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The objective of Mathdoku is to fill a grid with numbers, from 1 to 4 for a 4x4 grid, from 1 to 5 for a 5x5 grid, and so on, so that no number appears more than once in any row or column. In addition, Mathdoku grids are divided into heavily outlined groups of cells, and the numbers in the cells of each cage must produce a certain "target" number when combined using a specified mathematical operation (either addition, subtraction, multiplication, or division). Another way to explain Mathdoku is to say that it is a combination of Sudoku and math. Like Sudoku, Mathdoku requires players to fill a grid with numbers so that no number appears more than once in any row or column. However, Mathdoku also requires players to use math to combine the numbers in each cage to produce a specific target number.
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