: 5 of 5Ellipses (in Geometry) Rating: 3.83
Posted on 2004-05-17 by SilverKnight (No Solution Yet, 12 Comments)
Difficulty: 4 of 5The White Knight who couldn't quite remember II (in Logic) Rating: 4.14
Posted on 2004-05-12 by Sam (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Set problems (in Logic) Rating: 4.50
Posted on 2004-05-12 by Gamer (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Sum Rotation (in Numbers) Rating: 3.25
Posted on 2004-05-11 by Gamer (No Solution Yet, 17 Comments)
Difficulty: 4 of 5Would you like to play a game? (in General) Rating: 4.33
Posted on 2004-05-10 by SilverKnight (No Solution Yet, 13 Comments)
Difficulty: 3 of 5The grass is always greener... (in Paradoxes) Rating: 3.94
Posted on 2004-05-06 by Gamer (No Solution Yet, 46 Comments)
Difficulty: 2 of 5Particle Acceleration (in General) Rating: 2.33
Posted on 2004-05-06 by SilverKnight (No Solution Yet, 25 Comments)
Difficulty: 4 of 5Monkey Business (in Just Math) Rating: 3.50
Posted on 2004-04-30 by Gamer (No Solution Yet, 11 Comments)
Difficulty: 5 of 5The Fifteen Steps (in Games) Rating: 3.80
Posted on 2004-04-26 by Gamer (No Solution Yet, 16 Comments)
Difficulty: 3 of 510 Sequences (in Sequences) Rating: 3.56
Posted on 2004-04-23 by Victor Zapana (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Poisonous Dilemma (in Paradoxes) Rating: 3.85
Posted on 2004-04-19 by Victor Zapana (No Solution Yet, 84 Comments)
Difficulty: 3 of 5I Got Your Number (in Numbers) Rating: 3.60
Posted on 2004-04-18 by Bob Genisot (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Sneaky Joe's Craps (in Probability) Rating: 4.00
Posted on 2004-04-17 by Victor Zapana (No Solution Yet, 12 Comments)
Difficulty: 5 of 5Knight's Tour (3 & 4) (in Algorithms) Rating: 3.00
Posted on 2004-04-12 by SilverKnight (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Star Stack (in Shapes) Rating: 3.50
Posted on 2004-04-12 by Gamer (No Solution Yet, 19 Comments)
Difficulty: 5 of 5The Conversing Club 3 (in General) Rating: 4.57
Posted on 2004-03-28 by Gamer (No Solution Yet, 63 Comments)
Difficulty: 4 of 5Chords and Chords (in Geometry) Rating: 3.75
Posted on 2004-03-24 by SilverKnight (No Solution Yet, 23 Comments)
Difficulty: 3 of 5Squares Probability II (in Probability) Rating: 2.33
Posted on 2004-03-23 by Gamer (No Solution Yet, 15 Comments)
Difficulty: 4 of 5Toggler and Triggler (in Games) Rating: 3.86
Posted on 2004-03-12 by levik (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Knight's Tour (2) (in Games) Rating: 3.25
Posted on 2004-03-06 by SilverKnight (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Ten Colors (in General) Rating: 4.50
Posted on 2004-03-05 by Aaron (No Solution Yet, 6 Comments)
Difficulty: 5 of 5What is quicker than the eye? (in Science) Rating: 3.70
Posted on 2004-03-04 by SilverKnight (No Solution Yet, 15 Comments)
Difficulty: 4 of 5B-Palindromes (in Numbers) Rating: 4.00
Posted on 2004-02-25 by DJ (No Solution Yet, 11 Comments)
Difficulty: 1 of 5Suzy and the tricycle (in General) Rating: 2.83
Posted on 2004-02-24 by ratsnstuff (No Solution Yet, 13 Comments)
Difficulty: 3 of 5neves dda tsuj (in Numbers) Rating: 4.50
Posted on 2004-02-22 by DJ (No Solution Yet, 11 Comments)
Difficulty: 4 of 5West Side Story (in Numbers) Rating: 3.25
Posted on 2004-02-15 by DJ (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Triple Negative (in Logic) Rating: 4.13
Posted on 2004-02-12 by DJ (No Solution Yet, 19 Comments)
Difficulty: 2 of 5Diagonals Of A Polygon (in Just Math) Rating: 2.42
Posted on 2004-01-31 by Ravi Raja (No Solution Yet, 17 Comments)
Difficulty: 3 of 5Thirty two barbarians (in General) Rating: 3.00
Posted on 2004-01-28 by Gamer (No Solution Yet, 35 Comments)
Difficulty: 3 of 5Chessboard (in Probability) Rating: 3.50
Posted on 2004-01-14 by Ravi Raja (No Solution Yet, 20 Comments)
Difficulty: 4 of 5A smart prisoner? (in Probability) Rating: 4.00
Posted on 2004-01-08 by SilverKnight (No Solution Yet, 23 Comments)
Difficulty: 3 of 5I've Been Working... (in Geometry) Rating: 4.00
Posted on 2004-01-07 by DJ (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Equilateral Triangle (in Geometry) Rating: 4.00
Posted on 2003-12-18 by Ravi Raja (No Solution Yet, 21 Comments)
Difficulty: 3 of 5The Highest Grade (in Numbers) Rating: 3.40
Posted on 2003-12-11 by Gamer (No Solution Yet, 15 Comments)
Difficulty: 5 of 5I've a broken stick (in Probability) Rating: 3.60
Posted on 2003-12-07 by SilverKnight (No Solution Yet, 27 Comments)
Difficulty: 4 of 5Tricky Triangle (in Numbers) Rating: 3.25
Posted on 2003-12-03 by Kelsey (No Solution Yet, 15 Comments)
Difficulty: 2 of 5House Numbers (in Numbers) Rating: 3.00
Posted on 2003-12-02 by Ravi Raja (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Sides Of A Triangle (in Just Math) Rating: 4.11
Posted on 2003-11-23 by Ravi Raja (No Solution Yet, 15 Comments)
Difficulty: 3 of 5Bull's eye! (in Shapes) Rating: 3.60
Posted on 2003-11-22 by Antonio (No Solution Yet, 17 Comments)
Difficulty: 4 of 5Three of a Kind (in Probability) Rating: 4.40
Posted on 2003-11-19 by Lewis (No Solution Yet, 39 Comments)
Difficulty: 3 of 5Three numbers (in Just Math) Rating: 3.75
Posted on 2003-11-17 by Ravi Raja (No Solution Yet, 22 Comments)
Difficulty: 3 of 5Getting Sheepish (in Shapes) Rating: 4.18
Posted on 2003-11-12 by DJ (No Solution Yet, 10 Comments)
Difficulty: 4 of 5That's a Load of Craps! (in Probability) Rating: 4.46
Posted on 2003-10-22 by DJ (No Solution Yet, 13 Comments)
Difficulty: 4 of 5Four Tangent Circles (in Shapes) Rating: 4.25
Posted on 2003-10-20 by Bryan (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Square thinking (in Probability) Rating: 4.13
Posted on 2003-10-19 by Cory Taylor (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Strike a Chord (..Any Chord) (in Geometry) Rating: 4.53
Posted on 2003-10-09 by DJ (No Solution Yet, 51 Comments)
Difficulty: 3 of 5The Kind Grandparents (in Just Math) Rating: 3.78
Posted on 2003-09-30 by Lewis (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Got a Minute? (in Logic) Rating: 3.60
Posted on 2003-09-10 by Lewis (No Solution Yet, 37 Comments)
Difficulty: 4 of 5Leapfrog (in General) Rating: 4.33
Posted on 2003-06-24 by DJ (No Solution Yet, 18 Comments)
Difficulty: 3 of 5Make the least of these digits (in Numbers) Rating: 3.30
Posted on 2003-04-13 by Alan (No Solution Yet, 68 Comments)
Difficulty: 3 of 5Easy does it (in Numbers) Rating: 5.00
Posted on 2016-03-26 by Ady TZIDON (No Solution Yet, 3 Comments)
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