I see only 9 (counting Nuuk and Salt Lake which are disputable). Sao Tome and Principe is the country, the question about Chad involves a capital, but that would still be less than half...
'The biggest little city in the world'???? Seems a very bloated claim! Why? A lot of other little cities seem far more globally important than that one.
It's a common nickname for the place. Nicknames don't have to be literally true. You think Paris, the City of Light, is literally the brightest city in the world? I'm not American, I knew it. And now you do too. Not such a bad thing.
It's a city in Nevada, in the United States. The clue is its nickname, basically implying it is a much more bustling and exciting place than its relatively small population would make you think.
Somehow, the left side of the quiz was much easier than the right one. And that isn't just me: The five least guessed answers are all from questions on the right side!
The same goes for Ohio.
I'm not from the US but I've definitely heard Reno mentioned quite a lot, kinda like a mini-Las Vegas is my impression.