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Search results for problems posted by Ady TZIDON :
Difficulty: 3 of 5One of a kind (in Just Math)
Posted on 2014-07-27 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5The decisive straw (in Probability)
Posted on 2014-07-25 by Ady TZIDON (No Solution Yet, 5 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 (No Solution Yet, 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)
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 (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Neither a borrower nor a lender be, (in Just Math)
Posted on 2014-07-01 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Next word, please (in Sequences)
Posted on 2014-06-30 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Some dinner! (in Cryptography)
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: 5.00
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)
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, 2 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 (No Solution Yet, 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: 4.00
Posted on 2014-04-15 by Ady TZIDON (No Solution Yet, 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 (No Solution Yet, 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 (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Integers only (in Sequences)
Posted on 2014-03-31 by Ady TZIDON (No Solution Yet, 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 (No Solution Yet, 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 (No Solution Yet, 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 (No Solution Yet, 3 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)
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)
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)
Posted on 2014-01-21 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5Created after midnight (in General)
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 (No Solution Yet, 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)
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)
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)
Posted on 2013-12-18 by Ady TZIDON (Solution Posted, 2 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, 4 Comments)
Difficulty: 4 of 5The unhappy end(= 58623L* ) (in General) Rating: 4.00
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: 5.00
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)
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 (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Big areas (in Numbers)
Posted on 2013-09-17 by Ady TZIDON (No Solution Yet, 16 Comments)
Difficulty: 3 of 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 (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Round Results (in Numbers)
Posted on 2013-08-05 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 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 (No Solution Yet, 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: 5.00
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: 2.50
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)
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 (No Solution Yet, 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: 3.00
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)
Posted on 2013-04-10 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Pass the beer (in Probability)
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)
Posted on 2013-03-27 by Ady TZIDON (No Solution Yet, 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, 0 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 (No Solution Yet, 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 (No Solution Yet, 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 (No Solution Yet, 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)
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 (No Solution Yet, 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)
Posted on 2012-12-21 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 4 of 5All(?) about SEQ (in Numbers) Rating: 5.00
Posted on 2012-12-19 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Surprised? (in Sequences)
Posted on 2012-12-15 by Ady TZIDON (No Solution Yet, 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 (No Solution Yet, 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)
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, 4 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: 4.50
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 (No Solution Yet, 12 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 (No Solution Yet, 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: 5.00
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: 5.00
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 (No Solution Yet, 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 (No Solution Yet, 7 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 (No Solution Yet, 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: 5.00
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: 5.00
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: 5.00
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: 4.20
Posted on 2011-10-17 by Ady TZIDON (No Solution Yet, 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: 5.00
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, 1 Comments)
Difficulty: 3 of 5Icy winter shifting (in Just Math) Rating: 5.00
Posted on 2011-08-24 by Ady TZIDON (No Solution Yet, 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)
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: 5.00
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: 5.00
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)
Posted on 2011-06-13 by Ady TZIDON (No Solution Yet, 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: 5.00
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, 2 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, 3 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 (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Hail to thee, Sofia! (in Just Math) Rating: 3.00
Posted on 2010-12-13 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Seven come eleven (in Numbers) Rating: 4.00
Posted on 2010-12-11 by Ady TZIDON (No Solution Yet, 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)
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 (No Solution Yet, 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 (No Solution Yet, 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 (No Solution Yet, 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, 4 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)
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 (No Solution Yet, 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)
Posted on 2010-04-19 by Ady TZIDON (Solution Posted, 3 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)
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, 4 Comments)
Difficulty: 4 of 5The three sides and the height (in Numbers)
Posted on 2010-02-15 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Si fueris Romae (in Numbers) Rating: 3.25
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 (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Enough is enough (in Games)
Posted on 2010-01-29 by Ady TZIDON (No Solution Yet, 3 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: 2.83
Posted on 2004-06-25 by Ady TZIDON (Solution Posted, 13 Comments)
Difficulty: 3 of 5my house's number (in Numbers) Rating: 4.33
Posted on 2004-06-21 by Ady TZIDON (No Solution Yet, 31 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)
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