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.
See how fast you can answer addition problems. How to play:Answer as many questions as you can before time runs out. Answers can only be 2, 4, 6 or 8. Correct answers earn more time. Wrong answers take away time. Can you answer more than your friends?View your rank against your friends on Facebook. Good Luck!