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Calcudoku (also known as "Mathdoku") is a mathematical and logical puzzle loosely similar to Sudoku. Series The Mini Book of Logic Puzzles Calcudoku. - Each bold-outlined group of cells (block) contains digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication (×), and division (÷).
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.