My Best Mathematical and Logic Puzzles My Best Mathematical and Logic Puzzles
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Calculus Made Easy Calculus Made Easy
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Codes, Ciphers and Secret Writing Codes, Ciphers and Secret Writing
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Relativity Simply Explained Relativity Simply Explained
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Fads and Fallacies in the Name of Science Fads and Fallacies in the Name of Science
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Mathematics, Magic and Mystery Mathematics, Magic and Mystery
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