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Hardest Math Teasers

Math brain teasers require computations to solve.

These brain teasers have been voted as the most difficult. Only teasers with at least 20 votes are shown. Good luck solving them!

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Brain Teasers

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	Title	Popularity	Difficulty	Submitted
1	Six Villages			02/14/09	by javaguru
2	Half Again As Big			02/17/09	by javaguru
3	Formula			01/08/05	by DakarMorad
4	2 and 2 = 5			08/11/16	by dalfamnest
5	12-digit Oddities			01/05/09	by javaguru
6	Rex and Ralph: Mystery Number			02/02/09	by javaguru
7	Rex and Ralph: Polygonal House			01/28/09	by javaguru
8	Circles in a triangle			01/12/01	by offsky
9	Rex and Ralph: Prime Clues			01/17/09	by javaguru
10	Mathematicians			01/31/03	by rajeshwar
11	Coconut Craziness			01/11/22	by Hydra1234
12	Palindrome			12/30/03	by curtiss82
13	4+4+4+4=2!			01/17/09	by javaguru
14	The Length of the Train			01/06/21	by wimpykidfan37
15	Chess Games			12/05/04	by AXTON

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