You can study national flag with location and capital.
Since also saved accuracy rate of each country, while they check the weak parts,You can learn efficiently.

- Degree of difficulty
There is a normal and hard.
Normal will see the national flag and country.
Hard it will be displayed only national flag.

- Clear
Quiz will end when the mistake.
If the answer to not make a mistake until the last, it can be cleared,
It attaches characters clear in the area selection button.