मार्टिन गार्डनर

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Popularity Prediction Title

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Nuevos pasatiempos matemáticos

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Ongelmatarinoita

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On the wild side

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Order and surprise

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Penrose tiles to trapdoor ciphers

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Perplexing puzzles and tantalizing teasers

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Pocket Puzzlers: Brain Teasers

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Puzzles from Other Worlds

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Puzzling questions about the solar system

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