Do you want to become a master of common sense?
Try this app ~
If you invest 15 minutes every day, you will be a master of common sense.

[ Characteristic ]
1. More than 5700 vast amounts of data
2. Resize the board [Zoom]
3. Learning record [Unlocking / checking wrong answer]
4. Effect sound ON / OFF
5. Unlimited Heart Charge without paid download or app download

The steps are not predefined, but when you start a new lesson, a problem is created based on the game creation priority (random, wrong problem first, unexplained first)