■ How to play
・ There is a time limit of 5 seconds for each question, so answer within the time limit.
・ If you answer correctly, you can earn points.
・ The rank is displayed according to the number of correct answers. Let's do our best and aim for the perfect S rank!
・ If you want to quit the quiz game on the way, tap "Back".
・ By activating the brain, it is also recommended for improving concentration and preventing dementia.
・ The quiz can be played offline.
・ The price of this game is free and there is no in-game charge.

■ Calculation to be asked
・ Addition
・ Subtraction
・ Problems will be added at any time

Activate your brain in a short amount of time.