n nCalcudoku (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 youre dealing with +, -, x and .n nThis Logic Puzzles book is packed with the following features: n n- 500 Calcudoku (9x9) Puzzles from Easy to Hard.n n- Answers to every puzzle are provided.n n- Each puzzle is guaranteed to have only one solution.n n- Includes free bonus puzzles you can download book (Tons of Sudoku Puzzles for Adults & Seniors) n- Includes free bonus puzzles you can download book (Word Search With Hidden Message: 102 Puzzles for Adults and Seniors)