1, 4, 5: The Caucasus isn't in Europe according to Jetpunk, but some count it.
2: Africa.
3: Asia.
6: South America.
7: Asia.
8: Asia.
9: Europe!
10: Asia.
11: Asia.
12: Asia
13: By some definitions, a small amount of this country is in Europe.
14: Asia
15: Asia
16: Asia
All in all, 1 unambiguous European place and 4 arguably European places. This is not even accounting for the fact that at least a few of these flags (3, 6, 15) and arguably a half dozen (1, 10, 11 also) are not countries but parts of countries.
2: Africa.
3: Asia.
6: South America.
7: Asia.
8: Asia.
9: Europe!
10: Asia.
11: Asia.
12: Asia
13: By some definitions, a small amount of this country is in Europe.
14: Asia
15: Asia
16: Asia
All in all, 1 unambiguous European place and 4 arguably European places. This is not even accounting for the fact that at least a few of these flags (3, 6, 15) and arguably a half dozen (1, 10, 11 also) are not countries but parts of countries.
Please change the title of this quiz.