For daring puzzlers--a book of mind-bending conundrums handpicked by the pied piper of popular math

Long before Sudoku swept the world, the Victorians puzzled over relationships (If two men each marry the other's widowed mother, what is the relationship between their sons?), and the ancient Chinese favored counting challenges (If a cock costs 5 pieces, a hen 4 pieces, and a chick 1/4 of a piece, how can you buy 100 total cocks, hens, and chicks with 100 pieces?). Some people may claim to "hate math"--but history is proof that everybody loves a good puzzle

From Alex Bellos, math writer extraordinaire and official puzzler to the Guardian, this is the ultimate compendium of math and logic brainteasers--packed with 125 questions, fun trivia, and (naturally ) answers in the back. Can you solve his problems?