- Download the recent version of the APK file from GitHub.
- Install the APK file on your Android smart phone or tablet. You should allow the installation of third party apps.
- Input your answer to the edit box, and push the 'Submit' button. You will see 'Correct' or 'Answer is' with the correct answer. Note that, in all division problem, the answer should be an integer floored from the fraction.
- Click the 'Next' button to move forward to the next problem.
- The total score increases whenever you input the correct answer while the total score decreases when a wrong answer was submitted.
- Click 'Clear' to restart the game. Both score and count are initialized.
- Level 1 (Easy) : The numbers are limited from 2 to 9.
- Level 2 (Medium) : The numbers are limited from 2 to 20.
- Level 3 (Advanced) : The numbers are limited from 2 to 99.
- Random : The operations are assigned randomly.
- Addition : only addition.
- Subtraction : only subtraction.
- Multiplication : only multiplication.
- Division : only division.