Let's Go Math! app for iPhone and iPad

Lets go Math is the latest and greatest math game with tons of fun and challenging equations! It includes all your favourite math signs such as addition, subtraction, multiplication and division to work out your brain! If you get 5 questions correct on the first 2 levels, then you move on to level 3 where you have to answer 3 correct and then 2 correct on level 4. After you complete all of those, you win! But... if you get 3 incorrect while playing, you lose and have to start over from the beginning.