NumberOne Brain is one of the best brain teaser game for iPhone. You are given a number and you have to find out it as fast as possible. The batter you find it, the harder game will be for you. But when you miss number you will lose second. As you keep giving correct ones, you will get time bonus. Get second extra every 5 correct and 5 seconds extra every 10. You can make competition with your friends via Game-center leader-board. Share your scores with your friends on Twitter & Facebook. There are the Hardmode with a x70 combo in Normal Mode to unlock and also get three new modes. Experience great new background music for Chaos Modes. You can tap over the any mode if you can't unlock it.