Once you press the start button, a random number in the range of zero to fourty shows up in the right of the screen. At the same time, 12 numbers covering the range of 1 - 9 populate the calculator buttons in a random order. The stop watch is running and it is now up to you to perform simple arithemic calculations in order to get the random target number as a result.
However, the subsequent constraints apply:
In case you get stuck you can always press the red SKIP button while the game is running. You then get a fresh random set of numbered fields. However, a time penalty of 3 seconds will take effect.
Once you complete a calculation, one of the checkmarks turns green. You need to solve 5 calculations in total in order to complete the game. Your goal import is to complete the game as fast as possible.