. "Shu xue you le yuan zhi shen ji miao suan" . . "Electronic books"@en . "數學遊樂園之神機妙算" . . . . . . . "131 puzzles to challenge people of all ages." . . . "神機妙算" . . . . . "Mathematical Cavalcade"@en . . . "Mathematical cavalcade" . "Mathematical cavalcade"@en . . . "Mathematical Cavalcade contains a further 131 puzzles to challenge people of all ages."@en . . "Shen ji miao suan" . . . . . "MATHEMATICS Recreations & Games." . . . . "GAMES Sudoku." . . "Shu xue you xi." . . "數學遊戲" . "Jeux mathématiques." . . "Szórakoztató matematika." . . "Matematikai játék." . .