Train your brain, solve your equations!
There is the equation you need to substitute the numbers on the screen to make them disappear in each level. If it is possible to remove all the numbers — the level is passed.
Can you pass the all 20 levels? Good luck!
In the full version:
Removed the advertising, we have increased the reward for completing the level, there is a possibility to skip levels.
In version 188.8.131.52:
+ The number of levels increased to 23.
+ The levels have the opportunity to use a bonus that adds 20 seconds.
+ Fixed several bugs.
- Game may not working in WP 8.1.