In this game you have to perform simple mathematical operations are addition, subtraction, multiplication and division. At first glance they seem to be really simple. But the decision is given 4 seconds.
Score for the decision depends on the time remaining. For example, if the remaining 2 seconds, then you get 2 points.
Depending on the complexity of the game in the examples meet different mathematical operations.
Try to score at least 100 points!