Extremely easy. Same as the screenshot.
But Extremely addictive.Please dont install this game if you dont like addictive games.
Be warned, once you start playing, you will not be able to stop! This game is very addicting!
Oh, bet you wont get 20!
[How to play]
> Step1. See the mathematics in the game.
> Step2. Think about it!
> Step3. Make judge in one second!!
> Step4. Beat your friends!!!