ルイザ・グロス・ホロウィッツ賞を受賞した日本人

How many countries do you know? In this quiz, you've got 15:00 to name as many as you can. Go!

Guess the world's twenty most-traded currencies, and the countries or special regions that issue them.

15 random U.S. States have been shaded on a map. Can you name them all?

Drag the pin onto the correct country. Careful, though! Three wrong moves and the game ends.