Guess the countries which contain the world's most populated metro areas. You are not allowed to guess the city...rather when you type the country in the city will appear.
I gets a bit frustrating when every quizmaker seems to have a different source for the metro areas. For the first I assumed it'd be China/Guangzhou, at the second box I tried China, Mexico, Indonesia, India and gave up.
Yeah, I don't want to go to Wikipedia first to see which list of metro areas you had in mind. Quizmaster has pretty much taught us to trust his numbers, from citypopulation.de, which are much more up to date anyway.