Stimulating and delightful, this collection of puzzles features original and classic brainteasers. The author, a puzzle columnist forLe Monde, specially selecte

Follow the hour hand and minute hand of a clock for 24 hours. How many times do they form a right angle? Timothy's house has several rooms, each of which has an

Lucid, instructive, and full of surprises, this book examines how simple mathematical analysis can throw unexpected light on games of every type, from poker to

Our UK Commonwealth Editions have been reexamined to see how they align with UK education standards. Kumon offers four titles that support the Early Years Learn

Challenge yourself with over 100 fresh paradoxes, puzzles, riddles, conundrums, word and number games for the jaded, skeptical puzzlist. Over 100 pages of compr