Not just a game
This isnt just a game, its a great way to improve arithmatic for anyone of any age. The levels can be adjusted, the timers can be set to different intervals, and you can choose different types of arithmatics to be tested on. It also provides some educational information such as handy multiplication table and such so its a great reference for any school kid or someone who hasnt been doing arithmatic for too too long.
Qattera about
Mental Math - Arithmetic Quiz