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Search results for problems posted by Jer :
Difficulty: 3 of 5Equilateral triangle by distances (in Shapes)
Posted on 2024-03-29 by Jer (No Solution Yet, 5 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 5A factorial pattern (in Numbers)
Posted on 2024-03-03 by Jer (No Solution Yet, 2 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 5Row of towers (in Shapes)
Posted on 2024-02-23 by Jer (No Solution Yet, 5 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 5Bug on a Cube 2 (in Probability)
Posted on 2023-11-27 by Jer (No Solution Yet, 5 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 5Sock Sorting Space (in Probability)
Posted on 2023-09-30 by Jer (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: 3 of 53 circles in a sliced square (in Geometry)
Posted on 2023-09-22 by Jer (No Solution Yet, 2 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: 3 of 5Circle's convergence (in Just Math)
Posted on 2023-07-31 by Jer (No Solution Yet, 3 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 5More solutions, please (in Just Math)
Posted on 2023-06-23 by Jer (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Pick two (in Probability)
Posted on 2023-06-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Friendly numbers (in Numbers)
Posted on 2023-06-02 by Jer (No Solution Yet, 5 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 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 5Rock smashing competition (in Probability)
Posted on 2023-05-08 by Jer (No Solution Yet, 7 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: 3 of 5Radical difference trigonometry (in Just Math)
Posted on 2023-04-16 by Jer (Solution Posted, 3 Comments)
Difficulty: 2 of 5Floored parabola (in Just Math)
Posted on 2023-04-03 by Jer (No Solution Yet, 4 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 5A troublesome number puzzle (in Numbers)
Posted on 2023-03-10 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Packing similar rectangles (in Shapes)
Posted on 2023-02-08 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Comb polyominos (in Shapes)
Posted on 2023-02-06 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Partially filled cone (in Geometry)
Posted on 2023-02-01 by Jer (No Solution Yet, 3 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: 1 of 5A 1/1 problem (in Numbers) Rating: 4.50
Posted on 2023-01-01 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5A Tangential Trapezoid (in Geometry)
Posted on 2022-11-30 by Jer (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 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: 4 of 5Scrabble numbers that score themselves (in Word Problems)
Posted on 2022-09-09 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 57 somewhere (in Numbers) Rating: 5.00
Posted on 2022-08-12 by Jer (No Solution Yet, 16 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: 4 of 5Pair of quadrilaterals (in Geometry)
Posted on 2022-07-21 by Jer (No Solution Yet, 4 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 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 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 5Eventual Inverse Function (in Just Math) Rating: 4.00
Posted on 2022-04-08 by Jer (No Solution Yet, 1 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: 2 of 5sum, reciprocals, squares (in Numbers) Rating: 4.00
Posted on 2022-03-22 by Jer (No Solution Yet, 4 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: 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: 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 5An Olympic trial (in Calculus) Rating: 4.00
Posted on 2022-03-01 by Jer (No Solution Yet, 1 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 5Announced vs Final rank average (in Probability) Rating: 5.00
Posted on 2022-02-23 by Jer (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: 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 5Triangle in a rectangle (in Geometry) Rating: 4.00
Posted on 2022-02-03 by Jer (No Solution Yet, 0 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 5Closest approaches (in Geometry) Rating: 3.00
Posted on 2022-01-14 by Jer (No Solution Yet, 3 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: 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 5Partially illuminated cylinder (in Calculus) Rating: 5.00
Posted on 2021-11-03 by Jer (Solution Posted, 9 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 5Quad-Ominoes (in Numbers) Rating: 4.00
Posted on 2021-10-20 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Actual triominoes (in Numbers) Rating: 4.00
Posted on 2021-10-13 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 55 equilaterals (in Geometry) Rating: 5.00
Posted on 2021-09-10 by Jer (No Solution Yet, 8 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: 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 5Planar factor graphs (in Just Math) Rating: 5.00
Posted on 2021-08-16 by Jer (No Solution Yet, 16 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: 2 of 5Pyramid from a square (in Shapes) Rating: 4.00
Posted on 2021-07-29 by Jer (Solution Posted, 3 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 5Unwinding a rope (in Calculus) Rating: 1.00
Posted on 2021-07-13 by Jer (No Solution Yet, 9 Comments)
Difficulty: 4 of 5Circle Line Locus (in Just Math) Rating: 4.00
Posted on 2021-07-02 by Jer (Solution Posted, 9 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 5Reverse and add in binary (in Numbers)
Posted on 2021-04-29 by Jer (No Solution Yet, 8 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: 4 of 5Never consecutive (in Probability) Rating: 4.00
Posted on 2021-01-26 by Jer (No Solution Yet, 7 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: 3 of 5Sin sum (in Just Math)
Posted on 2020-12-11 by Jer (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Gold-in pyramid (in Shapes) Rating: 5.00
Posted on 2020-10-06 by Jer (Solution Posted, 7 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 5Equilateral hexagon (in Geometry)
Posted on 2020-09-08 by Jer (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 5Yoshigahara's Masterpiece (in Logic) Rating: 2.00
Posted on 2020-07-31 by Jer (Solution Posted, 3 Comments)
Difficulty: 3 of 5Average other (in Numbers) Rating: 4.00
Posted on 2020-07-01 by Jer (No Solution Yet, 6 Comments)
Difficulty: 2 of 5The odd one out. (in Logic) Rating: 4.67
Posted on 2020-06-22 by Jer (Solution Posted, 7 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: 3 of 53 equilateral triangles in a rectangle (in Geometry)
Posted on 2020-02-28 by Jer (Solution Posted, 2 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 5Roll a unit (in Probability) Rating: 2.33
Posted on 2019-11-06 by Jer (Solution Posted, 3 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: 2 of 55 circles in a square part 1 (in Geometry)
Posted on 2019-08-28 by Jer (No Solution Yet, 6 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: 3 of 5What's the calculator doing? (in General)
Posted on 2019-03-06 by Jer (No Solution Yet, 4 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 5Two triangles in a square (in Geometry)
Posted on 2019-01-12 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cover half a square (in Geometry)
Posted on 2018-12-18 by Jer (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Colored triangle (in Sequences) Rating: 4.00
Posted on 2018-12-14 by Jer (No Solution Yet, 10 Comments)
Difficulty: 5 of 55 circles in a hexagon. (in Geometry)
Posted on 2018-11-25 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Monty Hall variant (in Probability)
Posted on 2018-09-30 by Jer (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 5A pet ant (in Shapes)
Posted on 2018-08-31 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Power tower (in Numbers)
Posted on 2018-08-26 by Jer (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: 2 of 5Winner moves (in Probability)
Posted on 2018-08-20 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Ant highway (in Shapes)
Posted on 2018-08-17 by Jer (No Solution Yet, 3 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: 4 of 5Play until you win (in Probability)
Posted on 2018-06-15 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5Cyclic Quadrilateral Tessellation (in Geometry)
Posted on 2018-06-09 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5The Truman Show (in Geometry)
Posted on 2018-03-02 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Double Secant (in Geometry)
Posted on 2018-02-15 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Incenter and a half (in Geometry)
Posted on 2018-02-03 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Quadrilateral fill in the blank (in Shapes)
Posted on 2018-01-25 by Jer (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 5Fair slices (in Geometry)
Posted on 2018-01-16 by Jer (No Solution Yet, 8 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 5Magic circle revisited (in Numbers) Rating: 3.00
Posted on 2017-12-22 by Jer (No Solution Yet, 5 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 5If two then three (in Just Math)
Posted on 2017-10-14 by Jer (No Solution Yet, 1 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 5Does it continue? 10: Alternate differences (in Numbers)
Posted on 2017-10-07 by Jer (No Solution Yet, 2 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 5Does it continue? 8: Prime together (in Numbers)
Posted on 2017-09-30 by Jer (No Solution Yet, 1 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 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: 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 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: 2 of 5Does it continue? 1: Chord regions (in Sequences)
Posted on 2017-09-13 by Jer (No Solution Yet, 9 Comments)
Difficulty: 2 of 5MMMMMM Donut (in Just Math)
Posted on 2017-09-11 by Jer (No Solution Yet, 4 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 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: 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: 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 5A unique Heronian triangle (in Geometry)
Posted on 2017-08-05 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Dec = xeh (in Numbers)
Posted on 2017-08-02 by Jer (No Solution Yet, 5 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: 2 of 5From Mahavira (in Just Math)
Posted on 2017-07-18 by Jer (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Pythagorean H/L ratios (in Just Math)
Posted on 2017-07-08 by Jer (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 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 5Odd Egyptians (in Numbers)
Posted on 2017-06-21 by Jer (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 5Delian delight (in Geometry)
Posted on 2017-06-04 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Many equal shapes (in Geometry)
Posted on 2017-04-30 by Jer (No Solution Yet, 0 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: 3 of 5A better approximate Pythagorean Theorem (in Calculus)
Posted on 2017-02-08 by Jer (No Solution Yet, 1 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 52nd grade math (in Probability)
Posted on 2017-01-12 by Jer (No Solution Yet, 4 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: 2 of 5Go back or double (in Sequences)
Posted on 2016-07-25 by Jer (No Solution Yet, 5 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 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 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: 1 of 5Simple number trick (in Numbers) Rating: 2.50
Posted on 2016-06-29 by Jer (Solution Posted, 5 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: 4 of 5Progressive probability (in Probability)
Posted on 2016-06-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Colored Candy Choice (in Probability)
Posted on 2016-05-25 by Jer (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Star-shaped polyominos (in Shapes)
Posted on 2016-03-28 by Jer (No Solution Yet, 7 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 5Ring of triangles I (in Geometry)
Posted on 2016-03-02 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Evaluate further probabilities (in Probability)
Posted on 2016-02-03 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Lost in the woods (in Just Math) Rating: 5.00
Posted on 2016-01-08 by Jer (Solution Posted, 12 Comments)
Difficulty: 2 of 5Two related sequences (in Sequences)
Posted on 2015-12-30 by Jer (No Solution Yet, 0 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 5Protecting the fleet Parts C. & D. (in Geometry)
Posted on 2015-12-15 by Jer (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: 3 of 5Fibonaccish ratio (in Sequences) Rating: 3.00
Posted on 2015-12-07 by Jer (No Solution Yet, 3 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 5An interesting matrix (in Sequences)
Posted on 2015-11-05 by Jer (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: 4 of 5Permutations count redux (in Numbers)
Posted on 2015-10-09 by Jer (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: 3 of 5Divide et impera part two (in Numbers)
Posted on 2015-08-26 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fibonacci appears again (in Sequences)
Posted on 2015-08-21 by Jer (Solution Posted, 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 5Best guess (in Probability)
Posted on 2015-07-30 by Jer (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Bean coloring (in Probability) Rating: 4.50
Posted on 2015-07-13 by Jer (No Solution Yet, 11 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: 2 of 5Map coloring (in Shapes) Rating: 3.33
Posted on 2015-06-05 by Jer (Solution Posted, 8 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: 3 of 5Sinusoidal System (in Just Math)
Posted on 2015-05-24 by Jer (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: 2 of 52^(10n) (in Numbers) Rating: 2.00
Posted on 2015-04-15 by Jer (Solution Posted, 9 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: 3 of 5Domain and Range (in Just Math)
Posted on 2015-04-02 by Jer (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 5Painting high dimension cubes (in Shapes)
Posted on 2015-03-05 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Double a triangle (in Sequences)
Posted on 2015-02-19 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Approximating radicals (in Numbers) Rating: 4.00
Posted on 2015-02-17 by Jer (No Solution Yet, 4 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: 3 of 5Match 3 Game (in General)
Posted on 2015-01-02 by Jer (No Solution Yet, 2 Comments)
Difficulty: 5 of 5Random^Random (in Probability) Rating: 5.00
Posted on 2014-10-29 by Jer (Solution Posted, 9 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 5Moving target (in Shapes)
Posted on 2014-09-25 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Adding to rolls (in Probability)
Posted on 2014-09-15 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 54 cents (in Shapes)
Posted on 2014-09-12 by Jer (No Solution Yet, 11 Comments)
Difficulty: 3 of 53 cents (in Shapes)
Posted on 2014-08-29 by Jer (No Solution Yet, 3 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: 3 of 5A tall tower (in Geometry)
Posted on 2014-06-18 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Arithmetic Grid II (in Just Math)
Posted on 2014-06-12 by Jer (No Solution Yet, 2 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 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 5Expected Smaller (in Probability)
Posted on 2014-05-12 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5More mean median mode (in Just Math)
Posted on 2014-02-21 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Mean = median (in Just Math)
Posted on 2014-02-20 by Jer (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Get a good look (in Calculus)
Posted on 2014-02-18 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Staircase tilings (in Shapes)
Posted on 2014-02-13 by Jer (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 5Numerators sum also (in Numbers)
Posted on 2014-01-13 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Polycubic surface (in Shapes)
Posted on 2013-10-29 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Warm/Cool Number Guessing (in Numbers)
Posted on 2013-09-30 by Jer (No Solution Yet, 6 Comments)
Difficulty: 1 of 52-D number guessing. (in Numbers)
Posted on 2013-09-23 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Divisibility of N (in Numbers)
Posted on 2013-06-15 by Jer (No Solution Yet, 4 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 5Pascal's e (in Calculus)
Posted on 2013-05-29 by Jer (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 5Computer's Delight (in Cryptography) Rating: 4.00
Posted on 2013-04-14 by Jer (No Solution Yet, 2 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: 3 of 5Powers often in other bases. (in Numbers)
Posted on 2013-04-07 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Sine gives pi? (in Just Math) Rating: 2.00
Posted on 2013-04-02 by Jer (Solution Posted, 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: 2 of 5Repeated part divisible by 9 (in Numbers)
Posted on 2013-03-22 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5All but one (in Numbers)
Posted on 2013-03-13 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5Touching polygons (in Shapes) Rating: 4.00
Posted on 2013-02-27 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5Commemorative triangles (in Sequences)
Posted on 2013-02-20 by Jer (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: 3 of 5Commemorations 2 (in Sequences)
Posted on 2013-02-11 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cans in a cooler (in Shapes)
Posted on 2013-02-11 by Jer (Solution Posted, 3 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: 3 of 5An age conversation (in Just Math)
Posted on 2013-01-22 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Exp=log (in Just Math)
Posted on 2012-12-12 by Jer (Solution Posted, 9 Comments)
Difficulty: 3 of 5My new sequence (in Sequences)
Posted on 2012-12-08 by Jer (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Transformed square (in Shapes)
Posted on 2012-10-25 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Transformed circle (in Shapes) Rating: 4.00
Posted on 2012-10-13 by Jer (No Solution Yet, 1 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 5Excited to win (in Probability)
Posted on 2012-06-06 by Jer (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: 5 of 5Spherical shelter 3 (in Calculus) Rating: 4.00
Posted on 2012-05-27 by Jer (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Repeated roll (in Probability)
Posted on 2012-05-25 by Jer (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 5Lean-to shelter (in Shapes)
Posted on 2012-05-03 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Spherical shelter (in Shapes)
Posted on 2012-04-27 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5I can see the origin from here. (in Calculus)
Posted on 2012-03-11 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5Competitive number guessing (in Probability)
Posted on 2012-02-11 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Boosted board (in General) Rating: 4.00
Posted on 2012-02-07 by Jer (Solution Posted, 11 Comments)
Difficulty: 3 of 5Isosceles from Regular (in Shapes) Rating: 5.00
Posted on 2012-01-20 by Jer (Solution Posted, 13 Comments)
Difficulty: 3 of 5Another folded paper (in Shapes)
Posted on 2012-01-03 by Jer (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Alternating Pascal (in Numbers)
Posted on 2011-12-08 by Jer (Solution Posted, 2 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: 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 5Angle of view - Parabola (in Geometry) Rating: 3.00
Posted on 2011-11-13 by Jer (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Slope products (in Geometry)
Posted on 2011-11-08 by Jer (Solution Posted, 3 Comments)
Difficulty: 2 of 5Slow growing sequence (in Sequences)
Posted on 2011-10-20 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Concerning combinatorics (in Numbers) Rating: 4.50
Posted on 2011-10-04 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Train track shapes (in Shapes)
Posted on 2011-08-01 by Jer (Solution Posted, 2 Comments)
Difficulty: 2 of 5Fortieth logs (in Just Math) Rating: 4.50
Posted on 2011-05-31 by Jer (Solution Posted, 15 Comments)
Difficulty: 2 of 5Sequence of wrong means (in Sequences)
Posted on 2011-05-26 by Jer (Solution Posted, 3 Comments)
Difficulty: 1 of 5Chime spacing. (in Just Math)
Posted on 2011-05-12 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 51 penny / 1 die (in Probability)
Posted on 2011-05-06 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5Unconsecutive-summables (in Numbers)
Posted on 2011-04-14 by Jer (Solution Posted, 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: 3 of 5Powerful Digit (in Probability) Rating: 4.00
Posted on 2011-03-29 by Jer (No Solution Yet, 12 Comments)
Difficulty: 4 of 5Domino Polygons (in Probability)
Posted on 2011-03-14 by Jer (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Integer points on ellipses (in Geometry)
Posted on 2011-03-10 by Jer (Solution Posted, 0 Comments)
Difficulty: 3 of 5Integer points on circles. (in Geometry) Rating: 3.50
Posted on 2011-02-28 by Jer (Solution Posted, 15 Comments)
Difficulty: 3 of 5Sevenths Sliced Square (in Geometry) Rating: 3.00
Posted on 2011-02-24 by Jer (Solution Posted, 7 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 5Flipping Even-Odd (in Probability)
Posted on 2011-01-28 by Jer (No Solution Yet, 3 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 5Around the ring (in Shapes) Rating: 3.00
Posted on 2010-12-20 by Jer (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Altered Parabolas (in Shapes)
Posted on 2010-12-01 by Jer (Solution Posted, 2 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 5Defined Function (in Just Math) Rating: 4.00
Posted on 2010-10-24 by Jer (No Solution Yet, 6 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 5Slowing by snowing (in Numbers)
Posted on 2010-09-13 by Jer (Solution Posted, 6 Comments)
Difficulty: 4 of 5Double coded message (in Cryptography) Rating: 3.50
Posted on 2010-04-21 by Jer (Solution Posted, 3 Comments)
Difficulty: 4 of 5Limiting Mean part 3 (in Calculus)
Posted on 2010-03-14 by Jer (No Solution Yet, 1 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: 3 of 5Squares joining quadratics (in Just Math) Rating: 4.00
Posted on 2010-02-24 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5Drop into the Bucket (in Shapes) Rating: 4.00
Posted on 2010-02-03 by Jer (Solution Posted, 9 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: 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: 3 of 5Cubic Surface (in Shapes)
Posted on 2009-12-07 by Jer (No Solution Yet, 3 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: 3 of 5No Monochrome Arithmetic Sequence (in Numbers) Rating: 4.00
Posted on 2009-10-19 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5No Monochrome Sums (in Numbers)
Posted on 2009-10-14 by Jer (Solution Posted, 10 Comments)
Difficulty: 4 of 59 points to convex pentagon (in Shapes)
Posted on 2009-10-12 by Jer (No Solution Yet, 4 Comments)
Difficulty: 2 of 58 points no convex pentagon (in Shapes)
Posted on 2009-10-09 by Jer (Solution Posted, 4 Comments)
Difficulty: 2 of 55 points to convex quad (in Shapes) Rating: 4.00
Posted on 2009-10-05 by Jer (Solution Posted, 4 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 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: 1 of 5Consecutive Semiprimes (in Numbers)
Posted on 2009-09-04 by Jer (Solution Posted, 3 Comments)
Difficulty: 3 of 5Random + Random + Random (in Probability) Rating: 3.00
Posted on 2009-08-28 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5Random +, - or / Random (in Probability)
Posted on 2009-08-24 by Jer (Solution Posted, 2 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: 3 of 5Conic Spiral (in Geometry)
Posted on 2009-08-06 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5and W (in Word Problems) Rating: 3.00
Posted on 2009-07-14 by Jer (Solution Posted, 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 5Partridge Pandigital Set (in Numbers) Rating: 4.00
Posted on 2009-07-05 by Jer (Solution Posted, 4 Comments)
Difficulty: 3 of 53x3 Nim (in Games) Rating: 4.00
Posted on 2009-06-25 by Jer (Solution Posted, 26 Comments)
Difficulty: 3 of 5Bounded Sine (in Shapes)
Posted on 2009-06-23 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two way tube. (in Shapes) Rating: 1.50
Posted on 2009-06-15 by Jer (Solution Posted, 3 Comments)
Difficulty: 4 of 5Lights switched (in Logic)
Posted on 2009-06-03 by Jer (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Random chord problem (in Geometry) Rating: 3.00
Posted on 2009-05-11 by Jer (Solution Posted, 17 Comments)
Difficulty: 3 of 5Bouncy Bouncy Part 3 (in Geometry)
Posted on 2009-05-04 by Jer (No Solution Yet, 1 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 5Derivative chains. (in Calculus)
Posted on 2009-03-29 by Jer (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Skyscraper Counting (in Numbers)
Posted on 2009-03-16 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Rationalizing Decimals (in Numbers) Rating: 3.00
Posted on 2007-09-26 by Jer (Solution Posted, 8 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: 4 of 5Numbered Cards (in Probability) Rating: 4.00
Posted on 2007-07-23 by Jer (Solution Posted, 13 Comments)
Difficulty: 2 of 5sin(15)=sin(15) (in General) Rating: 3.33
Posted on 2007-06-25 by Jer (Solution Posted, 2 Comments)
Difficulty: 2 of 5# Wrong = % Right (in General) Rating: 3.50
Posted on 2007-06-16 by Jer (Solution Posted, 6 Comments)
Difficulty: 3 of 5Blue Moon (in Probability) Rating: 3.00
Posted on 2007-06-07 by Jer (Solution Posted, 2 Comments)
Difficulty: 4 of 5Queue weight possibilities 2. (in Numbers) Rating: 3.00
Posted on 2007-05-23 by Jer (Solution Posted, 3 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 5Queue weight possibilities. (in Numbers)
Posted on 2007-05-15 by Jer (Solution Posted, 3 Comments)
Difficulty: 3 of 5Phidius (in Numbers) Rating: 2.67
Posted on 2007-05-11 by Jer (Solution Posted, 4 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: 2 of 5Well Balanced Letter: E (in Shapes) Rating: 4.33
Posted on 2007-04-30 by Jer (No Solution Yet, 5 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: 2 of 5Pair formed Sequence (in Sequences) Rating: 4.00
Posted on 2007-02-09 by Jer (Solution Posted, 6 Comments)
Difficulty: 3 of 5Guess Again (in Probability) Rating: 3.33
Posted on 2007-01-15 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5Fifteen Jumbled (in Sequences) Rating: 3.00
Posted on 2006-12-29 by Jer (Solution Posted, 7 Comments)
Difficulty: 3 of 5Colored Bead Combos (in Probability) Rating: 3.00
Posted on 2006-12-17 by Jer (Solution Posted, 3 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 5Rack-O (in Probability) Rating: 4.67
Posted on 2006-10-10 by Jer (Solution Posted, 4 Comments)
Difficulty: 3 of 5Repeating decimals (in Numbers) Rating: 4.50
Posted on 2006-09-25 by Jer (Solution Posted, 12 Comments)
Difficulty: 4 of 5compoundwordplay (in Word Problems)
Posted on 2006-09-20 by Jer (Solution Posted, 5 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: 3 of 5So how small is it then? (in Numbers) Rating: 4.00
Posted on 2006-08-09 by Jer (Solution Posted, 17 Comments)
Difficulty: 1 of 5Due on the 15th (in General) Rating: 3.00
Posted on 2006-08-02 by Jer (Solution Posted, 7 Comments)
Difficulty: 4 of 5Various Valleys, More Mountains (in Shapes) Rating: 2.50
Posted on 2006-07-26 by Jer (Solution Posted, 8 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: 2 of 5Mountains and Valleys (in Shapes) Rating: 2.50
Posted on 2006-07-19 by Jer (No Solution Yet, 9 Comments)
Difficulty: 4 of 510 Ultimate cribbage hands (in Games) Rating: 3.33
Posted on 2006-07-18 by Jer (Solution Posted, 6 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: 4 of 5Gardener's Woe (in Just Math) Rating: 4.00
Posted on 2006-06-24 by Jer (Solution Posted, 27 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 5Trig meets Logs (in Numbers) Rating: 3.00
Posted on 2006-06-14 by Jer (No Solution Yet, 2 Comments)
Difficulty: 3 of 5log the log (in Just Math) Rating: 3.50
Posted on 2006-06-11 by Jer (Solution Posted, 5 Comments)
Difficulty: 2 of 51 Palindrome 1 (in Just Math) Rating: 3.67
Posted on 2006-06-10 by Jer (Solution Posted, 9 Comments)
Difficulty: 3 of 5A dilution problem (in Just Math) Rating: 3.33
Posted on 2006-06-08 by Jer (Solution Posted, 6 Comments)
Difficulty: 4 of 5The Ultimate Cribbage Hand (in Games) Rating: 3.33
Posted on 2006-06-07 by Jer (Solution Posted, 21 Comments)
Difficulty: 2 of 5Who? (in Cryptography) Rating: 3.00
Posted on 2006-06-04 by Jer (Solution Posted, 7 Comments)
Difficulty: 2 of 5Math Rebuses (Rebi?) (in Word Problems) Rating: 3.00
Posted on 2006-06-01 by Jer (Solution Posted, 9 Comments)
Difficulty: 2 of 5Coin through a hole (in Shapes) Rating: 3.00
Posted on 2006-05-29 by Jer (Solution Posted, 24 Comments)
Difficulty: 5 of 5Domino arrangements (in General) Rating: 3.67
Posted on 2006-05-27 by Jer (Solution Posted, 8 Comments)
Difficulty: 3 of 5Domino fractions (in Numbers) Rating: 3.00
Posted on 2006-05-25 by Jer (Solution Posted, 2 Comments)
Difficulty: 3 of 5Unfilled grid (in General) Rating: 4.14
Posted on 2006-05-23 by Jer (Solution Posted, 7 Comments)
Difficulty: 3 of 5Circumferential distances (in General) Rating: 3.50
Posted on 2006-05-21 by Jer (Solution Posted, 3 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: 2 of 5ABCDEABCDE is one (in General) Rating: 4.50
Posted on 2006-05-17 by Jer (Solution Posted, 4 Comments)
Difficulty: 3 of 5Square dissection (in Shapes) Rating: 3.67
Posted on 2006-05-16 by Jer (Solution Posted, 4 Comments)
Difficulty: 2 of 5Cubes in a tin (in Shapes) Rating: 2.67
Posted on 2006-05-15 by Jer (Solution Posted, 24 Comments)
Difficulty: 3 of 5Garden Path (in Geometry) Rating: 3.67
Posted on 2006-05-10 by Jer (Solution Posted, 12 Comments)
Difficulty: 3 of 5Squares in a cross (in General) Rating: 4.00
Posted on 2006-05-10 by Jer (Solution Posted, 6 Comments)
Difficulty: 4 of 5Tidy Triangle (in Shapes)
Posted on 2006-05-05 by Jer (Solution Posted, 7 Comments)
Difficulty: 1 of 5Square = half itself? (in Shapes) Rating: 3.00
Posted on 2006-05-04 by Jer (Solution Posted, 19 Comments)
Difficulty: 3 of 5A Maypole Problem (in Geometry) Rating: 3.33
Posted on 2006-05-01 by Jer (Solution Posted, 8 Comments)
Difficulty: 2 of 5100 squares (in Shapes) Rating: 4.00
Posted on 2006-04-30 by Jer (Solution Posted, 7 Comments)
Difficulty: 2 of 5Assigning a wonky die (in Probability) Rating: 3.00
Posted on 2006-04-28 by Jer (Solution Posted, 4 Comments)
Difficulty: 4 of 53 in a row = bad (in General) Rating: 4.50
Posted on 2006-04-26 by Jer (Solution Posted, 13 Comments)
Difficulty: 3 of 5Figuring a wonky die (in Probability) Rating: 3.00
Posted on 2006-04-24 by Jer (Solution Posted, 6 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: 3 of 5Walking the Edge (in Shapes)
Posted on 2006-04-18 by Jer (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Remainders (in Numbers) Rating: 4.00
Posted on 2006-04-15 by Jer (Solution Posted, 4 Comments)
Difficulty: 2 of 5That's a lotta numbers! (in Numbers) Rating: 3.25
Posted on 2006-04-14 by Jer (Solution Posted, 10 Comments)
Difficulty: 2 of 5RIP (in General) Rating: 2.00
Posted on 2006-04-13 by Jer (Solution Posted, 6 Comments)
Difficulty: 3 of 53's & 7's (in Numbers) Rating: 3.25
Posted on 2006-04-09 by Jer (Solution Posted, 13 Comments)
Difficulty: 3 of 5Two fours (or fewer?) (in Numbers) Rating: 4.00
Posted on 2006-04-07 by Jer (Solution Posted, 16 Comments)
Difficulty: 2 of 5Sum and Product reversal (in Numbers) Rating: 3.50
Posted on 2006-04-05 by Jer (Solution Posted, 6 Comments)
Difficulty: 2 of 5Don't drink and run (in Tricks) Rating: 3.67
Posted on 2006-04-03 by Jer (Solution Posted, 6 Comments)
Difficulty: 3 of 5Lack of transport (in General) Rating: 3.75
Posted on 2006-03-31 by Jer (Solution Posted, 7 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: 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 53 age problems (in Just Math) Rating: 3.67
Posted on 2006-03-24 by Jer (Solution Posted, 8 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 5Rotating slopes (in Just Math) Rating: 3.20
Posted on 2006-03-21 by Jer (Solution Posted, 5 Comments)
Difficulty: 3 of 5Pythagorean Chain (in Shapes) Rating: 3.50
Posted on 2006-03-20 by Jer (Solution Posted, 19 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 5Bouncy Bouncy part 2 (in Calculus) Rating: 4.50
Posted on 2006-02-10 by Jer (Solution Posted, 15 Comments)
Difficulty: 2 of 5Bouncy Bouncy Part 1 (in Geometry) Rating: 4.00
Posted on 2006-02-08 by Jer (Solution Posted, 11 Comments)
Difficulty: 4 of 5A cute little angle to find (in Geometry) Rating: 3.67
Posted on 2006-01-18 by Jer (Solution Posted, 7 Comments)
Difficulty: 4 of 5D on its side (in Shapes) Rating: 4.33
Posted on 2006-01-16 by Jer (Solution Posted, 14 Comments)
Difficulty: 3 of 5Stupid number trick IV (in Numbers) Rating: 4.00
Posted on 2006-01-13 by Jer (Solution Posted, 23 Comments)
Difficulty: 3 of 5Stupid number trick III (in Numbers) Rating: 4.00
Posted on 2006-01-11 by Jer (Solution Posted, 11 Comments)
Difficulty: 2 of 5Stupid number trick II (in Numbers) Rating: 3.67
Posted on 2006-01-02 by Jer (Solution Posted, 6 Comments)
Difficulty: 1 of 5Stupid number trick (in Numbers) Rating: 2.33
Posted on 2005-12-01 by Jer (Solution Posted, 9 Comments)
Difficulty: 3 of 5Not shaken, not stirred, but stable. (in Calculus) Rating: 2.00
Posted on 2005-09-10 by Jer (Solution Posted, 6 Comments)
Difficulty: 3 of 5A quadrilateral query (in Geometry) Rating: 3.00
Posted on 2005-08-29 by Jer (Solution Posted, 6 Comments)
Difficulty: 2 of 5The folly of war part 1: Knights (in Probability) Rating: 3.40
Posted on 2005-08-23 by Jer (Solution Posted, 24 Comments)
Difficulty: 2 of 5Digit Sequence (in Sequences) Rating: 3.63
Posted on 2005-06-28 by Jer (Solution Posted, 16 Comments)
Difficulty: 2 of 5Are we odd for liking this? (in Cryptography) Rating: 4.30
Posted on 2005-06-09 by Jer (Solution Posted, 12 Comments)
Difficulty: 2 of 5Discriminants (in Numbers) Rating: 3.50
Posted on 2005-05-24 by Jer (Solution Posted, 7 Comments)
Difficulty: 2 of 5Silly System (in Numbers) Rating: 2.75
Posted on 2005-05-16 by Jer (Solution Posted, 6 Comments)
Difficulty: 2 of 5Radically confusing (in Numbers) Rating: 1.43
Posted on 2005-05-14 by Jer (Solution Posted, 16 Comments)
Difficulty: 2 of 5Create the equation (in Numbers) Rating: 2.43
Posted on 2005-05-09 by Jer (Solution Posted, 10 Comments)
Difficulty: 2 of 5Inscribed Triangle (in Geometry) Rating: 3.00
Posted on 2005-05-07 by Jer (Solution Posted, 4 Comments)
Difficulty: 4 of 5Make it solvable (in Numbers) Rating: 3.67
Posted on 2005-05-05 by Jer (Solution Posted, 18 Comments)
Difficulty: 3 of 5String length differences (in General) Rating: 4.00
Posted on 2005-02-15 by Jer (Solution Posted, 5 Comments)
Difficulty: 2 of 5Reverse and Differ (in Numbers) Rating: 3.00
Posted on 2005-02-01 by Jer (Solution Posted, 7 Comments)
Difficulty: 2 of 5A Curious Cone (in Geometry) Rating: 2.25
Posted on 2004-10-11 by Jer (Solution Posted, 12 Comments)
Difficulty: 2 of 5Third Squared (in Shapes) Rating: 4.25
Posted on 2004-09-15 by Jer (Solution Posted, 7 Comments)
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