Mathemagics: How to Look Like a Genius Without Really Trying

Mathemagics (Lowell House) is a guide to mental calculation by mathematician Arthur Benjamin, a performer of lightning arithmetic, and Michael Shermer, founder of Skeptic magazine. Starting with addition and subtraction from left to right, the authors teach shortcuts for multiplying two- and three-digit numbers, squaring numbers mentally, dividing, estimating and checking answers. They present each method as a trick that can be practiced and performed, turning arithmetic into a kind of magic show.

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Tim Ferriss: “There's a professor who was at Harvey Mudd who developed a book called Mathemagics .”