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IQ Challenge: Over 500 perplexing number, letter & visual puzzles
IQ Challenge: Over 500 perplexing number, letter & visual puzzles
Arcturus Publishing, Joe Cameron
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IQ Challenge is a fun way of boosting your brainpower. Organized into sections, and comprising a more and more challenging array of puzzles and problems, it will give all aspects of your intelligence a rigorous workout.
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