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