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There are two kinds of people in the world: those who love puzzles and those who can't stand them. Intricate problems can challenge but also disturb intelligence. Fixx introduces you to this fascinating and controversial minefield by explaining first what is intelligence in the strict sense. You will be delighted with a group of puzzles of various kinds -mathematical, verbal, logical- that will test your mind and your patience. But Fixx will a...

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This book has been the most popular and the best selling running book of all time.

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This volume features thoughtful riddles paired with engaging illustrations that reveal and explain the answer.

This is a book of games and puzzles inspired on intelligence tests, which main challenge is to get the highest number of points. Written with professionalism and humor, the tests and games collected are fun and accessible to every lover of riddles.