DailyMath!

The Daily Math game mode is a multiple choice timed game consisting of multiplication, division, addition, and subtraction. Each question has a timer, and as the game progresses you are given less time per question. Get the most points by answering correctly and as fast as you can. Lose the game by running out of time or answering incorrectly. Choose from three different modes: Regular, Pro and Extreme.

There are also practice modules for working on specific math skills.