Category | Price | Seller | Device |
---|---|---|---|
Education | Free | Takeya Kanazu | iPhone, iPad, iPod |
These problems are divided into three levels.
In Japan, a 12-year-old child is tackling such a problem.
Level A (Easy) Q1〜6
Level B (Medium) Q1〜10
Level C (Hard) Q1〜6
Let's do it!