Math - beat the bar

Getting bored ? Let's have some mental exercise.. How to play? Rules are quite simple. All you have to do is stop the math bar from reaching it's point 0 by answering math problems as fast as you can. Also remember game gets over when you give more than 4 wrong answers. Levels Level 1 : Warming up Level 2: A little more (Unlocks at the score of 10) Level 3: Bar says time to speed up (Unlocks at the score of 20) Level 4: Bar is on fire (Unlocks at the score of 35) Level 5: Mr. Genius (Unlocks at the score of 50) Higher the level, Higher the difficulty. Math is fun, isn't it !!!