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Search results for problems posted by Ady TZIDON :
Difficulty: 3 of 5Word word (in General)
Posted on 2020-06-05 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Eight of them (in Numbers)
Posted on 2020-06-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Deja vu (in Sequences) Rating: 5.00
Posted on 2020-05-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5A six-digit answer (in Just Math)
Posted on 2020-05-20 by Ady TZIDON (No Solution Yet, 1 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, 1 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: 3 of 5Luck beats theory (in Probability)
Posted on 2020-05-04 by Ady TZIDON (No Solution Yet, 3 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, 8 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, 2 Comments)
Difficulty: 2 of 5PYHIYP #6 (in Logic) Rating: 3.50
Posted on 2020-04-17 by Ady TZIDON (No Solution Yet, 4 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 5Define my profile (in General)
Posted on 2020-04-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Go away ! (in Numbers)
Posted on 2020-03-30 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5What time is it now? (in General)
Posted on 2020-03-09 by Ady TZIDON (Solution Posted, 4 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)
Posted on 2020-02-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Thrifty dates (in Numbers)
Posted on 2020-02-22 by Ady TZIDON (Solution Posted, 2 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: 2 of 5PYHIYP #4 (in Logic)
Posted on 2020-02-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5PYHIYP #3: 8 given, 1 missing (in Logic) Rating: 2.00
Posted on 2020-02-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Insert A B & C (in Word Problems)
Posted on 2020-01-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Certain old trade (in General)
Posted on 2020-01-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5PYHIYP #2 (in Just Math) Rating: 5.00
Posted on 2020-01-13 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Phrase and misconception (in Cryptography) Rating: 2.00
Posted on 2020-01-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 513 L2L (in Word Problems)
Posted on 2019-12-25 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Poetry, not poverty (in Just Math)
Posted on 2019-12-18 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5PYHIYP #1 (in Numbers) Rating: 5.00
Posted on 2019-12-09 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Nobody's Perfect (in Just Math)
Posted on 2019-12-04 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5 78991 84! (in Word Problems) Rating: 3.00
Posted on 2019-11-19 by Ady TZIDON (Solution Posted, 2 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 5Two methods (in Word Problems)
Posted on 2019-10-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Recover a number (in Just Math)
Posted on 2019-10-29 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Ardent tennis player (in Just Math)
Posted on 2019-10-22 by Ady TZIDON (No Solution Yet, 1 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: 3 of 5One in all (in Word Problems)
Posted on 2019-10-09 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5An important virtue (in Word Problems)
Posted on 2019-10-07 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 58 eights, 8 ones (in Just Math)
Posted on 2019-10-01 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 55 given, 4 missing (in Numbers)
Posted on 2019-09-26 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Jeopardy style IV (in Word Problems)
Posted on 2019-09-10 by Ady TZIDON (No Solution Yet, 2 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 5Memphis, Tennessee (in Word Problems) Rating: 5.00
Posted on 2019-09-02 by Ady TZIDON (No Solution Yet, 2 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, 1 Comments)
Difficulty: 4 of 5Getting 8 (in Numbers)
Posted on 2019-08-11 by Ady TZIDON (Solution Posted, 12 Comments)
Difficulty: 3 of 5Unique letters (in Word Problems)
Posted on 2019-08-08 by Ady TZIDON (Solution Posted, 1 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 5Listing the cardinal numbers’ names (in Word Problems)
Posted on 2019-07-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Pairs of primes (in Probability)
Posted on 2019-07-27 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 4 of 515 A2A (in Word Problems)
Posted on 2019-07-26 by Ady TZIDON (Solution Posted, 3 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, 2 Comments)
Difficulty: 3 of 5One puzzle, three hints (in General)
Posted on 2019-07-13 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Trying to get better (in Just Math)
Posted on 2019-07-11 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5249-yes, 5-no (in Numbers)
Posted on 2019-07-08 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5A special triplet (in Numbers)
Posted on 2019-07-02 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Cryptajoke XIX (in Word Problems)
Posted on 2019-06-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Primes and Semiprimes (in Numbers)
Posted on 2019-06-12 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Catching flak thrice (in Word Problems)
Posted on 2019-06-10 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Who's on the 4th base? (in Numbers)
Posted on 2019-05-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Divisors' sum = square (in Numbers) Rating: 3.00
Posted on 2019-05-27 by Ady TZIDON (Solution Posted, 7 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 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, 1 Comments)
Difficulty: 3 of 5Prime wisdom (in Logic)
Posted on 2019-05-14 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Solver's choices (in Numbers)
Posted on 2019-05-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Precision counts! (in Sequences) Rating: 5.00
Posted on 2019-05-12 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Based upon a secret (in Sequences)
Posted on 2019-04-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5A Jewish dilemma (in Word Problems)
Posted on 2019-04-19 by Ady TZIDON (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: 2 of 5Just count them ! (in Just Math)
Posted on 2019-04-09 by Ady TZIDON (Solution Posted, 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: 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, 4 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 5Odd one out (in Word Problems) Rating: 4.00
Posted on 2019-02-28 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5L & R (in Word Problems)
Posted on 2019-02-26 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Add no DANDY - No need ! (in Word Problems)
Posted on 2019-02-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Palindromes' divisibility (in Numbers)
Posted on 2019-02-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Biggest palindrome (in Numbers)
Posted on 2019-02-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Twin and reversible (in Numbers)
Posted on 2019-02-20 by Ady TZIDON (Solution Posted, 4 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: 2 of 55 given, 3 to find (in Sequences)
Posted on 2019-02-15 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Davay! (in Sequences)
Posted on 2019-02-14 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Recovering the number (in Numbers)
Posted on 2019-02-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Insert 2 missing numbers (in Sequences)
Posted on 2019-02-11 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Get a stonefish! (in Numbers)
Posted on 2019-02-09 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5She missed an operator (in Numbers)
Posted on 2019-02-06 by Ady TZIDON (Solution Posted, 1 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 5Neighbors differ by even numbers (in Numbers)
Posted on 2019-02-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Only prime digits allowed (in Numbers)
Posted on 2019-01-31 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Consistency parameter (in Just Math)
Posted on 2019-01-30 by Ady TZIDON (No Solution Yet, 3 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: 4 of 5Art Image (in General) Rating: 4.00
Posted on 2019-01-25 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Uniform distribution (in Probability)
Posted on 2019-01-25 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5More or less 6 days (in Just Math)
Posted on 2019-01-24 by Ady TZIDON (Solution Posted, 6 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: 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: 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 5From unrelated words to family (in Word Problems) Rating: 5.00
Posted on 2019-01-17 by Ady TZIDON (No Solution Yet, 1 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 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 5Small difference (in Word Problems)
Posted on 2019-01-09 by Ady TZIDON (No Solution Yet, 1 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: 3 of 54 or more primes (in Numbers)
Posted on 2019-01-03 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Contradiction by erasure (in Word Problems) Rating: 4.00
Posted on 2019-01-02 by Ady TZIDON (Solution Posted, 1 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 5Double perfection (in Numbers)
Posted on 2018-12-28 by Ady TZIDON (Solution Posted, 1 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: 3 of 5Same digits (in Numbers) Rating: 4.00
Posted on 2018-12-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Choosing a game (in Just Math)
Posted on 2018-12-25 by Ady TZIDON (Solution Posted, 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: 4 of 5Restoring a definition (in Word Problems)
Posted on 2018-12-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Always zero or four (in Numbers)
Posted on 2018-12-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5All digits distinct (in Numbers)
Posted on 2018-12-12 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5A short list (in Numbers)
Posted on 2018-12-11 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5Maximal number of solutions (in Just Math)
Posted on 2018-12-08 by Ady TZIDON (Solution Posted, 5 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 5Logic or madness? (in Logic)
Posted on 2018-12-04 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 1 of 5A number plus its reversal (in Numbers)
Posted on 2018-12-03 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 4 of 5Evaluate the sum (in Sequences)
Posted on 2018-12-01 by Ady TZIDON (Solution Posted, 5 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, 1 Comments)
Difficulty: 2 of 5Rooks on a chessboard (in Numbers)
Posted on 2018-11-26 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5From sum to addends (in Just Math)
Posted on 2018-11-22 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 53 equal products (in Numbers)
Posted on 2018-11-21 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 1 of 5A non-algebra problem (in Numbers)
Posted on 2018-11-19 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5New word from two others (in Word Problems) Rating: 4.00
Posted on 2018-11-18 by Ady TZIDON (Solution Posted, 9 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: 2 of 5The penultimate digit (in Just Math)
Posted on 2018-11-12 by Ady TZIDON (No Solution Yet, 2 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: 2 of 5Not a common text (in Word Problems)
Posted on 2018-11-07 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 1 of 5Sum of the page numbers (in Just Math)
Posted on 2018-11-05 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A couple of numbers (in Numbers)
Posted on 2018-11-04 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Duelling pairs (in Games)
Posted on 2018-11-02 by Ady TZIDON (No Solution Yet, 7 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: 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: 3 of 5A number well defined (in Numbers)
Posted on 2018-10-25 by Ady TZIDON (No Solution Yet, 5 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: 4 of 5Squares needing 2 digits only (in Numbers)
Posted on 2018-10-21 by Ady TZIDON (Solution Posted, 3 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 5Get the bases! (in Just Math)
Posted on 2018-10-17 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Box of balls (in Probability) Rating: 4.00
Posted on 2018-10-16 by Ady TZIDON (Solution Posted, 6 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 5Jeopardy! style II (in Just Math)
Posted on 2018-10-09 by Ady TZIDON (Solution Posted, 3 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 5At least 3 zeroes (in Sequences)
Posted on 2018-10-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Equal values (in Numbers)
Posted on 2018-10-01 by Ady TZIDON (Solution Posted, 4 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: 2 of 5A logical search (in Numbers) Rating: 1.50
Posted on 2018-09-24 by Ady TZIDON (Solution Posted, 10 Comments)
Difficulty: 3 of 5Jeopardy style (in Just Math)
Posted on 2018-09-23 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5A square divides concatenation (in Numbers)
Posted on 2018-09-22 by Ady TZIDON (Solution Posted, 1 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 5Odd, but true (in Word Problems)
Posted on 2018-09-20 by Ady TZIDON (Solution Posted, 4 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)
Posted on 2018-09-12 by Ady TZIDON (No Solution Yet, 2 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: 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)
Posted on 2018-09-03 by Ady TZIDON (No Solution Yet, 6 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 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, 4 Comments)
Difficulty: 1 of 5Mission Impossible (in Just Math)
Posted on 2018-08-28 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5A set of numbers (in Numbers)
Posted on 2018-08-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A counting task (in Numbers)
Posted on 2018-08-23 by Ady TZIDON (Solution Posted, 7 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: 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: 3 of 5In Memoriam (in Numbers) Rating: 5.00
Posted on 2018-08-16 by Ady TZIDON (No Solution Yet, 8 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 5Jeopardy-style A&Q (in Numbers) Rating: 5.00
Posted on 2018-08-12 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Quintuplet of consecutive primes (in Numbers)
Posted on 2018-08-11 by Ady TZIDON (Solution Posted, 3 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 5Art is marching on.. (in Word Problems) Rating: 1.00
Posted on 2018-08-08 by Ady TZIDON (Solution Posted, 5 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, 1 Comments)
Difficulty: 3 of 5Goldbach's double (in Just Math)
Posted on 2018-08-04 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 4 of 5Call 911 (in Just Math)
Posted on 2018-08-03 by Ady TZIDON (Solution Posted, 2 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 5Special feature (in Numbers)
Posted on 2018-07-29 by Ady TZIDON (Solution Posted, 6 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 5Pairing sizes (in General)
Posted on 2018-07-25 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Happy New Year (in Numbers)
Posted on 2018-07-23 by Ady TZIDON (Solution Posted, 1 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, 0 Comments)
Difficulty: 3 of 5Truncatable primes (in Numbers)
Posted on 2018-07-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5From eleven to ... ETERNITY (in Numbers)
Posted on 2018-07-14 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Counting sudokus (in Numbers)
Posted on 2018-07-13 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Aloof prime (in Numbers)
Posted on 2018-07-12 by Ady TZIDON (Solution Posted, 2 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 5Sum of 4 squares (in Numbers)
Posted on 2018-07-08 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 55 ways of factorizing (in Numbers) Rating: 3.00
Posted on 2018-07-07 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Magic square of cubes (in Numbers)
Posted on 2018-07-05 by Ady TZIDON (No Solution Yet, 0 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: 2 of 5Counting magic squares (in Just Math) Rating: 2.00
Posted on 2018-06-30 by Ady TZIDON (Solution Posted, 2 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 5Cubes as factorials' sum (in Numbers)
Posted on 2018-06-23 by Ady TZIDON (Solution Posted, 1 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, 3 Comments)
Difficulty: 4 of 5Space guys (in Just Math)
Posted on 2018-06-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Counting ones (in Just Math)
Posted on 2018-06-18 by Ady TZIDON (No Solution Yet, 2 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 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)
Posted on 2018-06-04 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 3 of 5Equidistant point (in Geometry) Rating: 2.00
Posted on 2018-06-03 by Ady TZIDON (No Solution Yet, 4 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: 3 of 5Using its own digits (in Numbers)
Posted on 2018-05-31 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 3 of 5Thinking octal (in Numbers)
Posted on 2018-05-30 by Ady TZIDON (Solution Posted, 2 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 5Ascending order (in Numbers)
Posted on 2018-05-26 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5How many drinks do you need? (in Numbers)
Posted on 2018-05-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5495 and 6174 (in Numbers)
Posted on 2018-05-24 by Ady TZIDON (Solution Posted, 3 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 5High and low (in Word Problems)
Posted on 2018-05-21 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5SI O NO ? (in General) Rating: 3.00
Posted on 2018-05-19 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Will take some time ?? (in Numbers)
Posted on 2018-05-18 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5Just 3 digits (in Sequences)
Posted on 2018-05-17 by Ady TZIDON (Solution Posted, 4 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 5A reason to complain (in Numbers)
Posted on 2018-05-12 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 52 capitals (in Word Problems)
Posted on 2018-05-11 by Ady TZIDON (Solution Posted, 3 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 5Strongly related (in Just Math)
Posted on 2018-05-05 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5190 couples (in Numbers) Rating: 3.00
Posted on 2018-05-03 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5It is not 42 (in Numbers)
Posted on 2018-04-29 by Ady TZIDON (No Solution Yet, 1 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: 2 of 5Pandigital set II (in Numbers)
Posted on 2018-04-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Partitura (in Numbers)
Posted on 2018-04-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A primer in Malaga (in Numbers)
Posted on 2018-04-19 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Debugging a system (in Just Math)
Posted on 2018-04-16 by Ady TZIDON (Solution Posted, 5 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: 3 of 5On the road again (in Numbers)
Posted on 2018-04-10 by Ady TZIDON (Solution Posted, 5 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: 2 of 5A short list (in Numbers)
Posted on 2018-04-07 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Squares built from leftovers (in Numbers)
Posted on 2018-04-05 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Create a magic square (in Numbers)
Posted on 2018-04-03 by Ady TZIDON (Solution Posted, 2 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 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: 3 of 5Colored beads (in Just Math)
Posted on 2018-03-21 by Ady TZIDON (No Solution Yet, 2 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: 4 of 5Seven given - the eighth TBD (in Sequences)
Posted on 2018-03-14 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 1 of 5A scrambled acronym (in Word Problems)
Posted on 2018-03-13 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Q: ?hat letter is missing? (in Numbers)
Posted on 2018-03-11 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5An atom of atom (in Numbers)
Posted on 2018-03-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Another Dudeney problem (in Numbers)
Posted on 2018-03-09 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Summing the factors (in Numbers)
Posted on 2018-03-08 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Radius missing (in Geometry)
Posted on 2018-03-07 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Past and present (in Logic)
Posted on 2018-03-05 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A palindromic equation (in Numbers)
Posted on 2018-03-04 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Hill's data (in Numbers) Rating: 5.00
Posted on 2018-03-03 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 515=5*3 (in Sequences)
Posted on 2018-03-01 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Trailing zeros (in Numbers)
Posted on 2018-02-28 by Ady TZIDON (Solution Posted, 1 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 5Sum of subfactorials (in Numbers)
Posted on 2018-02-25 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Completing a triplet (in Numbers)
Posted on 2018-02-24 by Ady TZIDON (Solution Posted, 5 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 5A quote and its source (in Word Problems)
Posted on 2018-02-21 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5A state of a State (in General)
Posted on 2018-02-19 by Ady TZIDON (Solution Posted, 8 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 5Let's make a deal (in Numbers) Rating: 5.00
Posted on 2018-02-17 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 515 letters (in Word Problems)
Posted on 2018-02-16 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 3 of 5Four fours (in Numbers)
Posted on 2018-02-14 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Choosing the right number (in Numbers)
Posted on 2018-02-13 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5Pick-a-book meeting (in Just Math)
Posted on 2018-02-12 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Using nine positive digits (in Numbers)
Posted on 2018-02-11 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Only six distinct digits (in Numbers)
Posted on 2018-02-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5En francais seulement ! (in Numbers)
Posted on 2018-02-09 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Square pairs (in Just Math) Rating: 5.00
Posted on 2018-02-07 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Not all a's are in (in Numbers)
Posted on 2018-02-06 by Ady TZIDON (Solution Posted, 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 5A couple of squares (in Numbers)
Posted on 2018-02-02 by Ady TZIDON (Solution Posted, 9 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 5113 together (in Just Math) Rating: 1.00
Posted on 2018-01-30 by Ady TZIDON (Solution Posted, 4 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: 4 of 5Champagnat numbers (in Just Math)
Posted on 2018-01-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Try a shortcut (in Just Math) Rating: 3.00
Posted on 2018-01-21 by Ady TZIDON (Solution Posted, 1 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: 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: 2 of 5Funny way to divide by seven (in Numbers)
Posted on 2018-01-12 by Ady TZIDON (Solution Posted, 3 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 5A meeting point (in Just Math)
Posted on 2018-01-07 by Ady TZIDON (Solution Posted, 2 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, 1 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: 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 5Persistence I (in Numbers)
Posted on 2017-12-24 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Do not say ONE (in Games)
Posted on 2017-12-23 by Ady TZIDON (Solution Posted, 3 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: 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: 5 of 5Any two out of five (in Numbers)
Posted on 2017-12-16 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Squares in a rectangle (in Numbers)
Posted on 2017-12-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Fibo's zeroes repeated (in Numbers)
Posted on 2017-12-14 by Ady TZIDON (No Solution Yet, 1 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, 2 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)
Posted on 2017-12-04 by Ady TZIDON (No Solution Yet, 1 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: 4 of 5Peace, no war (in General)
Posted on 2017-11-30 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5A square pairing (in Numbers)
Posted on 2017-11-29 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Quickie XI (in Numbers)
Posted on 2017-11-27 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A special pandigital (in Numbers)
Posted on 2017-11-26 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5Unique decimal primes (in Algorithms)
Posted on 2017-11-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Test #11 (in Numbers)
Posted on 2017-11-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Way to go (in Riddles) Rating: 4.00
Posted on 2017-11-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5A pandigital sum (in Numbers)
Posted on 2017-11-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A triple T question (in Famous Riddles)
Posted on 2017-11-20 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5What is .... ...... (in Numbers)
Posted on 2017-11-19 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Ulam numbers II (in Numbers)
Posted on 2017-11-18 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Pythagorean areas (in Numbers)
Posted on 2017-11-17 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 3 of 5Your creativity challenged (in Riddles)
Posted on 2017-11-15 by Ady TZIDON (No Solution Yet, 6 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, 1 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)
Posted on 2017-11-09 by Ady TZIDON (No Solution Yet, 2 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)
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, 2 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 5Mutual dependence (in Numbers) Rating: 3.00
Posted on 2017-11-01 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 52 ways to prove it (in Just Math)
Posted on 2017-10-31 by Ady TZIDON (No Solution Yet, 2 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: 2 of 5It is not SIX (in Numbers)
Posted on 2017-10-26 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Obtuse angle? (in Probability)
Posted on 2017-10-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5One word - created by two others (in Word Problems)
Posted on 2017-10-25 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Solution's forecast (in Just Math)
Posted on 2017-10-24 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 53 multiples of cubes (in Numbers)
Posted on 2017-10-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Urban architecture (in Word Problems)
Posted on 2017-10-23 by Ady TZIDON (No Solution Yet, 1 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, 5 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 5The Odds Must Be Crazy (in Probability)
Posted on 2017-10-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5The olog is t anagrammed (in Word Problems)
Posted on 2017-10-19 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5√22 (in Numbers)
Posted on 2017-10-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5SUM = PR0DUCT (in Numbers)
Posted on 2017-10-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Alfey revava ... (in General)
Posted on 2017-10-17 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 59 cubes (in Numbers)
Posted on 2017-10-17 by Ady TZIDON (Solution Posted, 1 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: 2 of 5Dimsums LTD (in Numbers)
Posted on 2017-10-16 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Two-three integers (in Numbers)
Posted on 2017-10-15 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5What's out? (in Word Problems)
Posted on 2017-10-13 by Ady TZIDON (Solution Posted, 3 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: 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, 4 Comments)
Difficulty: 3 of 5In Europe (in General)
Posted on 2017-10-04 by Ady TZIDON (No Solution Yet, 6 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: 4 of 5A scrambled BEDLAM (in Just Math)
Posted on 2017-09-29 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Toasting the eternal (in Just Math)
Posted on 2017-09-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Solve the alpha2etic ! (in Just Math)
Posted on 2017-09-23 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 53 by 3 by 5 (in Word Problems)
Posted on 2017-09-22 by Ady TZIDON (Solution Posted, 6 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: 4 of 5Reverse Engineering (in General)
Posted on 2017-09-15 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Cryptaquote I (in Word Problems) Rating: 5.00
Posted on 2017-09-14 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Sans squares (in Sequences)
Posted on 2017-09-12 by Ady TZIDON (No Solution Yet, 1 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: 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: 2 of 5The rain in Spain (in Just Math)
Posted on 2017-09-05 by Ady TZIDON (No Solution Yet, 3 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 5Leaving a maximal result (in Algorithms)
Posted on 2017-08-25 by Ady TZIDON (No Solution Yet, 1 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: 3 of 5A repunit product (in Word Problems)
Posted on 2017-08-19 by Ady TZIDON (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: 1 of 5The well-defined digit (in Numbers) Rating: 5.00
Posted on 2017-08-14 by Ady TZIDON (No Solution Yet, 5 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 5A text sans (in Word Problems)
Posted on 2017-08-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Published in the thirties (in Famous Riddles) Rating: 3.00
Posted on 2017-08-03 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Think big (in Numbers)
Posted on 2017-08-03 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Two parallelograms (in Geometry) Rating: 3.00
Posted on 2017-08-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find this word (in Word Problems)
Posted on 2017-07-31 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 4 of 5Add'em all ! (in Numbers)
Posted on 2017-07-27 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5Not too many (in Just Math)
Posted on 2017-07-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Almost-pandigital sets (in Numbers)
Posted on 2017-07-22 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 52 bases (in Numbers)
Posted on 2017-07-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Q & A (in General)
Posted on 2017-07-20 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 53 and 4-digit numbers (in Numbers)
Posted on 2017-07-17 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Guess who (in Sequences)
Posted on 2017-07-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Brazilian numbers (in Sequences) Rating: 3.00
Posted on 2017-07-15 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 1 of 5Fermat numbers (in Numbers) Rating: 4.00
Posted on 2017-07-13 by Ady TZIDON (No Solution Yet, 2 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 5Just add 2 letters (in Word Problems)
Posted on 2017-07-06 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 54 couples make a new word (in Word Problems)
Posted on 2017-07-04 by Ady TZIDON (Solution Posted, 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 5Words and hints (in General)
Posted on 2017-06-27 by Ady TZIDON (Solution Posted, 1 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 52017 to start with (in Numbers)
Posted on 2017-06-23 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Letters to digits to letters (in Numbers)
Posted on 2017-06-22 by Ady TZIDON (Solution Posted, 1 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, 1 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)
Posted on 2017-06-11 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Add another line (in General)
Posted on 2017-06-10 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5A powerful anagram (in Word Problems)
Posted on 2017-06-09 by Ady TZIDON (Solution Posted, 2 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: 3 of 5Question and answer (in General) Rating: 5.00
Posted on 2017-06-07 by Ady TZIDON (Solution Posted, 3 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 5Ulam numbers (in Numbers) Rating: 3.00
Posted on 2017-06-03 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5His last words (in Word Problems)
Posted on 2017-06-02 by Ady TZIDON (Solution Posted, 2 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: 3 of 5 Empty the bucket (in Logic) Rating: 4.50
Posted on 2017-05-29 by Ady TZIDON (Solution Posted, 12 Comments)
Difficulty: 1 of 5Erase one (in Numbers)
Posted on 2017-05-28 by Ady TZIDON (Solution Posted, 1 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: 4 of 5First or second? (in Games) Rating: 3.00
Posted on 2017-05-23 by Ady TZIDON (Solution Posted, 6 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: 2 of 5Four balls (in Probability) Rating: 3.50
Posted on 2017-05-19 by Ady TZIDON (Solution Posted, 22 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, 4 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 5One more line (in Logic)
Posted on 2017-05-10 by Ady TZIDON (Solution Posted, 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, 5 Comments)
Difficulty: 1 of 5Heavily wounded (in Probability) Rating: 3.00
Posted on 2017-05-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No software allowed ! (in Numbers)
Posted on 2017-05-07 by Ady TZIDON (No Solution Yet, 6 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 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, 1 Comments)
Difficulty: 2 of 5Prime with no prime digits (in Numbers)
Posted on 2017-04-25 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Liars can figure (in Liars and Knights) Rating: 2.00
Posted on 2017-04-24 by Ady TZIDON (Solution Posted, 4 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: 3 of 5Cryptajoke XVII (in Numbers) Rating: 3.00
Posted on 2017-04-21 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5The Dot-town Suicides (in Logic)
Posted on 2017-04-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5A factorial in seconds (in Numbers) Rating: 5.00
Posted on 2017-04-18 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Pacifist or else? (in Word Problems)
Posted on 2017-04-16 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Pandigital and square (in Numbers)
Posted on 2017-04-15 by Ady TZIDON (No Solution Yet, 6 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: 3 of 5Le petit trivia (in Numbers)
Posted on 2017-04-12 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5Pretty primes (in Numbers)
Posted on 2017-04-10 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Names in Boxes (in Logic) Rating: 3.75
Posted on 2017-04-09 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Excellent numbers (in Numbers)
Posted on 2017-04-08 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5The magnificent twelve (in Numbers)
Posted on 2017-04-07 by Ady TZIDON (Solution Posted, 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 5Y ask about Y ? (in Numbers) Rating: 3.00
Posted on 2017-04-04 by Ady TZIDON (Solution Posted, 5 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: 3 of 5Inspirational aspiration (in Word Problems)
Posted on 2017-03-31 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Over 18 (in Sequences)
Posted on 2017-03-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5 QUICKIE X (in Just Math)
Posted on 2017-03-28 by Ady TZIDON (Solution Posted, 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: 3 of 5Power partition procedure (in Numbers)
Posted on 2017-03-26 by Ady TZIDON (Solution Posted, 5 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, 4 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: 2 of 5Leave no stone unturned (in Logic) Rating: 4.00
Posted on 2017-03-19 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5A rare palindrome (in Numbers)
Posted on 2017-03-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Primes and factors (in Numbers)
Posted on 2017-03-17 by Ady TZIDON (Solution Posted, 2 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 5It's obvious, but needs proof (in Just Math)
Posted on 2017-03-15 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Equality? Yes, but not exactly... (in Numbers)
Posted on 2017-03-14 by Ady TZIDON (Solution Posted, 1 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: 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 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 5An easy whodunit (in Logic) Rating: 3.33
Posted on 2017-03-08 by Ady TZIDON (Solution Posted, 8 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 5Only real x counted (in Probability)
Posted on 2017-03-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5a KISS puzzle (in Just Math)
Posted on 2017-02-27 by Ady TZIDON (Solution Posted, 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 5Italian, English, and both (in General)
Posted on 2017-02-22 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Integer triplets (in Just Math)
Posted on 2017-02-21 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5The toll of two cities (in Geometry)
Posted on 2017-02-20 by Ady TZIDON (Solution Posted, 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: 3.00
Posted on 2017-02-14 by Ady TZIDON (No Solution Yet, 8 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: 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 54 is five and 5 is four (in Word Problems)
Posted on 2017-02-04 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5T better than S (in Famous Riddles)
Posted on 2017-02-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Given VI, evaluate VII (in Sequences)
Posted on 2017-02-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5The kiss (in Word Problems)
Posted on 2017-01-30 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Opening your eyes (in Famous Riddles)
Posted on 2017-01-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5A false conjecture (in Numbers)
Posted on 2017-01-27 by Ady TZIDON (Solution Posted, 7 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, 3 Comments)
Difficulty: 3 of 5Six (or more) sextuples (in Numbers)
Posted on 2017-01-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5777-111 (in General)
Posted on 2017-01-19 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5When is it a square? (in Just Math)
Posted on 2017-01-15 by Ady TZIDON (Solution Posted, 1 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 5Squares sum up to a prime (in Just Math)
Posted on 2017-01-13 by Ady TZIDON (Solution Posted, 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 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: 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: 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 5Prime candidates (in Just Math)
Posted on 2016-12-20 by Ady TZIDON (Solution Posted, 5 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: 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: 3 of 5Four integers (in Numbers)
Posted on 2016-12-04 by Ady TZIDON (No Solution Yet, 8 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: 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, 5 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 5At least twice (in Numbers)
Posted on 2016-11-17 by Ady TZIDON (Solution Posted, 5 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: 3 of 5In terzo luogo (in Sequences)
Posted on 2016-11-13 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5 6 given, 2 wanted (in Sequences)
Posted on 2016-11-11 by Ady TZIDON (Solution Posted, 5 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 5A peculiar triplet (in Just Math)
Posted on 2016-11-01 by Ady TZIDON (Solution Posted, 7 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 5Symmetry helps! (in Just Math)
Posted on 2016-10-26 by Ady TZIDON (Solution Posted, 7 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 5List of triplets (in Just Math)
Posted on 2016-10-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Why not marry? (in Logic)
Posted on 2016-10-19 by Ady TZIDON (Solution Posted, 6 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 5Phibobrick's dimensions (in Numbers)
Posted on 2016-10-14 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Adding consecutive primes (in Just Math)
Posted on 2016-10-11 by Ady TZIDON (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: 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: 2 of 5Cryptajoke XV (in Cryptography)
Posted on 2016-09-26 by Ady TZIDON (No Solution Yet, 1 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: 3 of 5Area search (in Geometry)
Posted on 2016-09-19 by Ady TZIDON (Solution Posted, 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: 4 of 5Anamonics (in Word Problems)
Posted on 2016-09-16 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The triple threat (in Tricks)
Posted on 2016-09-13 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 54 rebuses (in Word Problems)
Posted on 2016-09-12 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Think twice (in Just Math) Rating: 5.00
Posted on 2016-09-12 by Ady TZIDON (Solution Posted, 4 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 5Counting ARATs (in Numbers)
Posted on 2016-09-07 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 51248 must be included (in Sequences)
Posted on 2016-09-06 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5Getting 189 (in Numbers)
Posted on 2016-09-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Bonne chance (in Logic) Rating: 4.00
Posted on 2016-09-02 by Ady TZIDON (Solution Posted, 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: 2 of 5Moving a rook (in Games)
Posted on 2016-08-29 by Ady TZIDON (Solution Posted, 1 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: 2 of 5Business is business (in Word Problems) Rating: 4.00
Posted on 2016-08-24 by Ady TZIDON (No Solution Yet, 6 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: 4 of 5Bananas travel (in General)
Posted on 2016-08-19 by Ady TZIDON (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: 3 of 5Summing up (in Sequences)
Posted on 2016-08-17 by Ady TZIDON (Solution Posted, 2 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 5240 divisors (in Just Math)
Posted on 2016-08-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Translate a ledger entry (in Word Problems) Rating: 4.00
Posted on 2016-08-12 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Find additional pairs (in Just Math)
Posted on 2016-08-08 by Ady TZIDON (Solution Posted, 5 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: 1 of 5Square angles (in Shapes)
Posted on 2016-08-02 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Ending by 3 or 7 (in Numbers)
Posted on 2016-08-01 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5Mirror multiplication (in Numbers)
Posted on 2016-07-31 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Hat #11 (in Logic) Rating: 4.00
Posted on 2016-07-27 by Ady TZIDON (Solution Posted, 3 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 5Cute numbers (in Numbers)
Posted on 2016-07-21 by Ady TZIDON (No Solution Yet, 5 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: 2 of 5Two items to get sqrt of 2 (in Science) Rating: 3.00
Posted on 2016-07-19 by Ady TZIDON (Solution Posted, 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 5Divisible by 19? (in Numbers)
Posted on 2016-07-15 by Ady TZIDON (No Solution Yet, 1 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: 4 of 5Two out of seven (in Numbers)
Posted on 2016-07-07 by Ady TZIDON (Solution Posted, 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 5Who said it? (in Cryptography)
Posted on 2016-07-04 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Three vowels (in Word Problems)
Posted on 2016-06-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Find the killer (in Liars and Knights) Rating: 5.00
Posted on 2016-06-20 by Ady TZIDON (Solution Posted, 5 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 5A transpogram (in Word Problems)
Posted on 2016-06-16 by Ady TZIDON (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: 2 of 5Cryptajoke XIII (in Cryptography)
Posted on 2016-06-13 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5Squared halves (in Numbers)
Posted on 2016-06-10 by Ady TZIDON (No Solution Yet, 1 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 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 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: 4 of 5Finding the fixes (in Numbers)
Posted on 2016-05-29 by Ady TZIDON (No Solution Yet, 4 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 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: 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)
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: 3 of 5Rocking moves (in Logic) Rating: 5.00
Posted on 2016-05-17 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A square problem (in Just Math)
Posted on 2016-05-17 by Ady TZIDON (No Solution Yet, 1 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: 2 of 5Easy Victory (in Numbers)
Posted on 2016-05-13 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5From challenge to change (in Word Problems) Rating: 5.00
Posted on 2016-05-12 by Ady TZIDON (Solution Posted, 4 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 5Make it true (in Numbers)
Posted on 2016-05-09 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Cryptajoke XIV (in Cryptography)
Posted on 2016-05-06 by Ady TZIDON (Solution Posted, 2 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, 1 Comments)
Difficulty: 1 of 5Create this string (in Numbers)
Posted on 2016-05-04 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5You'll be surprised (in Numbers)
Posted on 2016-05-03 by Ady TZIDON (No Solution Yet, 5 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 5Much of few is many (in Numbers)
Posted on 2016-04-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5One and only (in Numbers)
Posted on 2016-04-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5M.G.'s wit (in Just Math)
Posted on 2016-04-27 by Ady TZIDON (Solution Posted, 3 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: 3 of 5The heavy couple (in Weights and Scales)
Posted on 2016-04-22 by Ady TZIDON (Solution Posted, 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: 1 of 5Never on Sunday (in Liars and Knights)
Posted on 2016-04-21 by Ady TZIDON (Solution Posted, 1 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, 7 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: 4 of 5A Pythagorean triangle (in Numbers) Rating: 5.00
Posted on 2016-04-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Worth trying (in Numbers)
Posted on 2016-04-06 by Ady TZIDON (Solution Posted, 1 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 5What's our problem? (in Numbers)
Posted on 2016-03-30 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 51+4=5 (in Just Math)
Posted on 2016-03-28 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5A scrabblematic problem (in General)
Posted on 2016-03-25 by Ady TZIDON (Solution Posted, 13 Comments)
Difficulty: 3 of 5Minimizing n (in Numbers)
Posted on 2016-03-23 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Neighbors or not? (in Probability)
Posted on 2016-03-22 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Not so trivial (in Numbers)
Posted on 2016-03-18 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 52 coins (in Probability)
Posted on 2016-03-18 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Never 0 mod 3 (in Probability)
Posted on 2016-03-17 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Minimal cardinality (in Numbers)
Posted on 2016-03-16 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Same area (in Shapes) Rating: 4.00
Posted on 2016-03-15 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 1 of 5Percentage quickie (in Numbers) Rating: 3.00
Posted on 2016-03-14 by Ady TZIDON (Solution Posted, 1 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 5Only one below 5000 (in Numbers)
Posted on 2016-03-11 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Love is blind (in Numbers)
Posted on 2016-03-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5d1 or more ? (in Numbers)
Posted on 2016-03-07 by Ady TZIDON (Solution Posted, 4 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: 2 of 513 and 2 (in Numbers) Rating: 1.00
Posted on 2016-03-01 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Find the sum (in Just Math)
Posted on 2016-02-29 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Within the Galaxy (in Just Math) Rating: 3.00
Posted on 2016-02-28 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5What's this (in Word Problems)
Posted on 2016-02-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5My four numbers (in Just Math) Rating: 4.33
Posted on 2016-02-24 by Ady TZIDON (Solution Posted, 12 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 5The hundreds' digit (in Just Math)
Posted on 2016-02-22 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Fifty-fifty? (in Probability)
Posted on 2016-02-18 by Ady TZIDON (Solution Posted, 2 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: 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: 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: 3.00
Posted on 2016-02-04 by Ady TZIDON (No Solution Yet, 3 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 5Dascal triangle (in Numbers)
Posted on 2016-02-02 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Maybe soon (in Numbers)
Posted on 2016-02-01 by Ady TZIDON (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, 1 Comments)
Difficulty: 3 of 5Find the next two numbers (in Sequences)
Posted on 2016-01-21 by Ady TZIDON (Solution Posted, 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: 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 5Family tree (in Logic) Rating: 5.00
Posted on 2016-01-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 570 6570 (in General) Rating: 4.00
Posted on 2016-01-14 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 56 coins (in Weights and Scales) Rating: 4.25
Posted on 2016-01-13 by Ady TZIDON (Solution Posted, 10 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: 2 of 5Four balloons (in Just Math)
Posted on 2016-01-12 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5A math symbol (in Numbers) Rating: 2.00
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 5Test #10 (in General)
Posted on 2016-01-07 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Test #9 (in Word Problems)
Posted on 2016-01-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Twenty deposits (in Just Math) Rating: 3.00
Posted on 2016-01-04 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Peaceful superqueens (in General)
Posted on 2015-12-31 by Ady TZIDON (No Solution Yet, 2 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)
Posted on 2015-12-27 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Ten cities (in Cryptography) Rating: 4.00
Posted on 2015-12-24 by Ady TZIDON (Solution Posted, 1 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: 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 5Some sequences! (in Sequences)
Posted on 2015-12-18 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5The three words (in Word Problems)
Posted on 2015-12-17 by Ady TZIDON (Solution Posted, 1 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: 4 of 59-letter word III (in Just Math) Rating: 3.50
Posted on 2015-12-11 by Ady TZIDON (Solution Posted, 8 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 5A special short-list (in Numbers)
Posted on 2015-12-08 by Ady TZIDON (Solution Posted, 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: 2 of 5List of pairs (in Just Math)
Posted on 2015-12-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Variety of divisors (in Numbers)
Posted on 2015-12-03 by Ady TZIDON (No Solution Yet, 3 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: 3.00
Posted on 2015-12-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Increasing sequences (in Just Math)
Posted on 2015-11-30 by Ady TZIDON (Solution Posted, 3 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 5Wise Russell (in Tricks) Rating: 5.00
Posted on 2015-11-24 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Biggest and smallest (in Just Math)
Posted on 2015-11-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5AINS (in Word Problems)
Posted on 2015-11-23 by Ady TZIDON (Solution Posted, 3 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 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: 3 of 5Italiano vero (in Just Math) Rating: 3.00
Posted on 2015-11-16 by Ady TZIDON (Solution Posted, 3 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: 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: 1 of 56 or less liars (in Liars and Knights) Rating: 2.00
Posted on 2015-11-13 by Ady TZIDON (Solution Posted, 16 Comments)
Difficulty: 3 of 53c+2v (in Word Problems)
Posted on 2015-11-12 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Two sisters (in Famous Riddles)
Posted on 2015-11-12 by Ady TZIDON (Solution Posted, 2 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 5Wise saw (in General)
Posted on 2015-11-10 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Tiling and counting (in Numbers)
Posted on 2015-11-10 by Ady TZIDON (Solution Posted, 2 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, 2 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: 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 5Seven numbers for seven words (in Cryptography) Rating: 4.00
Posted on 2015-11-02 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Prediction (in Tricks)
Posted on 2015-11-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Incredible, but solvable (in Just Math)
Posted on 2015-10-30 by Ady TZIDON (No Solution Yet, 11 Comments)
Difficulty: 2 of 5A plural of a plural (in Word Problems) Rating: 5.00
Posted on 2015-10-30 by Ady TZIDON (Solution Posted, 5 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, 1 Comments)
Difficulty: 2 of 5A canonical representation (in Just Math)
Posted on 2015-10-27 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Magic matrix (in Just Math)
Posted on 2015-10-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Tacit series (in Sequences)
Posted on 2015-10-23 by Ady TZIDON (Solution Posted, 2 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: 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 5Factorials & factorions (in Numbers) Rating: 5.00
Posted on 2015-10-19 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Will you find it? (in Cryptography)
Posted on 2015-10-19 by Ady TZIDON (Solution Posted, 2 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: 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: 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 5Cryptajoke X (in Just Math)
Posted on 2015-10-06 by Ady TZIDON (Solution Posted, 0 Comments)
Difficulty: 3 of 5Probability of constant leading (in Probability)
Posted on 2015-10-05 by Ady TZIDON (Solution Posted, 5 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 5All are... (in Word Problems) Rating: 1.00
Posted on 2015-10-02 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Permutations count (in Numbers) Rating: 3.00
Posted on 2015-10-01 by Ady TZIDON (Solution Posted, 10 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: 1 of 5Cryptajoke IX (in Cryptography)
Posted on 2015-09-28 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 5 of 59-letter word (in Numbers)
Posted on 2015-09-25 by Ady TZIDON (Solution Posted, 6 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, 8 Comments)
Difficulty: 3 of 5Cheryl's b-day (in Logic)
Posted on 2015-09-24 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Three brothers (in Just Math) Rating: 3.00
Posted on 2015-09-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Hexakosioihexekontahexaphobia (in General)
Posted on 2015-09-22 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5a KISS question (in Probability)
Posted on 2015-09-21 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 52 easy cryptajokes (VIII) (in Cryptography)
Posted on 2015-09-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Some definite results (in Numbers)
Posted on 2015-09-17 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Check divisibility (in Numbers)
Posted on 2015-09-16 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5 The golden ratio (in Just Math) Rating: 4.00
Posted on 2015-09-16 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 4 of 5Three clever monsters (in Numbers)
Posted on 2015-09-15 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Coordinating arrival (in Just Math)
Posted on 2015-09-15 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5C reverses into F (in Numbers) Rating: 1.00
Posted on 2015-09-14 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Alphamagic square (in Numbers)
Posted on 2015-09-11 by Ady TZIDON (Solution Posted, 0 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: 3 of 5One-liners (in General)
Posted on 2015-09-09 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Believe it or not (in Word Problems) Rating: 3.00
Posted on 2015-09-08 by Ady TZIDON (Solution Posted, 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 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 5Muchos idiomas (in Word Problems)
Posted on 2015-09-01 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Cryptajoke VII (in Word Problems)
Posted on 2015-08-31 by Ady TZIDON (Solution Posted, 2 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, 1 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: 2 of 5Explain it (in Word Problems) Rating: 3.00
Posted on 2015-08-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5British wit (in General)
Posted on 2015-08-24 by Ady TZIDON (Solution Posted, 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 5Three coins (in Probability) Rating: 2.00
Posted on 2015-08-20 by Ady TZIDON (Solution Posted, 10 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 5This or that? (in Probability) Rating: 4.00
Posted on 2015-08-19 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Divide et impera (in Numbers)
Posted on 2015-08-18 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Ez & true (in Riddles)
Posted on 2015-08-17 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Eight efficient blacksmiths (in Just Math) Rating: 4.00
Posted on 2015-08-13 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Wisecracks (in Word Problems)
Posted on 2015-08-12 by Ady TZIDON (No Solution Yet, 0 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 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: 3 of 5A ruler (in Word Problems)
Posted on 2015-08-05 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Consonants galore (in Word Problems)
Posted on 2015-08-04 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Around chicken (in Word Problems)
Posted on 2015-08-03 by Ady TZIDON (Solution Posted, 1 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 5You make me laugh (in Numbers)
Posted on 2015-07-28 by Ady TZIDON (Solution Posted, 2 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 5No letters (in Cryptography) Rating: 4.00
Posted on 2015-07-27 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Matching pairs (in Numbers) Rating: 5.00
Posted on 2015-07-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5What's in a name? (in Word Problems)
Posted on 2015-07-23 by Ady TZIDON (Solution Posted, 3 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 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 5Picking numbers (in Probability)
Posted on 2015-07-17 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 3 of 5Pasta wrestling (in Word Problems)
Posted on 2015-07-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5What is perplexus? (in Numbers)
Posted on 2015-07-16 by Ady TZIDON (Solution Posted, 3 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: 2 of 5Something is "some night" (in Word Problems)
Posted on 2015-07-13 by Ady TZIDON (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: 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, 5 Comments)
Difficulty: 3 of 5Past persons (in Word Problems)
Posted on 2015-07-06 by Ady TZIDON (Solution Posted, 3 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: 2 of 5The enigmatic one (in Sequences)
Posted on 2015-06-30 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5Just give it a trial (in General) Rating: 3.00
Posted on 2015-06-26 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5Factorial creates prime (in Numbers)
Posted on 2015-06-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5It is not 8^5 (in Numbers) Rating: 5.00
Posted on 2015-06-24 by Ady TZIDON (Solution Posted, 3 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: 4 of 57 idiomatic phrases (in Word Problems)
Posted on 2015-06-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5One triplet out (in Numbers)
Posted on 2015-06-16 by Ady TZIDON (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 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: 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 55 76993 408621 (in Numbers) Rating: 5.00
Posted on 2015-06-04 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 51270 *899 (in General)
Posted on 2015-06-02 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5All that glitters (in Numbers)
Posted on 2015-05-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Just vowels (in General)
Posted on 2015-05-29 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 1 of 5What property? (in Shapes)
Posted on 2015-05-28 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Chacun pense à soi (in Just Math)
Posted on 2015-05-26 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Tax Collector (in Games)
Posted on 2015-05-26 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5No neighbors allowed (in Numbers)
Posted on 2015-05-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5One, two, eight etc (in Numbers)
Posted on 2015-05-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Back to throne (in Probability)
Posted on 2015-05-21 by Ady TZIDON (Solution Posted, 3 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: 1 of 5A sequence or not a sequence? (in Logic)
Posted on 2015-05-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Euler on trial (in Numbers)
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: 2 of 5How far can you go? (in Numbers)
Posted on 2015-05-12 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 1 of 5A Quickie, not tricky (in Numbers)
Posted on 2015-05-11 by Ady TZIDON (No Solution Yet, 6 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: 4 of 5Rhyme time (in Word Problems) Rating: 5.00
Posted on 2015-05-07 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 54 primes (in Numbers)
Posted on 2015-05-06 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Printer's glitch (in Just Math)
Posted on 2015-05-05 by Ady TZIDON (No Solution Yet, 4 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: 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 5Words with tripled letters (in Word Problems)
Posted on 2015-04-30 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Cryptajoke V (in Cryptography) Rating: 3.00
Posted on 2015-04-30 by Ady TZIDON (Solution Posted, 2 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 5From E to D (in Logic)
Posted on 2015-04-28 by Ady TZIDON (Solution Posted, 4 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, 1 Comments)
Difficulty: 3 of 5Not solvable by computer (?) (in Word Problems)
Posted on 2015-04-24 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Three's a company (in General)
Posted on 2015-04-23 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 2 of 5XX=? (in General)
Posted on 2015-04-22 by Ady TZIDON (No Solution Yet, 2 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 5Some powers decomposed (in Numbers)
Posted on 2015-04-16 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Name the location (in Word Problems)
Posted on 2015-04-16 by Ady TZIDON (Solution Posted, 1 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 5Long chain (in Numbers)
Posted on 2015-04-10 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 4 of 5From product to town (in Word Problems)
Posted on 2015-04-10 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Some sums (in Numbers)
Posted on 2015-04-07 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Roman palindrome (in Numbers)
Posted on 2015-04-07 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Long-life recipe (in Logic)
Posted on 2015-04-06 by Ady TZIDON (Solution Posted, 1 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: 4 of 5General advice (in Cryptography) Rating: 5.00
Posted on 2015-04-03 by Ady TZIDON (Solution Posted, 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: 2 of 527-8=19 (in Just Math)
Posted on 2015-03-31 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5How many solutions? (in Just Math)
Posted on 2015-03-30 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Oxymora galore (in Word Problems) Rating: 5.00
Posted on 2015-03-27 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Animal to animal (in Word Problems)
Posted on 2015-03-27 by Ady TZIDON (Solution Posted, 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: 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: 4 of 5A walking contradiction (in Word Problems)
Posted on 2015-03-20 by Ady TZIDON (Solution Posted, 1 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: 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: 4 of 53 sets of primes (in Numbers)
Posted on 2015-03-08 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 5Cryptajoke IV (in Logic)
Posted on 2015-03-06 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Find the last member (in Sequences)
Posted on 2015-03-05 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Contradict Goldbach (in Numbers) Rating: 1.00
Posted on 2015-03-03 by Ady TZIDON (No Solution Yet, 2 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: 4 of 5Back to the Bard (in Cryptography)
Posted on 2015-02-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Academia, defeated, yesterday (in Word Problems)
Posted on 2015-02-26 by Ady TZIDON (Solution Posted, 6 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: 1 of 5Cryptajoke III (in Logic) Rating: 4.00
Posted on 2015-02-23 by Ady TZIDON (Solution Posted, 3 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 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: 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 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: 2 of 5Is it easy? (in Cryptography)
Posted on 2015-02-12 by Ady TZIDON (Solution Posted, 2 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 5Minding mines. (in Just Math)
Posted on 2015-02-07 by Ady TZIDON (No Solution Yet, 1 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: 1 of 5Quite a normal question (in Riddles) Rating: 5.00
Posted on 2015-02-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Hat #10 (in Word Problems)
Posted on 2015-01-27 by Ady TZIDON (Solution Posted, 4 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: 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: 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: 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: 4 of 5T times T creates another T?? (in Just Math) Rating: 4.00
Posted on 2015-01-11 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 2 of 5A Cryptajoke III (in Cryptography)
Posted on 2015-01-09 by Ady TZIDON (Solution Posted, 1 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 5Cows and buffaloes. (in Just Math) Rating: 3.00
Posted on 2015-01-07 by Ady TZIDON (Solution Posted, 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: 2 of 5R.I.P., J.C. (in Logic)
Posted on 2015-01-02 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 525k if beheaded (in Just Math) Rating: 3.00
Posted on 2015-01-01 by Ady TZIDON (Solution Posted, 3 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 5Pentagon's constant (in Geometry) Rating: 4.00
Posted on 2014-12-27 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 54d divides 5d (in Just Math) Rating: 5.00
Posted on 2014-12-26 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Marked squares (in Just Math)
Posted on 2014-12-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Count the Liars (in Liars and Knights) Rating: 3.00
Posted on 2014-12-23 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 4 of 5The medians of medians (in Just Math) Rating: 4.00
Posted on 2014-12-20 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5Compare sizes (in Just Math)
Posted on 2014-12-18 by Ady TZIDON (Solution Posted, 3 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: 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 5Which is which (in Cryptography) Rating: 4.00
Posted on 2014-12-10 by Ady TZIDON (No Solution Yet, 9 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: 4 of 5Test #7 (in Word Problems)
Posted on 2014-12-03 by Ady TZIDON (Solution Posted, 7 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: 4 of 5A cryptic toast (in Cryptography)
Posted on 2014-11-24 by Ady TZIDON (Solution Posted, 1 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 5A symmetric relation (in Just Math)
Posted on 2014-11-19 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Just a tiny addition (in Just Math)
Posted on 2014-11-18 by Ady TZIDON (Solution Posted, 5 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 5Well said (in General)
Posted on 2014-11-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5An aSCending SCale (in Word Problems)
Posted on 2014-11-14 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 2 of 5My numbers (in Numbers) Rating: 3.00
Posted on 2014-11-14 by Ady TZIDON (Solution Posted, 3 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 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 5Win some, lose some (in Logic) Rating: 1.00
Posted on 2014-11-03 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Fridays (in Numbers)
Posted on 2014-11-03 by Ady TZIDON (Solution Posted, 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: 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 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: 1 of 5One by two (in Numbers) Rating: 3.50
Posted on 2014-10-22 by Ady TZIDON (Solution Posted, 6 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 5Farmer Giles (in Just Math)
Posted on 2014-10-21 by Ady TZIDON (Solution Posted, 4 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 5My products (in General)
Posted on 2014-10-15 by Ady TZIDON (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: 4 of 5Cryptajoke II (in Cryptography)
Posted on 2014-10-11 by Ady TZIDON (Solution Posted, 3 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 5Draw and go (in Probability)
Posted on 2014-10-08 by Ady TZIDON (No Solution Yet, 14 Comments)
Difficulty: 3 of 5Zeroless or not? (in Probability) Rating: 4.00
Posted on 2014-10-07 by Ady TZIDON (Solution Posted, 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: 2 of 5Determine divisibility (in Just Math)
Posted on 2014-09-29 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Only one basic solution II (in General) Rating: 3.00
Posted on 2014-09-26 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Fill in (in Sequences) Rating: 5.00
Posted on 2014-09-24 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Twelve (!) tribes (?) II (in Word Problems) Rating: 3.00
Posted on 2014-09-23 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Max and Min (in Just Math)
Posted on 2014-09-22 by Ady TZIDON (Solution Posted, 3 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 5Pick a letter (in Logic)
Posted on 2014-09-18 by Ady TZIDON (Solution Posted, 4 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: 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 52 pandigital equations (in Numbers)
Posted on 2014-09-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5Fibo's quickie (in Logic) Rating: 4.00
Posted on 2014-09-03 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Hi there, Pascal (in Numbers)
Posted on 2014-09-01 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Test #5 (in Word Problems)
Posted on 2014-08-31 by Ady TZIDON (Solution Posted, 1 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: 3 of 5Test #4 (in General)
Posted on 2014-08-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Known to you? (in General)
Posted on 2014-08-16 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Three subsets (in Just Math) Rating: 5.00
Posted on 2014-08-15 by Ady TZIDON (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Test #3 (in General) Rating: 2.00
Posted on 2014-08-13 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Guessing ages (in Tricks)
Posted on 2014-08-08 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Members' quorum (in Numbers)
Posted on 2014-08-07 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Find a Frenzy Fibo (in Numbers)
Posted on 2014-08-06 by Ady TZIDON (Solution Posted, 2 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: 2 of 5Mnemonics (in General)
Posted on 2014-08-01 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Easy count (in Just Math)
Posted on 2014-07-29 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Test #1 (in Numbers)
Posted on 2014-07-29 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5One of a kind (in Just Math)
Posted on 2014-07-27 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5The decisive straw (in Probability)
Posted on 2014-07-25 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 53 out of 7 (in Word Problems)
Posted on 2014-07-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Last digit counts (in Numbers)
Posted on 2014-07-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Getting 13 (in Just Math) Rating: 4.00
Posted on 2014-07-21 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 1 of 5P,Sq,P (in Numbers)
Posted on 2014-07-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5The twelve(!) tribes(?) (in General) Rating: 5.00
Posted on 2014-07-20 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Not true (in Numbers)
Posted on 2014-07-17 by Ady TZIDON (Solution Posted, 1 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 5 Two sensors (in Just Math)
Posted on 2014-07-15 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Confucius advises (in Word Problems)
Posted on 2014-07-14 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A periodical fraction (in Numbers) Rating: 1.50
Posted on 2014-07-11 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5To anagram segments is important,but... (in Cryptography) Rating: 4.00
Posted on 2014-07-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 53 features (in Numbers)
Posted on 2014-07-08 by Ady TZIDON (Solution Posted, 1 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: 2 of 5Cryptajoke I (in Cryptography)
Posted on 2014-07-07 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Go on, it is easy (in General)
Posted on 2014-07-05 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Only one basic solution (in Just Math)
Posted on 2014-07-02 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Neither a borrower nor a lender be, (in Just Math)
Posted on 2014-07-01 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Next word, please (in Sequences)
Posted on 2014-06-30 by Ady TZIDON (Solution Posted, 0 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 5Leonardo's game (in Games)
Posted on 2014-06-27 by Ady TZIDON (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: 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 53 more hats II (in General)
Posted on 2014-06-20 by Ady TZIDON (No Solution Yet, 2 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 5Three Digit Trial revisited (in Numbers) Rating: 3.50
Posted on 2014-06-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5A simple power (in Just Math)
Posted on 2014-06-13 by Ady TZIDON (Solution Posted, 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: 4 of 5Yankee dollar (in Just Math)
Posted on 2014-06-06 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Ways and means (in Tricks) Rating: 1.75
Posted on 2014-06-05 by Ady TZIDON (Solution Posted, 11 Comments)
Difficulty: 2 of 54 ways (in Sequences) Rating: 4.00
Posted on 2014-06-04 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 2 of 5Elementary is easy (in Sequences)
Posted on 2014-06-04 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 53 more hats (in General)
Posted on 2014-06-02 by Ady TZIDON (Solution Posted, 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: 2 of 5The pandigital student (in Cryptography) Rating: 3.00
Posted on 2014-05-29 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5M.A.R. observed: (in Word Problems)
Posted on 2014-05-28 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Why Haydn ? (in Numbers)
Posted on 2014-05-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5The first two hats (in General)
Posted on 2014-05-20 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5A progressive addition (in Numbers)
Posted on 2014-05-19 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5The highest prime (in Numbers)
Posted on 2014-05-16 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 2 of 5Hard times (in Cryptography)
Posted on 2014-05-15 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 55 unknown digits (in Numbers)
Posted on 2014-05-13 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Pandigital concatenations (in Numbers)
Posted on 2014-05-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Not in every dictionary (in Cryptography)
Posted on 2014-05-09 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5NEWS (in Word Problems)
Posted on 2014-05-09 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Big spenders (in Cryptography)
Posted on 2014-05-07 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Scitemahpla (in General)
Posted on 2014-05-03 by Ady TZIDON (Solution Posted, 16 Comments)
Difficulty: 4 of 5Without you (in Numbers)
Posted on 2014-04-30 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5The end of the line (in Cryptography)
Posted on 2014-04-29 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 1 of 5I / O resolved (in Logic) Rating: 5.00
Posted on 2014-04-28 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Whachamacallit? (in Word Problems)
Posted on 2014-04-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Half of 4X4 (in Numbers)
Posted on 2014-04-24 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Increase or decrease by one (in Numbers)
Posted on 2014-04-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Trivia (in Numbers)
Posted on 2014-04-21 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 3 of 5Odd numbers (in Numbers)
Posted on 2014-04-20 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Neighbors (in Numbers)
Posted on 2014-04-18 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 4 of 5No way to win (in General)
Posted on 2014-04-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Mod 3 alphametics (in Just Math)
Posted on 2014-04-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5My phone is 2543663 (in Probability) Rating: 3.50
Posted on 2014-04-15 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5Pseudo-FIBO (in Sequences)
Posted on 2014-04-14 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 4 of 5The right subset (in Word Problems)
Posted on 2014-04-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Upside down (OEIS A045573) (in Numbers)
Posted on 2014-04-11 by Ady TZIDON (Solution Posted, 6 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 5What digit? (in Numbers)
Posted on 2014-04-08 by Ady TZIDON (Solution Posted, 1 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 5Directly from Lucas (in Sequences)
Posted on 2014-04-04 by Ady TZIDON (No Solution Yet, 1 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 5Years & numbers (in Numbers)
Posted on 2014-04-02 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Integers only (in Sequences)
Posted on 2014-03-31 by Ady TZIDON (Solution Posted, 7 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: 4 of 5Harmless? (in General)
Posted on 2014-03-26 by Ady TZIDON (No Solution Yet, 2 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 5A coded phrase (in General)
Posted on 2014-03-24 by Ady TZIDON (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 5About two and seven (in Numbers)
Posted on 2014-03-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Seven come eleven II (in Numbers)
Posted on 2014-03-16 by Ady TZIDON (Solution Posted, 1 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: 4 of 5Ady's RH problem (in Logic)
Posted on 2014-03-11 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 4 of 5A permuted multiplication (in Numbers)
Posted on 2014-03-11 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Pythagorean triangle (in Just Math)
Posted on 2014-03-10 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5A partial deck (in Numbers)
Posted on 2014-03-05 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Prime+reversal= prime (in Numbers)
Posted on 2014-03-04 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Reverso (in Numbers)
Posted on 2014-02-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Riding the time machine (in General)
Posted on 2014-02-24 by Ady TZIDON (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 5What did I miss? (in Just Math)
Posted on 2014-02-14 by Ady TZIDON (No Solution Yet, 1 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 5An after-dinner enigma (in Just Math)
Posted on 2014-02-05 by Ady TZIDON (No Solution Yet, 1 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 5Four special squares (in Numbers)
Posted on 2014-01-30 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5N & n (in Just Math)
Posted on 2014-01-27 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 2 of 5Geography? Spelling? Logic? (in Tricks)
Posted on 2014-01-24 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5An economic reality (in General) Rating: 3.00
Posted on 2014-01-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Maximizing Matches Model (in Numbers)
Posted on 2014-01-22 by Ady TZIDON (Solution Posted, 16 Comments)
Difficulty: 2 of 5Probing the prob. (in Probability) Rating: 3.00
Posted on 2014-01-21 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Created after midnight (in General) Rating: 3.00
Posted on 2014-01-20 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5Advanced alphametics (in Numbers)
Posted on 2014-01-17 by Ady TZIDON (Solution Posted, 8 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: 3 of 5U * I = $$$ (in General) Rating: 3.00
Posted on 2014-01-14 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Coin flips (in Numbers) Rating: 4.00
Posted on 2014-01-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5A missing proverb (in General) Rating: 3.00
Posted on 2014-01-09 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 1 of 5A missing symbol (in Word Problems)
Posted on 2014-01-08 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A quotation (in Numbers)
Posted on 2014-01-07 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A hidden message (in Cryptography)
Posted on 2014-01-06 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Pairagrams (in Word Problems)
Posted on 2013-12-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Palindromic and prime (in Numbers)
Posted on 2013-12-30 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5A sum of 3 (in Numbers)
Posted on 2013-12-27 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5A neat trick (in Tricks) Rating: 4.00
Posted on 2013-12-26 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Madam Marathon (in Just Math) Rating: 2.00
Posted on 2013-12-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5On the same line (in Geometry)
Posted on 2013-12-22 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Hats revisited (in Probability)
Posted on 2013-12-19 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5 Algorithm requested (in Algorithms) Rating: 4.00
Posted on 2013-12-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5One out of ninety (in Weights and Scales) Rating: 4.00
Posted on 2013-12-17 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 4 of 5The unhappy end(= 58623L* ) (in General) Rating: 4.50
Posted on 2013-12-13 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Last but not the least (in Numbers)
Posted on 2013-12-12 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 2 of 5Who's asking? (in Word Problems)
Posted on 2013-12-11 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5A 6-digit answer (in Numbers)
Posted on 2013-11-24 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Eve & Odd (in Numbers)
Posted on 2013-11-22 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5LCM equation (in Numbers) Rating: 4.00
Posted on 2013-11-19 by Ady TZIDON (No Solution Yet, 5 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 5Define winning strategy (in Games)
Posted on 2013-11-14 by Ady TZIDON (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 5Two possible sums (in Numbers)
Posted on 2013-11-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 55*90 90 5*6 1605 2##6X (in General) Rating: 4.33
Posted on 2013-11-07 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Two ways (in Just Math) Rating: 3.67
Posted on 2013-10-31 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5As easy as 123 (in Numbers)
Posted on 2013-10-25 by Ady TZIDON (Solution Posted, 1 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 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: 3 of 5No multiplication allowed (in Numbers)
Posted on 2013-10-17 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 3 of 5Geo-alphametic (in General) Rating: 3.00
Posted on 2013-10-16 by Ady TZIDON (Solution Posted, 2 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: 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 5First Floobles Factorization (in General) Rating: 4.00
Posted on 2013-10-04 by Ady TZIDON (No Solution Yet, 2 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 5Eleven is a factor (in Numbers)
Posted on 2013-09-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Maximizing product (in Geometry)
Posted on 2013-09-19 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Prime with distinct digits (in Numbers)
Posted on 2013-09-18 by Ady TZIDON (Solution Posted, 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 5Staggered divisibility (in Numbers)
Posted on 2013-09-16 by Ady TZIDON (No Solution Yet, 3 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: 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, 1 Comments)
Difficulty: 2 of 5Two top targets (in Numbers)
Posted on 2013-09-06 by Ady TZIDON (No Solution Yet, 2 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: 2 of 5NegaFibo series (in Numbers)
Posted on 2013-08-29 by Ady TZIDON (No Solution Yet, 2 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 5FOUR SQUARES (in Numbers)
Posted on 2013-08-23 by Ady TZIDON (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: 2 of 5Habeas corpus (in Word Problems)
Posted on 2013-08-14 by Ady TZIDON (No Solution Yet, 1 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: 2 of 5Not applicable to driving (in Riddles)
Posted on 2013-08-08 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Round Results (in Numbers)
Posted on 2013-08-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Au vs Pb (in General)
Posted on 2013-08-01 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5Remember that (in Numbers) Rating: 3.67
Posted on 2013-07-30 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Maximizing sum (in Numbers)
Posted on 2013-07-29 by Ady TZIDON (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: 2 of 5Only one untrue statement (in Logic) Rating: 3.00
Posted on 2013-07-18 by Ady TZIDON (Solution Posted, 10 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: 4 of 5S.o.d. classification (in Just Math)
Posted on 2013-07-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5It's now out! (in Numbers)
Posted on 2013-07-10 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5One is a sum (in Numbers)
Posted on 2013-07-05 by Ady TZIDON (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: 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: 2 of 5 Euler erred (in Just Math)
Posted on 2013-06-25 by Ady TZIDON (No Solution Yet, 1 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 5Words, words, numbers (in Word Problems)
Posted on 2013-06-21 by Ady TZIDON (No Solution Yet, 2 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: 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: 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: 1 of 5B & G (in Logic) Rating: 1.00
Posted on 2013-06-03 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Q: What is this sum? (in Numbers)
Posted on 2013-05-31 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5You & you (in Word Problems) Rating: 4.00
Posted on 2013-05-30 by Ady TZIDON (Solution Posted, 6 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 5Get the facts (in Word Problems)
Posted on 2013-05-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Compare two problems (in Just Math)
Posted on 2013-05-20 by Ady TZIDON (Solution Posted, 3 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: 2 of 5What's wrong with him? (in Tricks)
Posted on 2013-05-16 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Odd steps (in Numbers)
Posted on 2013-05-08 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No comments (in Numbers) Rating: 3.50
Posted on 2013-05-07 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Hatu ,Utah?? (in Word Problems)
Posted on 2013-05-06 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Fibo and GCD (in Numbers)
Posted on 2013-05-02 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Generalize (in Numbers)
Posted on 2013-05-01 by Ady TZIDON (No Solution Yet, 5 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: 1 of 5How much and why ? (in Logic)
Posted on 2013-04-22 by Ady TZIDON (No Solution Yet, 2 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, 8 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 5Close neighbours (in Just Math)
Posted on 2013-04-15 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5As low as possible (in Numbers)
Posted on 2013-04-12 by Ady TZIDON (No Solution Yet, 6 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: 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 5The sum = the product (in Just Math)
Posted on 2013-04-04 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Mission impossible (in Just Math) Rating: 4.00
Posted on 2013-04-03 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5D is harder than C (in Just Math) Rating: 4.67
Posted on 2013-03-29 by Ady TZIDON (Solution Posted, 11 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: 3 of 5Ten items to classify (in General) Rating: 5.00
Posted on 2013-03-27 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 4 of 5Bartender to his apprentice: (in Numbers)
Posted on 2013-03-26 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5So many ways.... (in Numbers)
Posted on 2013-03-21 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Inequality challenged (in Just Math)
Posted on 2013-03-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Ecin reversal! (in Numbers)
Posted on 2013-03-18 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Goldbach revisited (in Numbers)
Posted on 2013-03-15 by Ady TZIDON (No Solution Yet, 2 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 5Three neighbours (in Numbers)
Posted on 2013-03-08 by Ady TZIDON (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: 2 of 5Math spelling (in Word Problems) Rating: 5.00
Posted on 2013-03-04 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 2 of 5Trespassing (in Cryptography) Rating: 5.00
Posted on 2013-03-01 by Ady TZIDON (No Solution Yet, 1 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: 4 of 5On congruent numbers (in Numbers)
Posted on 2013-02-24 by Ady TZIDON (No Solution Yet, 2 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: 4 of 5From proverbs to alphametics (in General)
Posted on 2013-02-15 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 3 of 5A false claim (in Numbers)
Posted on 2013-02-05 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Confused? (in Riddles)
Posted on 2013-02-04 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Arrangements count (in Just Math)
Posted on 2013-01-31 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Below 5K (in Just Math)
Posted on 2013-01-28 by Ady TZIDON (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: 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)
Posted on 2013-01-23 by Ady TZIDON (No Solution Yet, 2 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: 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 5Prime it remains (in Numbers) Rating: 4.00
Posted on 2013-01-15 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5A crowd of knights (in Numbers)
Posted on 2013-01-14 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A chain of odds (in Numbers)
Posted on 2013-01-11 by Ady TZIDON (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: 1 of 5Told by an integer (in Numbers) Rating: 4.00
Posted on 2013-01-04 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5The Seven Romans (in Logic) Rating: 5.00
Posted on 2013-01-02 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 2 of 5Just arithmetic signs (in Numbers) Rating: 2.33
Posted on 2012-12-28 by Ady TZIDON (Solution Posted, 10 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: 4 of 5One digit is missing (in General) Rating: 5.00
Posted on 2012-12-21 by Ady TZIDON (Solution Posted, 3 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: 3 of 5Surprised? (in Sequences)
Posted on 2012-12-15 by Ady TZIDON (Solution Posted, 2 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: 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: 2 of 5 Two Dominoes (in Probability)
Posted on 2012-12-04 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Why prime remainder? (in Just Math)
Posted on 2012-12-03 by Ady TZIDON (No Solution Yet, 1 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: 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)
Posted on 2012-11-23 by Ady TZIDON (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: 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 5Not a clear cut (in Logic)
Posted on 2012-11-18 by Ady TZIDON (No Solution Yet, 4 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 5The Bard as a source (in General)
Posted on 2012-11-09 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Long(infinite?) way to create a palindrome (in Numbers)
Posted on 2012-11-04 by Ady TZIDON (Solution Posted, 2 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 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 5Exploring HCNs (in Numbers)
Posted on 2012-10-26 by Ady TZIDON (No Solution Yet, 5 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 5White vs red (in Probability)
Posted on 2012-10-17 by Ady TZIDON (No Solution Yet, 1 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: 4 of 5P/Q (in Just Math) Rating: 4.00
Posted on 2012-10-12 by Ady TZIDON (No Solution Yet, 5 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: 1 of 5A tricky ricky quicky (in Sequences)
Posted on 2012-10-08 by Ady TZIDON (No Solution Yet, 2 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: 4 of 5Four Four-letter words (in General)
Posted on 2012-10-03 by Ady TZIDON (Solution Posted, 3 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: 2 of 5Very disappointed (in Cryptography)
Posted on 2012-09-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Neighboring strangers (in Just Math)
Posted on 2012-09-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Though this be madness, yet there is method in it... (in Numbers) Rating: 4.33
Posted on 2012-09-20 by Ady TZIDON (Solution Posted, 6 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 5A frugal sequence (in Numbers) Rating: 5.00
Posted on 2012-09-14 by Ady TZIDON (Solution Posted, 13 Comments)
Difficulty: 4 of 5A silly opinion (in General)
Posted on 2012-09-11 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5by L. Euler (in General) Rating: 5.00
Posted on 2012-09-08 by Ady TZIDON (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A palindrome product (in Numbers) Rating: 5.00
Posted on 2012-09-05 by Ady TZIDON (Solution Posted, 4 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: 3 of 5A Pythagorean triplet (in Numbers) Rating: 5.00
Posted on 2012-08-28 by Ady TZIDON (Solution Posted, 4 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: 4 of 5Who am I? (in Riddles)
Posted on 2012-08-21 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 586 at most (in Numbers)
Posted on 2012-08-18 by Ady TZIDON (Solution Posted, 2 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: 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: 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: 1 of 5A quicky (in Numbers) Rating: 5.00
Posted on 2012-07-31 by Ady TZIDON (Solution Posted, 6 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 5Pigeons again (in Sequences) Rating: 5.00
Posted on 2012-07-22 by Ady TZIDON (No Solution Yet, 2 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: 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: 4 of 5GIPSY ROAD: (in General) Rating: 5.00
Posted on 2012-07-12 by Ady TZIDON (No Solution Yet, 20 Comments)
Difficulty: 2 of 5Angles missing (in Geometry) Rating: 4.00
Posted on 2012-07-09 by Ady TZIDON (Solution Posted, 1 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: 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: 3 of 5Sum of primes is a square (in Numbers) Rating: 5.00
Posted on 2012-06-29 by Ady TZIDON (Solution Posted, 2 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: 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 5Prime, anyway (in Numbers) Rating: 3.00
Posted on 2012-06-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Find this cube! (in Numbers) Rating: 4.20
Posted on 2012-06-16 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 1 of 5Equal digits (in Numbers) Rating: 4.00
Posted on 2012-06-11 by Ady TZIDON (Solution Posted, 7 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 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 5Twice nine (in Numbers)
Posted on 2012-05-28 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5 A number pyramid (in Numbers)
Posted on 2012-05-18 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Ready, action…,CUT! (in Geometry) Rating: 3.00
Posted on 2012-05-16 by Ady TZIDON (Solution Posted, 19 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: 4 of 5Special palindromes (in Numbers)
Posted on 2012-05-11 by Ady TZIDON (Solution Posted, 2 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: 3 of 5Mirror, mirror (in Numbers) Rating: 5.00
Posted on 2012-05-04 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 1 of 5A red herring marble (in Logic)
Posted on 2012-05-01 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5SUMUS (in Just Math)
Posted on 2012-04-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Why did she do it? (in General) Rating: 5.00
Posted on 2012-04-19 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Loops in PI (in Logic) Rating: 4.50
Posted on 2012-04-15 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5No comments (in General) Rating: 4.50
Posted on 2012-04-12 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5The wine is so-so, but... (in Numbers) Rating: 3.75
Posted on 2012-04-06 by Ady TZIDON (Solution Posted, 8 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 5Some sums (in Sequences)
Posted on 2012-03-26 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5From primes to palindrome (in Numbers) Rating: 5.00
Posted on 2012-03-24 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 4 of 5Math. competition, (in Just Math) Rating: 4.00
Posted on 2012-03-21 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Build a triangle. (in Geometry)
Posted on 2012-03-15 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 53 causes 7 (in Numbers) Rating: 4.00
Posted on 2012-03-10 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Equality of ends (in Numbers)
Posted on 2012-03-04 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5Letter code (in Sequences) Rating: 4.50
Posted on 2012-02-27 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5S.o.d . of s.o.d ,,, (in Just Math) Rating: 4.00
Posted on 2012-02-21 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 539 does it (in Just Math) Rating: 5.00
Posted on 2012-02-19 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5Find Formula (in Sequences)
Posted on 2012-02-17 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 1 of 5Decimal base? Of course... (in Tricks) Rating: 4.50
Posted on 2012-02-13 by Ady TZIDON (Solution Posted, 15 Comments)
Difficulty: 3 of 5Special primes (in Numbers) Rating: 5.00
Posted on 2012-02-12 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Prime-go-round (in Numbers)
Posted on 2012-02-06 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 1 of 5Three digits - all prime! (in Numbers) Rating: 3.67
Posted on 2012-02-01 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Covering a rectangle by circles (in Shapes) Rating: 4.50
Posted on 2012-01-30 by Ady TZIDON (Solution Posted, 6 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 5Yes and no (in Just Math)
Posted on 2012-01-21 by Ady TZIDON (No Solution Yet, 1 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 5DIY prime magic (in Numbers)
Posted on 2012-01-13 by Ady TZIDON (Solution Posted, 10 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: 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: 3 of 5More about 1729 (in Numbers) Rating: 5.00
Posted on 2012-01-04 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 4 of 5It is not that easy (in General) Rating: 3.67
Posted on 2012-01-01 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Fair play (in Probability) Rating: 3.00
Posted on 2011-12-30 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A repunit number (in Numbers) Rating: 4.00
Posted on 2011-12-26 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5Two expressions (in Numbers)
Posted on 2011-12-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Find my number (in Numbers) Rating: 4.00
Posted on 2011-12-19 by Ady TZIDON (No Solution Yet, 10 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 5Ones or twos (in Just Math)
Posted on 2011-12-07 by Ady TZIDON (No Solution Yet, 4 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: 4 of 5Prime Order (in Just Math)
Posted on 2011-11-27 by Ady TZIDON (No Solution Yet, 1 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: 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: 2 of 5Some relation! (in Just Math) Rating: 3.00
Posted on 2011-11-11 by Ady TZIDON (No Solution Yet, 10 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 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: 2 of 5Angle of view (in Just Math)
Posted on 2011-10-28 by Ady TZIDON (No Solution Yet, 2 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: 1 of 5Three customers (in Logic) Rating: 3.40
Posted on 2011-10-17 by Ady TZIDON (Solution Posted, 9 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: 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: 1 of 5Seconds, anyone? (in Just Math) Rating: 5.00
Posted on 2011-10-03 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5RARE SURE QUORA (in Just Math) Rating: 5.00
Posted on 2011-10-02 by Ady TZIDON (Solution Posted, 7 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: 2 of 5Q: What time is it now, dear R.? (in Just Math) Rating: 4.67
Posted on 2011-09-19 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 3 of 51st+2nd=3rd (in Numbers) Rating: 5.00
Posted on 2011-09-14 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5A sound advice (in Word Problems)
Posted on 2011-09-12 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 4 of 512 ways (in Numbers)
Posted on 2011-09-08 by Ady TZIDON (No Solution Yet, 4 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: 4 of 5Melting the ice (in General) Rating: 5.00
Posted on 2011-09-01 by Ady TZIDON (No Solution Yet, 12 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 5Romanumerals (in Just Math)
Posted on 2011-08-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Icy winter shifting (in Just Math) Rating: 5.00
Posted on 2011-08-24 by Ady TZIDON (Solution Posted, 4 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: 4 of 5As easy as... ABC? ...123? (in General) Rating: 4.00
Posted on 2011-08-18 by Ady TZIDON (Solution Posted, 12 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: 1 of 5Wherefrom thou comest, mylady? (in Logic) Rating: 4.67
Posted on 2011-08-11 by Ady TZIDON (Solution Posted, 4 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: 1 of 5Prove irrationality (in Just Math) Rating: 5.00
Posted on 2011-08-07 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Get out of here... (in General) Rating: 5.00
Posted on 2011-08-05 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5How many roots? (in Just Math)
Posted on 2011-07-31 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5Compare (in Just Math)
Posted on 2011-07-26 by Ady TZIDON (No Solution Yet, 3 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 5At the party (in Logic) Rating: 4.00
Posted on 2011-07-22 by Ady TZIDON (No Solution Yet, 2 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: 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: 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 52B or B2? (in Word Problems) Rating: 4.00
Posted on 2011-07-06 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Yosi will be 13 years old (in General) Rating: 5.00
Posted on 2011-07-04 by Ady TZIDON (No Solution Yet, 11 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: 4 of 5Cover-up (in Shapes) Rating: 4.50
Posted on 2011-06-23 by Ady TZIDON (Solution Posted, 4 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 5By all means (in Just Math)
Posted on 2011-06-16 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Who said to whom and when? (in Cryptography) Rating: 4.00
Posted on 2011-06-13 by Ady TZIDON (Solution Posted, 3 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 5Lies all around (in Liars and Knights) Rating: 4.67
Posted on 2011-06-04 by Ady TZIDON (Solution Posted, 10 Comments)
Difficulty: 4 of 5Tzidon's enigma (in Numbers) Rating: 4.00
Posted on 2011-06-01 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5A well-defined age (in Just Math)
Posted on 2011-05-23 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5Take five (in Just Math) Rating: 3.67
Posted on 2011-05-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5How young is he? (in Just Math) Rating: 3.00
Posted on 2011-05-16 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Sloane will not help you (in Sequences) Rating: 4.33
Posted on 2011-05-15 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5A Royal Question (in Word Problems) Rating: 4.50
Posted on 2011-05-13 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5Any Guesses? (in Sequences)
Posted on 2011-05-05 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5An old one (in Just Math)
Posted on 2011-05-02 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 5 of 50 9357254 (in General) Rating: 5.00
Posted on 2011-04-29 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5S.O.S. partition needed!! (in Just Math)
Posted on 2011-04-23 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Mission impossible (in Just Math)
Posted on 2011-04-18 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Makes a difference (in Just Math)
Posted on 2011-04-14 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Not a fraction (in Just Math) Rating: 4.00
Posted on 2011-04-11 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Find the area (in Numbers) Rating: 4.00
Posted on 2011-04-08 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5The median is shorter (in Geometry)
Posted on 2011-04-04 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 1 of 5Almost equal (in Just Math) Rating: 3.75
Posted on 2011-04-01 by Ady TZIDON (Solution Posted, 10 Comments)
Difficulty: 3 of 5Back to the base (in Numbers) Rating: 3.00
Posted on 2011-03-30 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Twice true (in Numbers) Rating: 4.50
Posted on 2011-03-24 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5My stock (in Numbers) Rating: 4.33
Posted on 2011-03-19 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5So many quintuplets... (in Just Math) Rating: 4.00
Posted on 2011-03-17 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Neither 3 nor 6 (in Just Math)
Posted on 2011-03-11 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Two happy ends (in Just Math)
Posted on 2011-03-07 by Ady TZIDON (Solution Posted, 11 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 5Three W answers (in Numbers) Rating: 4.00
Posted on 2011-02-27 by Ady TZIDON (No Solution Yet, 6 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: 4 of 5 EVEN remains even (in Numbers) Rating: 4.00
Posted on 2011-02-20 by Ady TZIDON (Solution Posted, 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: 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: 2 of 5How would you bet? (in Probability)
Posted on 2011-02-13 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5 Find the area (in Geometry) Rating: 3.67
Posted on 2011-02-09 by Ady TZIDON (Solution Posted, 4 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 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, 5 Comments)
Difficulty: 4 of 5Start as you wish (in Numbers)
Posted on 2011-01-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Forecasting dates (in Numbers)
Posted on 2011-01-27 by Ady TZIDON (Solution Posted, 1 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 5Just P&P (in Numbers) Rating: 4.00
Posted on 2011-01-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 3 of 5A binary enigma (in Games)
Posted on 2011-01-21 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Get the last digit (in Numbers) Rating: 4.00
Posted on 2011-01-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5I WONDER (in Logic) Rating: 4.00
Posted on 2011-01-13 by Ady TZIDON (Solution Posted, 10 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: 2 of 5Powers of primes (in Numbers)
Posted on 2011-01-06 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Happy New Year (in Numbers)
Posted on 2011-01-01 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 1 of 5only one (in Numbers) Rating: 4.50
Posted on 2010-12-28 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5Pandigital and divisible (in Probability)
Posted on 2010-12-26 by Ady TZIDON (Solution Posted, 4 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: 2 of 5Ambiguous dice (in Just Math)
Posted on 2010-12-21 by Ady TZIDON (No Solution Yet, 3 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 5Nine nine-digits results (in Just Math)
Posted on 2010-12-16 by Ady TZIDON (Solution Posted, 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 5Seven come eleven (in Numbers) Rating: 4.00
Posted on 2010-12-11 by Ady TZIDON (Solution Posted, 12 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: 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 5Music to your ears (in Word Problems)
Posted on 2010-11-28 by Ady TZIDON (No Solution Yet, 3 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: 3 of 5Count them (in Numbers)
Posted on 2010-11-22 by Ady TZIDON (No Solution Yet, 2 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 5srebmuN desreveR (in Just Math) Rating: 3.00
Posted on 2010-11-18 by Ady TZIDON (Solution Posted, 4 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: 2 of 5Magic, but limited (in Just Math)
Posted on 2010-11-12 by Ady TZIDON (No Solution Yet, 1 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 5Who is afraid of 7 (or 23) ? (in Numbers)
Posted on 2010-11-08 by Ady TZIDON (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: 4 of 5Abracadabra (in Word Problems) Rating: 3.00
Posted on 2010-10-29 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 555th in the list (in Numbers)
Posted on 2010-10-28 by Ady TZIDON (No Solution Yet, 6 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 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: 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: 2 of 5And her true age is... (in Just Math) Rating: 2.50
Posted on 2010-10-14 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5A square question (in Games) Rating: 3.00
Posted on 2010-10-12 by Ady TZIDON (No Solution Yet, 2 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: 2 of 5Three forever (in Tricks) Rating: 2.75
Posted on 2010-09-30 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Roman matches (in Logic)
Posted on 2010-09-28 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5 Nineteen triplets (in Just Math) Rating: 3.00
Posted on 2010-09-23 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Rationalize by factorials (in Numbers) Rating: 3.50
Posted on 2010-09-22 by Ady TZIDON (Solution Posted, 2 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: 1 of 512 chairs (in General)
Posted on 2010-09-14 by Ady TZIDON (Solution Posted, 5 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, 3 Comments)
Difficulty: 2 of 5Tennis,anyone? (in Probability) Rating: 5.00
Posted on 2010-09-07 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 1 of 5Four sevens and one one. (in Numbers)
Posted on 2010-09-06 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 2 of 5Nostra culpa (in Numbers) Rating: 3.00
Posted on 2010-09-03 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Find my password (in Word Problems) Rating: 4.00
Posted on 2010-08-31 by Ady TZIDON (Solution Posted, 2 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: 2 of 5As easy as pie (in Word Problems) Rating: 3.00
Posted on 2010-08-26 by Ady TZIDON (Solution Posted, 17 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: 2 of 5Anyway (in Numbers) Rating: 4.00
Posted on 2010-08-16 by Ady TZIDON (Solution Posted, 4 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: 1 of 5Trust me (in Logic)
Posted on 2010-08-10 by Ady TZIDON (Solution Posted, 6 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: 2 of 518-yes, 17-maybe (in Just Math)
Posted on 2010-08-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Ramanujan enforced. (in Numbers)
Posted on 2010-08-02 by Ady TZIDON (Solution Posted, 5 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: 4 of 5POWER CHAIN. (in Sequences)
Posted on 2010-07-22 by Ady TZIDON (No Solution Yet, 6 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 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: 2 of 5FOUR OR LESS (in Numbers) Rating: 4.00
Posted on 2010-07-05 by Ady TZIDON (Solution Posted, 3 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 5Magma et al. (in Word Problems) Rating: 4.50
Posted on 2010-06-30 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Do not D&D (in Word Problems) Rating: 3.00
Posted on 2010-06-28 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 2 of 5The coat of many (in Word Problems)
Posted on 2010-06-24 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5129 digits (in Numbers)
Posted on 2010-06-18 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 2 of 5Goldbach revisited (in Numbers) Rating: 3.00
Posted on 2010-06-12 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 1 of 5A Magic Die (in Probability) Rating: 4.50
Posted on 2010-06-10 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 3 of 5Chain Gang- a contest and a game (in Word Problems)
Posted on 2010-05-30 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Make it equal (in Numbers) Rating: 3.00
Posted on 2010-05-26 by Ady TZIDON (Solution Posted, 7 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 5Let's count (in Numbers) Rating: 2.50
Posted on 2010-05-16 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5Power of two (in Just Math) Rating: 4.00
Posted on 2010-05-12 by Ady TZIDON (Solution Posted, 1 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 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 5Simple question gets a complicated answer (in Just Math) Rating: 3.00
Posted on 2010-05-02 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 3 of 5All the colors in (in Probability) Rating: 5.00
Posted on 2010-04-26 by Ady TZIDON (Solution Posted, 21 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 5Using 128 digits (in Cryptography) Rating: 4.00
Posted on 2010-04-19 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 1 of 5Unique semiprime number (in Numbers)
Posted on 2010-04-17 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Four or else (in Numbers)
Posted on 2010-04-11 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 2 of 5Outstanding numbers (in Word Problems) Rating: 4.00
Posted on 2010-04-06 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Try to crack the code. (in Word Problems) Rating: 4.00
Posted on 2010-04-04 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Any early warnings? (in Word Problems) Rating: 4.00
Posted on 2010-04-02 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Counting triplets (in Numbers) Rating: 4.00
Posted on 2010-03-31 by Ady TZIDON (Solution Posted, 7 Comments)
Difficulty: 2 of 5More than one way to skin a cat (in Sequences)
Posted on 2010-03-24 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Gambler's triangulation (in Probability) Rating: 3.50
Posted on 2010-03-18 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 4 of 545 4218 68 *559 4218 (in Numbers) Rating: 4.00
Posted on 2010-03-16 by Ady TZIDON (No Solution Yet, 3 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: 2 of 5Pigeons will like it (in Numbers)
Posted on 2010-03-08 by Ady TZIDON (No Solution Yet, 2 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 5Little cubes (in Numbers) Rating: 4.00
Posted on 2010-02-27 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5Polish your French (in Word Problems)
Posted on 2010-02-22 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5The three sides and the height (in Numbers)
Posted on 2010-02-15 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 4 of 5Si fueris Romae (in Numbers) Rating: 3.60
Posted on 2010-02-12 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5A streetcar named Enigma (in Numbers) Rating: 4.67
Posted on 2010-02-10 by Ady TZIDON (Solution Posted, 10 Comments)
Difficulty: 2 of 5Hotter and hotter (in Numbers) Rating: 2.33
Posted on 2010-02-08 by Ady TZIDON (Solution Posted, 10 Comments)
Difficulty: 4 of 5Lucky seven (in Numbers) Rating: 4.00
Posted on 2010-02-05 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 4 of 5My travel IN SOME ORDER (in Numbers)
Posted on 2010-02-01 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Enough is enough (in Games)
Posted on 2010-01-29 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5four or more (in Numbers) Rating: 4.00
Posted on 2010-01-25 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5BIG , BIGGER , BIGGEST (in Numbers) Rating: 3.00
Posted on 2004-08-12 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 2 of 5A square (in Numbers) Rating: 3.14
Posted on 2004-06-25 by Ady TZIDON (Solution Posted, 15 Comments)
Difficulty: 3 of 5my house's number (in Numbers) Rating: 4.50
Posted on 2004-06-21 by Ady TZIDON (Solution Posted, 32 Comments)
Difficulty: 4 of 5The odds stay unchanged (in Just Math) Rating: 4.27
Posted on 2004-06-17 by Ady TZIDON (Solution Posted, 21 Comments)
Difficulty: 3 of 5Easy does it (in Numbers) Rating: 5.00
Posted on 2016-03-26 by Ady TZIDON (No Solution Yet, 2 Comments)
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