Take a digital locks tester role! All ingame doors are tightly closed but it's not a problem for real professional because you know how to find correct door codes by using special test tools.

Numdoors is a mathematical game. In this game you need to solve various arithmetic tasks, calculate unknown door code parts and open doors of course.

Features
- 100 addition/subtraction/multiplication/division missions
- Rating game. Compete with other players and solve tasks with time restrictions.
- Free to play