From GameBrew - a wiki dedicated to Video Game Homebrew.
MathOp is a math game in which you must solve 20 basic operations (x, +, -) as soon as possible.
At the end of the countdown, the first operation is presented and the game is launched.
You must return the result using the touch screen, and confirm with "OK".
If it turns out that you make a typo, press the "CLEAR" to clear your result.
A penalty of 5 seconds is given for any false result validated.