Creator of puzzles - Big Book Calcudoku 480 Hard Puzzles (Volume 4) (Paperback) (ISBN-13: 9781729653470)

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 (+), subtraction (-), multiplication (×), and division ( ).
- Unlike Killer Sudoku, digits may repeat within a block.

Author: Veronika Localy
ISBN-10: 1729653472
ISBN-13: 9781729653470
Publisher: Createspace Independent Publishing Platform
Language: English
Published: 11/03/2018
Pages: 118
Format: Paperback
Weight: 0.37lbs
Size: 9.02h x 5.98w x 0.25d