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It's a scientific fact: mental fitness demands at least 20 minutes of hard exercise daily. Puzzles provide the perfect way to give the brain a rigorous workout. A wonderfully intriguing collection of over a thousand specially commissioned riddles, mysteries and verbal conundrums, the "Book of Puzzles & Brain Teasers" is guaranteed to build analytical, creative and practical thinking power while beating boredom. A spiral-bound book designed to lie flat for easy use, complete with a felt-tip pen and four wipe-clean acetate ...

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