Battle with arithmetic cards

The appendix gives an opportunity to improve their skills in the field of arithmetic. With this program you can compete between two players at the same time.
When the program is running, the tasks are shown to both participants. You need to select the correct answer from the options as quickly as possible.
The program has the ability to make settings:
- range of numbers for examples,
- the number of tasks.
At the end of all the tasks, the result of your achievements is displayed.