Math Operations Puzzle

A great game for those who love math, or for those who would like to practice their logic thinking.
The rules are very simple:
- Find the numbers from 1 to 9 that gives the right solution. Each number can be used once.
- The order of the operations is the order of their appearance. (Eg. 4-2x5=10 means (4-2)x5=10 )
- When you are done, press the check button

There are 3 different difficulties:
- Easy: 1D
- Medium: 2D
- Hard: 3D