1) Player 1 chooses a box and calculates the correct answer. (Player 2 must also solve the problem and agree with Player 1.)
2) If the answer is correct, Player 1 places and X or an O in that box.
3) Repeat the directions for Player 2.
4) The first player to fill in five boxes in a row wins the game. (The boxes may be filled vertically, horizontally, or diagonally.)