Add, Subtract, Multiply and Divide.
- Youtube: http://www.youtube.com/watch?v=psY_o-DkLTo
- Competition: Want to know if you are the best in the world doing basic math operations? This is your application.
- Train yourself: you can train yourself and strengthen your brain daily.
- The application has thousands of different questions.
- The application is best viewed on a screen Retina.