What. I searched through all the quizzes I could find to see if someone made this quiz before and I didn't find any. Well thanks for thinking my quiz is nice instead of saying "Sorry, delete this quiz, I have already made it!" :)
Woah, this is good. Can you provide a source for the data though? It would be my pleasure to create an extreme version (with your permission, of course). Good idea!
My source was mainly my brain. Just kidding. My source was for the ones with a lot of population I just used "Biggest Cities in Europe Quiz - Extreme" Although if you want to make an extreme version than I guess you need a different source. Perhaps just looking up on Google/whatever source engine you use "Biggest Cities in X" X is for every country in Europe. Although for a lot you could just search up the biggest cities in X on JetPunk to get more of an urban area population. Or you could use citypopulation.de Idk.