Life gets busy, and sometimes those basic math skills from school days get a little rusty. Whether you're budgeting, measuring for a DIY project, or just having a math-related brain teaser thrown your ...

is a math professor at Harvey Mudd College, but he's got a side gig, too: as a magician. His new book, "The Magic of Math," combines his two passions — which actually have a lot in common.

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Start with a deck of cards. Before the trick, sneak a peek at the 10th card in the deck. Memorize it. Ask your volunteer to add the first and second digit of their number together. For instance, if he ...

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