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Math Brain Teasers

Math brain teasers require computations to solve.

Brain Teasers

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  Title Popularity Difficulty Submittedv  
76 Once Prime, Always Prime *** ** 06/21/09 by whsprec
77 Square Peg *** ** 03/28/09 by mosca
78 Lines and Dots ** ** 02/23/09 by Jarhead
79 Beep Beep Beep ** *** 02/23/09 by bigSWAFF_69_
80 Half Again As Big *** **** 02/17/09 by javaguru
81 Less Than a Google *** *** 02/16/09 by javaguru
82 Six Villages *** **** 02/14/09 by javaguru
83 Rex and Ralph: Mystery Number *** **** 02/02/09 by javaguru
84 Rex and Ralph: Polygonal House *** **** 01/28/09 by javaguru
85 What Am I? *** ** 01/22/09 by Lord_Hawk
86 Greatest Product *** *** 01/20/09 by javaguru
87 4+4+4+4=2! *** *** 01/17/09 by javaguru
88 Rex and Ralph: Prime Clues *** **** 01/17/09 by javaguru
89 How Many Doctors *** ** 01/09/09 by fishmed
90 What Time? *** * 01/05/09 by twin27

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