How to play - For each question, enter the numbers to answer - After entering, you can click to delete and re-enter another number - Correct answer your will get points, incorrect answer, you will not be penalized - The more difficult the question, the higher the score - If the question is too difficult for you, click "Next" to go to another question - You have 2 minutes (120 seconds) for each turn game - Can click to re play current turn game - There are 5 skill levels, based on the points you gain, try to get lots of points Feature - Free to play, good training your brain - Easy to play, Simplest game system, Designed for one handheld game play - Off-line (without internet connection) game play supported - Tablet device supported - Achievement & leader board supported Home page: https://play.google.com/store/apps/developer?id=HuyenTrangBk Facebook: https://www.facebook.com/Math-quizer-1446475968820507/ YouTube : https://www.youtube.com/watch?v=8hb8z0sFPxk