Category | Price | Seller | Device |
---|---|---|---|
Education | $0.99 | 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) Q1〜20
Level B (Medium) Q1〜42
Level C (Hard) Q1〜24
Let's do it!