If there are any mistakes with this quiz, please let me know! They might take a while to rectify, but I will try to get them fixed. I'll do my best to try and overhaul/update the quiz sometime during the Christmas/New Year period.
Awesome work!! Not moaning I hope but couple of queries... shouldn't Canada be Toronto and Tanzania be Dar es Salaam? Not capitals, and thought they were the biggest cities. Unless it's a city proper/metro area thing. Anyway, great quiz :)
Belmopan is the capital of Belize. Largest city would be Belize City. As others have said, Dar and Toronto should be the answers for their respective countries. Rangoon changed its name to Yangon in the 90s. You also seem to be inconsistent with your use of metro/urban area vs city proper; Espoo is considered part of the Helsinki metro area, and the answer for Finland should be either Turku or Oulu, not sure which (if you are not using city proper, that is), while Guangzhou is only the largest in China using urban area, otherwise it would be Shanghai.
According to me, everyone else, the source you used, every other source you could possibly use, and basic knowledge, Toronto is more populous than Montreal.
Some minor things, the dot of Dar es Salam does not change colour, I'd suggest changing the box colour for Vatican and Singapore to grey so it becomes more obvious you don't expect an answer and maybe Cotonou for Benin is debatable. Even though Porto-Novo is named capital the parliament is in Cotonou and both are accepted answers in most of the capital cities quizzes on Jetpunk.
It's a good quiz, although there are inconsistencies in the way the population is counted (most use city proper population metrics while a number of cities like Katowice use large urban area figures).
Lubumbashi is misspelled. That said, I didn't realize it was the biggest city in DRC outside of Kinshasa. Learned some things today.
But great quiz!
kandahar the biggest noncapital city in afghanistan
quezon city is the biggest city in philipines
colon is the biggest noncapital city in panama
and nonthaburi is the biggest noncapital in thailand
also kwajalein is an atoll NOT a city. ebeye is the biggest noncapital city in marshall islands
same with kiribati. betio is the largest noncapital city in kiribati
bisee is the largest noncapital city in saint lucia
montago bay is the largest nc city in jamaica
addu city and kulhudhuffhushi city are bigger than fuvahmulah (maldives)