X's and O's

X's and O's is a modified version of tic-tac-toe game with great mathematical significance. Players need to master arithmetic skills such as addition, subtraction, multiplication, and division. Select a point on the grid and answer the math questions on the grid. If you answer correctly, you can place X or O on the grid. If you answer wrong, you will miss this opportunity. Of course, you can also choose single or double mode.