CalcuDoku (also known as kenken or K-Doku) is a mathematical puzzle game similar to Sudoku. The aim is to fill the squares with numbers so that a number isn't repeated in a row/column. The grids also feature a subdivision which much be filled in a manner to produce the same number using any mathematical operation. You can play this program online or in your desktop. The PC version also allows you to create a booklet of puzzles for printing.
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