★★★★★
This application provides exercises covering basic mathematical skills like:
- Addition,
- Subtraction,
- Multiplication,
- Division.

Several levels of difficulty are present (easy, medium, hard).
You can choose to do a test comprising between 5 and 20 operations. At the end of the test you have summary with your results. You win three stars when you find the solution at the first try, when you make a error, you lose a star. After three star lost, you go to the next operation.