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Brain-teasers and brain-twisters to improve the mathematical skills of both children and adults. Includes explanations of the principles behind the solutions.
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Brain-teasers and brain-twisters to improve the mathematical skills of both children and adults. Includes explanations of the principles behind the solutions.
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"Brain-teasers and brain-twisters to improve the mathematical skills of both children and adults. Includes explanations of the principles behind the solutions."
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