You have up to 10 seconds to complete each problem. Problems consist of addition, subtraction, and multiplication. Requires Javascript enabled on your browser. Type your answers and the browser will fill them in. Use Delete to erase an answer(do not use Backspace with Firefox browser). To use the number keypad, you must have "Num Lock" on. You must get 100% correct to enter your score in the high score table. Good luck and have fun!