National flag quiz

It is the quiz which looks at the national flag and applies the name of a country. Since a problem is set from 193 nations of U.N. members, other countries, and 204 nations in all of areas, please challenge [ how many questions can answer and ]. Please apply the capital of the country out of four choices based on the national flag displayed on a screen. The point is given according to the number of correct answers. It can compete for a total point in the user and net ranking in the world. [Recent Changes] Time limit add.