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

Name the 20 cities ranked as the world's top financial centers according to the Global Financial Centres Index.

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

Click the flags of countries that lie entirely on islands. But don't click any mainland countries or your experience will end abruptly.