This app aims to effectively activate the frontal lobe.

Activating the frontal lobe is better than spending time on difficult problems.
It is said that it is more effective to solve simple problems as quickly as possible.

In this app, you will be asked a lot of simple calculation problems using four arithmetic operations.
In order not to hinder the user's response speed, we do not input or match answers.
It's okay if you make a mistake in your calculations.
It is important to calculate as fast as possible.

Aim for 10 to 15 minutes a day.
It is more effective if you say your answers out loud.
Reading aloud is also effective for activating the frontal lobe. Please give this app a try and say it out loud.

By doing this before studying, you can also expect to improve your concentration.