Logic, math, and fun come all wrapped up in one tricky puzzle package. Each little story gives you just enough information to determine what's bigger, who weigh

Try any of these 150 word, number, and logic puzzles, and you'll encounter some surprising new ways to analyze, observe, and decide. You've been warned, so don'

Part of a fun range of pocket-sized puzzle books for adults. Designed to test your powers of deduction, determination and diligence, the cryptic codes, conundru

What a bargain! At more than 700 puzzle-packed pages, this huge, value-priced collection should keep any solver happy...and busy for a very long time. It contai

'IQ Challenge' is a mindbending, entertaining and sometimes baffling test of your mental powers. Arranged in levels of ascending difficulty, the puzzles pose a