A free app for Android, by Free VPN LLC.

Sum – Math Challenge is a simple game that lets you test your math skills. It’s all about adding numbers, and the more you add, the more you get. The game is based on the idea that if you are good at adding, then you will also be good at subtracting.

To start, select the number you want to add and press the button “SUM”.

Each time you pass a level, you will get a bonus 30 seconds of extra time. If you want to see what the App Review sites have to say about Sum – Math Challenge, click the button below.

How to play Sum – Math Challenge:

Select the number you want to add.