How can math help you win on the horses? What's the foolproof way to solve Sudoku? How can probability teach you to calculate your chances of survival in Russian roulette? In this irreverent and entertaining guide to mathematics, Lawrence Potter takes the fear out of everything from long division to percentages. Using fascinating puzzles and surprising examples, he shows us how math is connected with the world we encounter every day, from how the VAT works to why weather forecasts are wrong, from winning at Monopoly to improving your mental arithmetic. Along the way you'll also discover who invented numbers, whether animals can count and what nuns have to do with long multiplication.