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World Largest Agglomerations
DirectionsFirst choose the number of cities by typing ‘100’, ‘250’, or ‘all’ – then try to achieve the highest population among 1M+ world agglomerations. Quiz is not timed.
Quiz Takers 
Hey Darren, mind adding the source for this one? Doesn’t seem to be Demographia’s World Urban Areas list this time.
I think I misspelled your name lol, forgive me.
citypopulation.de
Thanks!! Do you still use the Demographia list in any of the quizzes? Or am I just confused, ha?
citypopulation.de is my only source for population numbers