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Puzzles and Curious Problems by Henry Dudeney Thomas Nelson Hardcover 1930s | eBay
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Puzzle de Dudeney – GeoGebra
Puzzle de Dudeney – GeoGebra
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a The answer to Dudeney's haberdasher's puzzle. b The solid triangle α... | Download Scientific Diagram
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A Directory of Mechanical Puzzle Designers — Henry Dudeney
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