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Difficulty: 3 of 5Oddly even numbers (in Numbers)
Posted on 2017-10-01 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The trio (in Liars and Knights)
Posted on 2017-08-21 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Combinatory logic (in Logic)
Posted on 2017-06-24 by Math Man (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Prime power puzzle (in Just Math) Rating: 5.00
Posted on 2017-04-01 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Fibonacci Fib (in Sequences) Rating: 5.00
Posted on 2017-02-23 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An interesting recurrence (in Numbers) Rating: 5.00
Posted on 2017-01-17 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 1 of 5Legally Blonde (in Liars and Knights) Rating: 3.00
Posted on 2016-12-19 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Terrific sequence 2 (in Sequences) Rating: 5.00
Posted on 2016-11-20 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Easy sequence (in Sequences)
Posted on 2016-09-20 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5A surprising prime gap (in Numbers) Rating: 5.00
Posted on 2016-07-27 by Math Man (Solution Posted, 8 Comments)
Difficulty: 2 of 5Circle cuts (in Shapes)
Posted on 2016-06-20 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Terrific sequence (in Sequences) Rating: 5.00
Posted on 2016-05-10 by Math Man (No Solution Yet, 6 Comments)
Difficulty: 3 of 5Countable sets (in Just Math)
Posted on 2016-03-15 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Primevens and primeodds (in Numbers) Rating: 4.00
Posted on 2016-01-10 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 3 of 5Numbered Letters IV (in Word Problems)
Posted on 2015-10-26 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Marissa's and Melissa's birthdays (in Logic)
Posted on 2015-09-17 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Numbers in pi (in Numbers)
Posted on 2015-08-21 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 1 of 5Lefties and righties (in Logic) Rating: 4.50
Posted on 2015-06-10 by Math Man (Solution Posted, 2 Comments)
Difficulty: 2 of 5Island Adventure 2 (in Liars and Knights)
Posted on 2015-04-21 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Island Adventure (in Liars and Knights)
Posted on 2015-03-26 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Composite prime (in Numbers) Rating: 5.00
Posted on 2015-02-24 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Potato puzzle (in Riddles)
Posted on 2015-01-13 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Number machine problem 2 (in Algorithms) Rating: 4.00
Posted on 2014-12-02 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Pokemon (in Sequences)
Posted on 2014-11-05 by Math Man (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Odd people 2 (in Liars and Knights) Rating: 2.67
Posted on 2014-10-07 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Stranger Danger (in Famous Riddles)
Posted on 2014-08-25 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Keys and boxes (in Logic) Rating: 2.50
Posted on 2014-07-31 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5An equation (in Just Math)
Posted on 2014-07-03 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Weird numbers (in Numbers)
Posted on 2014-05-02 by Math Man (Solution Posted, 2 Comments)
Difficulty: 2 of 5Colorful hats (in Logic) Rating: 2.00
Posted on 2014-04-16 by Math Man (Solution Posted, 6 Comments)
Difficulty: 3 of 5In pi at last (in Sequences)
Posted on 2014-03-24 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 58675309 (in Numbers)
Posted on 2014-02-26 by Math Man (Solution Posted, 2 Comments)
Difficulty: 4 of 5Coded Crossword 2 (in Cryptography) Rating: 5.00
Posted on 2014-01-24 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Unitary perfect numbers (in Just Math) Rating: 5.00
Posted on 2013-12-16 by Math Man (Solution Posted, 10 Comments)
Difficulty: 4 of 5Great sequence (in Sequences) Rating: 5.00
Posted on 2013-11-28 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Knaves! 2 (in Liars and Knights) Rating: 1.00
Posted on 2013-10-22 by Math Man (Solution Posted, 1 Comments)
Difficulty: 3 of 5Pidigital primes (in Numbers)
Posted on 2013-08-15 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Repunits and bases (in Numbers)
Posted on 2013-07-24 by Math Man (Solution Posted, 6 Comments)
Difficulty: 3 of 5The Exclusive Club (in Paradoxes) Rating: 5.00
Posted on 2013-07-01 by Math Man (No Solution Yet, 8 Comments)
Difficulty: 2 of 5A bee in my hand (in Riddles)
Posted on 2013-05-22 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Prime Fibonacci numbers (in Numbers)
Posted on 2013-05-03 by Math Man (Solution Posted, 3 Comments)
Difficulty: 1 of 5Liar Logic (in Liars and Knights) Rating: 5.00
Posted on 2013-04-11 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Code synonyms (in Word Problems)
Posted on 2013-03-14 by Math Man (Solution Posted, 1 Comments)
Difficulty: 2 of 5Fun sequence (in Sequences)
Posted on 2013-03-01 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Truthful days (in Logic)
Posted on 2013-01-31 by Math Man (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Triple 8 (in Numbers) Rating: 3.00
Posted on 2013-01-08 by Math Man (Solution Posted, 9 Comments)
Difficulty: 4 of 5Primary Problem 2 (in Just Math) Rating: 5.00
Posted on 2012-12-09 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 1 of 5QWERTY Quiz (in General)
Posted on 2012-11-12 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5The way to Normalville (in Liars and Knights) Rating: 3.75
Posted on 2012-10-05 by Math Man (Solution Posted, 13 Comments)
Difficulty: 5 of 5Metapuzzle (in Liars and Knights) Rating: 5.00
Posted on 2012-09-13 by Math Man (No Solution Yet, 4 Comments)
Difficulty: 3 of 5The number p (in Numbers) Rating: 4.00
Posted on 2012-08-19 by Math Man (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Mutually friendly 3 (in Logic) Rating: 5.00
Posted on 2012-08-05 by Math Man (Solution Posted, 11 Comments)
Difficulty: 3 of 5All 10 digits (in Probability) Rating: 5.00
Posted on 2012-07-06 by Math Man (Solution Posted, 5 Comments)
Difficulty: 2 of 5Day-knights and night-knights 4 (in Logic) Rating: 3.00
Posted on 2012-07-02 by Math Man (Solution Posted, 2 Comments)
Difficulty: 1 of 5Fruit prices (in Word Problems) Rating: 4.00
Posted on 2012-06-05 by Math Man (Solution Posted, 8 Comments)
Difficulty: 2 of 5Cheating by not cheating (in Riddles) Rating: 5.00
Posted on 2012-05-30 by Math Man (Solution Posted, 12 Comments)
Difficulty: 2 of 5Knaves! (in Liars and Knights)
Posted on 2012-05-21 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Minimal Primes (in Numbers) Rating: 4.67
Posted on 2012-04-24 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Weird sequence (in Sequences)
Posted on 2012-04-07 by Math Man (Solution Posted, 1 Comments)
Difficulty: 1 of 5Redundant questions (in Word Problems) Rating: 5.00
Posted on 2012-03-19 by Math Man (Solution Posted, 11 Comments)
Difficulty: 3 of 5Pi repeats (in Numbers) Rating: 5.00
Posted on 2012-02-29 by Math Man (Solution Posted, 3 Comments)
Difficulty: 3 of 5Logical connectives (in Algorithms) Rating: 4.50
Posted on 2012-01-24 by Math Man (Solution Posted, 6 Comments)
Difficulty: 3 of 5Prime or divisible by 3 (in Numbers)
Posted on 2011-12-23 by Math Man (Solution Posted, 1 Comments)
Difficulty: 1 of 5Not sexy! (in Just Math)
Posted on 2011-12-13 by Math Man (Solution Posted, 1 Comments)
Difficulty: 2 of 5Four people (in Liars and Knights)
Posted on 2011-11-28 by Math Man (Solution Posted, 1 Comments)
Difficulty: 3 of 5Numbered Words (in Word Problems) Rating: 4.00
Posted on 2011-11-04 by Math Man (Solution Posted, 2 Comments)
Difficulty: 4 of 5Coded Crossword (in Cryptography) Rating: 5.00
Posted on 2011-10-10 by Math Man (Solution Posted, 1 Comments)
Difficulty: 2 of 5Two-digit numbers (in Sequences) Rating: 4.33
Posted on 2011-09-29 by Math Man (Solution Posted, 4 Comments)
Difficulty: 2 of 5No primes 2 (in Numbers) Rating: 4.00
Posted on 2011-07-29 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Superprimes (in Numbers) Rating: 3.00
Posted on 2011-07-18 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Mutually friendly 2 (in Logic) Rating: 5.00
Posted on 2011-07-01 by Math Man (Solution Posted, 4 Comments)
Difficulty: 4 of 5Knights and Liars of the Round Table (in Liars and Knights) Rating: 3.00
Posted on 2011-06-10 by Math Man (Solution Posted, 4 Comments)
Difficulty: 3 of 5Interesting numbers (in Sequences) Rating: 3.00
Posted on 2011-06-07 by Math Man (Solution Posted, 3 Comments)
Difficulty: 3 of 5Will I get a dog? (in Logic) Rating: 4.00
Posted on 2011-05-20 by Math Man (Solution Posted, 6 Comments)
Difficulty: 3 of 5Joe's favorite number (in Liars and Knights) Rating: 4.00
Posted on 2011-04-27 by Math Man (Solution Posted, 4 Comments)
Difficulty: 2 of 5Random number sequence (in Probability)
Posted on 2011-04-20 by Math Man (Solution Posted, 2 Comments)
Difficulty: 4 of 5Factor numbers (in Just Math) Rating: 4.80
Posted on 2011-03-26 by Math Man (Solution Posted, 5 Comments)
Difficulty: 3 of 5Day-knights and night-knights 3 (in Logic) Rating: 1.00
Posted on 2011-03-21 by Math Man (Solution Posted, 1 Comments)
Difficulty: 3 of 5Prime times (in Numbers) Rating: 4.00
Posted on 2011-03-18 by Math Man (Solution Posted, 1 Comments)
Difficulty: 1 of 5Day-knights and night-knights 2 (in Logic) Rating: 5.00
Posted on 2011-03-15 by Math Man (Solution Posted, 2 Comments)
Difficulty: 3 of 5Time sequence (in Sequences)
Posted on 2011-03-10 by Math Man (Solution Posted, 1 Comments)
Difficulty: 1 of 5Day-knights and night-knights (in Logic) Rating: 3.00
Posted on 2011-03-08 by Math Man (Solution Posted, 3 Comments)
Difficulty: 2 of 5A fun prime number (in Numbers) Rating: 5.00
Posted on 2011-02-15 by Math Man (Solution Posted, 4 Comments)
Difficulty: 1 of 5Three people (in Liars and Knights)
Posted on 2011-02-14 by Math Man (Solution Posted, 3 Comments)
Difficulty: 3 of 5e^(e^x) (in Calculus)
Posted on 2011-02-08 by Math Man (Solution Posted, 5 Comments)
Difficulty: 3 of 5Knave trial (in Liars and Knights) Rating: 4.50
Posted on 2011-02-03 by Math Man (Solution Posted, 1 Comments)
Difficulty: 2 of 5A cool prime number (in Numbers) Rating: 4.00
Posted on 2011-01-27 by Math Man (Solution Posted, 3 Comments)
Difficulty: 4 of 5Gold rush (in Liars and Knights) Rating: 4.50
Posted on 2011-01-24 by Math Man (Solution Posted, 3 Comments)
Difficulty: 2 of 5A sequence (in Sequences) Rating: 3.50
Posted on 2011-01-14 by Math Man (Solution Posted, 3 Comments)
Difficulty: 2 of 5No primes (in Numbers) Rating: 4.33
Posted on 2011-01-08 by Math Man (Solution Posted, 4 Comments)
Difficulty: 3 of 5X and Y (in Liars and Knights) Rating: 4.00
Posted on 2011-01-04 by Math Man (Solution Posted, 3 Comments)
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