Mensa High IQ: Lateral Thinking Logical DeductionTest your powers of thinking with over 500 challenging problems and puzzles. "Mensa" presents a collection of problems that require either logical deduction or lateral, imaginative thinking to solve. To help you, the sections are divided so that you know what kind of thinking process is required. To hinder you, "Mensa" has come up with the most varied collection of problems, puzzles and conundrums you could wish for. Mensa, the international high IQ