Math Puzzles and Brainteasers, Grades 6-8 Math Puzzles and Brainteasers, Grades 6-8
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The Pocket Book of Frame Games The Pocket Book of Frame Games
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Math Puzzles and Brainteasers, Grades 3-5 Math Puzzles and Brainteasers, Grades 3-5
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The Big Brain Puzzle Book The Big Brain Puzzle Book
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Challenging Math Problems Challenging Math Problems
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Contemporary Brainteasers Contemporary Brainteasers
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