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A comment on Martin Gardner's best mathematical puzzles. Parent comment

Re:Martin Gardner's best mathematical puzzles by ubernostrum on Tuesday October 21, 2014 @09:03AM (#8487078)
#7 is somewhat famous, and there are plenty of articles available on it if you google for the name of it.
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Re:Martin Gardner's best mathematical puzzles by mijoharas on Tuesday October 21, 2014 @04:05PM (#8489567)
Ahhhh... seems really obvious in retrospect. Thanks.
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