The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Udo Thiel:
Take your math skills to the next level!Mental Math Competition is a fun way to practice mental math and compete with your friends or others through Game Center, Apple's free gaming platform. Practice mental math in many different ways:- In Easy Mode, solve ten equations without any time limits- In Hard Mode, solve as many equations as possible until time runs out. Compare your results with others on the high score tables- In Multi-Player Mode, compete in real-time against up to 3 friends or random opponents.Each mode has four levels of difficulty with increasing range of numbers, mathematical operations and placement of the unknown variable.The game also offers an offline mode, where all high scores and other player achievements are stored locally and which doesn't require an Apple ID.