To see how fast your brain, come to play this game now!
Once you start to play, you can not stop it!
How to play:
You have only one second to choose the answer.
Tap the white tile if the equation is right. Otherwise, tap the black one.
Reach high score, and share to your friends.
The rule is so easy, but can make you crazy.
+Add a new game mode : Hard Mode.
+Add Game Community and Global Leaderboard.
+Add Red hearts award.