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Calcudoku (also known as "KenKen", "KenDoku", "Mathdoku", "Square Wisdom") is a logic puzzle with simple rules and challenging solutions. It is similar to Sudoku and Killer Sudoku except you're dealing with +, -, x and ÷.
This Logic Puzzles book is packed with the following features:
- 500 Calcudoku (9x9) Puzzles from Easy to Hard.
- Answers to every puzzle are provided.
- Each puzzle is guaranteed to have only one solution.
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