Calcudoku

Calcudoku combines the row and column restraints of Sudoku with bold-lined regions that have numerical constraints. This book contains 70 puzzles at size 6x6, 70 at 7x7 and 60 at 8x8 all sorted in order of increasing logical difficulty. Puzzles contain a mix of addition, subtraction, multiplication and division signs.

Printed on large, top-quality paper ideal for solving on, the 200 Calcudoku puzzles vary in difficulty from easy to hard so whatever your preference or experience you'll always find a puzzle here to suit you.