轨道交通标志色大赏——天津篇

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

When you guess a country, all the countries it borders will also be completed. Can you fill in the world map in just 90 seconds?

Drag the flag onto the correct state. Careful, though! One wrong move and the game ends.

Among these first names, click the ones where the average person in the U.S. with that name is at least 50 years old.