Calcudoku: 200 Hard Puzzles 9x9 vol. 19 (Paperback) (ISBN-13: 9798648199361)

Calcudoku (also known as "Mathdoku") is a mathematical and logicalpuzzle loosely similar to Sudoku.
The objective is to fill the grid in with the digits 1 through N (where N isthe 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 whichachieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication ( ), and division (

Author: Yurii Naidonov
ISBN-10: 8648199360
ISBN-13: 9798648199361
Publisher: Independently Published
Language: English
Published: 06/14/2020
Pages: 138
Format: Paperback
Weight: 0.43lbs
Size: 9.02h x 5.98w x 0.30d