Develop your Number Sense with this collection of number and math games. Exercise your mind! This app comes with the following four games:

Countdown: Tap all the tiles in order, from high to low. Compare your speed against other players around the world.

Add 'em up: Pick two numbers that add up to the target number. You are scored based on your longest streak and the time it takes to complete 10 in a row.

Prime Factors: Pick two prime numbers that multiply to the target number. Like Add 'em up, you are scored on streaks and time.

Solve for X: Figure out the solution to algebraic (linear and quadratic) equations.

High score and achievement lists are handled through OpenFeint.

Your feedback is most welcome, and please remember to rate the app, especially if you enjoy it! New games will be added from time to time. Under consideration: Calculus Derivatives (pick the correct derivation), Powers (x ^ y = n). Your votes will pick the next game added.

This is the ad-supported version of the app. The ad-free version can be found by searching for "Number Sense". The ad-free version will be the first to get substantial update, such as the new Time Limit mode.