I will post a challenging math problem each day. The level of difficulty will vary, but most problems should not require any specialized knowledge beyond calculus. Problems are also posted on Twitter using the hashtag #mathpotd.
Tuesday, October 20, 2009
3D Tic-Tac-Toe
In how many ways can you get three in a row in three-dimensional tic-tac-toe (noughts and crosses)?
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