Goal: Get three X's in a row (horizontal, vertical, or diagonal) before the computer gets three O's in a row. How to Play: • Each square on the board has a question. • To place an X on a square, you must answer the given question correctly. • The computer will place an O on the board after you place an X.

Easy • Addition • Subtraction • Multiplication • Division • Squares

Medium • Addition • Subtraction • Multiplication • Division • Squares • Cubes

Hard • Addition • Subtraction • Multiplication • Division • Squares • Cubes • Square Roots

Super Brain • Addition • Subtraction • Multiplication • Division • Squares • Cubes • Square Roots • All Operations