Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 5x5 (Volume 6)

By Dart Veider and Dmytro Khomiak

Calcudoku (also known as "Mathdoku") is a mathematical and logical puzzle loosely similar to Sudoku.
The objective is to fill the grid in with the digits 1 through N (where N is the number of rows or columns in the grid) such that:
- Each row contains exactly one of each digit.
- Each column contains exactly one of each digit.
- Each bold-outlined group of cells (block) contains digits which achieve the specified result using the specified mathematical operation: addition (+).
- Unlike Killer Sudoku, digits may repeat within a block.

• Format: Paperback
• Language: English
• ISBN: 1696725712
• ISBN13: 9781696725712
• Release Date: September 2019
• Publisher: Independently Published
• Length: 240 Pages
• Weight: 0.72 lbs.
• Dimensions: 0.5" x 6.0" x 9.0"