Most effective absolutely free Hardest Math Sudoku Game. Hardest Math Sudoku is really a Hardest Math version from the really famous number game Sudoku. Just like in all Sudoku games our objective will be to fill each and every row and column of three X three block with all digits from 1 to 9. The squares with numbers currently written in them can’t be changed. So that you can spot a digit within a cell we've to click it using the mouse left button to show the digit picker, then we've to click on the desired digit and it is going to be placed in that cell.