Check out this Brain Trainer game : MagicMath I found it really addictive, and the way you are playing with math it's really fun. It's easy to use and the design is just great. It actually motivates you to try harder to beat your highscore and makes you a really fast thinker. Very cool concept with different levels. Really addictive and challenging game! I do love it! Watch this cool video : https://www.youtube.com/watch?v=QzF_h_7ZDbY Did I mention that you also earn bonus stuff? Oh yes!!! It will help you! Nice game! You should give it a try!