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This collection of puzzles will sharpen your mind, help you build powers of spatial and numerical intelligence and discover the elegance of geometrical logic. Each of these remarkable puzzle books examines and scores your brain's performance with a themed puzzle challenge. Each title is an enjoyable two-stage mental workout. As you complete the puzzles and challenges in The First Test, you can use the scoring system to measure your ability for that theme. The answers to The First Test questions contain hints, tips and ...

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