You have to solve the math problems within 20 seconds to score points. The problem is randomly generated so you have to be quick and careful.
Every time you score a point, the timer is reduced by 1 second, capped at 10 seconds.
https://play.google.com/store/apps/details?id=com.OWCA.FruitMath
Hope you guys will enjoy it! Please rate, G+ and review my app. I will do the same for you!