Flags of the Countries of Central America

Name all 50 states in the USA. Easy, right?

Can you name all the countries that have ever been members of OPEC, the Organization of Petroleum Exporting Countries?

In 90 seconds, make every country disappear from the map by typing both its first 2 letters and its last 2 letters.

Click state capitals. Click nothing but state capitals. Clicking any other city will instantly end the quiz!