George J. Summers

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The Great Book of Mind Teasers and Puzzles
Summers, George J.

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� 2.96

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Logical Deduction Puzzles (Official Mensa Puzzle Book S.)
Summers, George J.

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� 3.82

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Brain Teasers: Pocket Puzzlers
Gardner, Martin; Etc.; Et Al

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� 4.75

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Test Your Logic: Fifty Puzzles in Deductive Reasoning (Dover Recreational Math)
Summers, George J.

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� 4.46

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New Puzzles In Logical Deduction
J, Summers George

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� 4.74

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Logic Puzzles
J. J. Mendoza Fernandez; George J. Summers; Norman D. Willis

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� 3.48

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Juegos de ingenio 2

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� 3.44

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Mind Bafflers
Summers, George J.

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� 5.18

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