Extremely simple.
Extremely addictive.
Train your mind with basic sums of a digit in a time limit.
You will betray breves.

You have three game modes:
- Normal: you have 1.5 seconds to calculate operations .
- Bonus time: in this way you have 2.5 seconds. The remaining time will accumulate to the next operation . No time limit, you are the limit.
- 60: you have 60 seconds to calculate the maximum number of operations.

Challenge your friend