CalcuDoku 9x9 Deluxe - Hard - Volume 13 - 468 Logic Puzzles

CalcuDoku is a fun and addicting logic puzzle game that combines Sudoku with math. CalcuDoku is a fun way for kids and adults to practice addition, subtraction, multiplication, and division facts. This book is ideal for you if you love to solve difficult CalcuDoku 9x9 puzzles. You do not need to wade through tons of easy CalcuDoku puzzles before getting to the real brain teasers. Once you pick up this book, you won't be able to put it back down. You have been warned CalcuDoku 9x9 Deluxe - Hard is a collection of 468 puzzles: 408 hard CalcuDoku 9x9 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this CalcuDoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books. CalcuDoku is also known as Square Wisdom, CanCan, MinuPlu, Mathdoku and Calcu-Doku.