Test your powers of thinking with over 500 challenging problems and puzzles. Mensa, the international high IQ organization is known as a society for people who pride themselve on their ability to solve problems by the relentless application of intelligence. Logic is king in our world. But there are other kinds of problems that cannot be solved by logic alone, problems that require a few moments of consideration before an answer can be found. Mensa presents a collection of over 500 problems that require either logical deduction or lateral, imaginative thinking to be solved. 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.