Some of these are trick questions, like all the ones in southeast Asia, and then others are just obvious, like the South Island. Also, I recommend making this quiz maybe a minute longer.
Great quiz, really appreciate that both Nuuk and Torshavn have been accepted as capitals (both are capitals of Danish territories, Greenland and Faroe Islands, respectively).
Because it's not a country capital, so Reykjavik is the correct answer, but Jerry was lenient here so let you have Nuuk anyway, just didn't show it as the answer
Mentally, I've always imagined Buenos Aires being south of Montevideo. I pulled up Google Maps, turns out Montevideo is almost a straight shot east and just barely stretching farther south.