123+

You have just 3 seconds to sum the number on the screen with the preceeding value (starting from 0).

Choose the right answer from the ones at the bottom of the screen and if you select the wrong one, then the next choice will become even harder because you will have to remember the last two operations in order to find out the anser.

123+ is a brain trainer. You can enjoy keeping fresh your mind by training your basic math skills with simple operations to be done under pressure!

Share your record with your friends and show them that you are the best!