MathDoku is a puzzle game similar to Sudoku. Fill the grid with numbers similar to how you would in a Sudoku puzzle, with each number only being used once per row and column. Groups of cells are outlined as segments, and numbers in the cells within a segment must coordinate with the number and operator. For example, 4+ means all cells within the segment must add up to 4. 2- means the difference between the cells equals 2. 6x means the multiplication of the cells equals 6 and 2/ means the cells must divide and equal 2. There is a built in calculator to help with the math. Puzzles range from 3x3 to 9x9. Play random puzzles, or the daily puzzle every day.