Super conundrum! National flag quiz appeared. It is a quiz app of "flag de quiz".
I am raising a problem that cannot be solved without knowing the origin of the country.
Here is the history of national flags that you don't know yet.
From simple problems to maniac problems,
What questions can you ask? Aim to get all the questions correct.
It is an unofficial app.

[Recommended for such people]
・ Fans of "national flag"
・ Those who want to know more about "national flag"
・ Those who are confident in their knowledge of "national flags"
・ Those who want to have fun in their spare time
・ Those who want to play a quiz app
・ Those who want conversation topics