Ok, so technically Sudoku is more of a numbers game than a math game. The idea behind sudoku is that no two columns, rows or squares can have the same number twice. There are 9 columns, 9 rows, and 9 squares all with 9 cells in them. Each of the columns, rows and squares have to have all numbers 1-9 and no duplicates. Some of the rows start already filled in. If you are familiar with sudoku, give this game a quick try. There are unlimited puzzles you can solve here.