Problem Solving Through Recreational Mathematics 1970-01-01
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Projective Set (game) 1970-01-01
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Pseudo-polyomino 1970-01-01
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Repdigit 1970-01-01
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Rithmomachia 1970-01-01
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Rope-burning puzzle 1970-01-01
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Simple magic cube 1970-01-01
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Soma cube 1970-01-01
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Str8ts 1970-01-01
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Taking Sudoku Seriously 1970-01-01
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Tangram 1970-01-01
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The Game of Logic 1970-01-01
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The Lady's and Gentleman's Diary 1970-01-01
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The Man Who Counted 1970-01-01
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The spider and the fly problem 1970-01-01
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Toy problem 1970-01-01
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Two-cube calendar 1970-01-01
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Vanishing puzzle 1970-01-01
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Von Neumann's elephant 1970-01-01
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Water pouring puzzle 1970-01-01
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