Mostly missed Chinese cities and some American cities.
Xi'an and Xiamen are also kinda embarrassing for me because they're usually some of the first Chinese cities I think of.
...but one of them was Beijing?!?
This is my point: the quiz would be more like: "do you know all the big cities of US/India/Pakistan/China/whatever" rather than "do you know, if there are exactly 18 or 19 of their cities in the top200 and can you count, if you already typed in all"?
Interested in your opinion.
"Administratively, Suzhou is a prefecture-level city with a population of 4.33 million in its city proper, and a total resident population (as of 2013) of 10.58 million in its administrative area" (Wikipedia)
. You havent used urban area as you stat, cause even going by urban it is "only" about 1,2 million and smaller than amsterdam at about 1,4/ 1.5.
I am not sure where the problem lies, with the quizzes or the sourcesite. But many quizzes claim to list urban, while they list metro or just a random conglomeration of cities just because they are in the same general region (side of the country..) but might be 50 miles apart and don't have much to do with eachother (beside being in the same country).
3,6m is the entire population of the provence of Zuid-Holland in which Rotterdam is located.