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Logik / Mengenlehre

A Philosophical and Cognitive Analysis

In Honor of Professor Chong Chitat on His 60th Birthday

"The Mathematical Recreations of Lewis Carroll for Childs"

500 Hard Sudoku Puzzles Overlapping into 100 Samurai Style

500 Medium to Very Hard

500 Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, Sudoku X, Masyu, Jigsaw Sudoku, Minesweeper,..

500 Medium Jigsaw Sudoku Puzzles Overlapping into 100 Samurai Style

500 Easy to Hard

500 Easy to Hard Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, Sudoku X, Masyu, Jigsaw Sudoku,..

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