Participants from the rest of the world may add 75 points to their result. There are not many people, who know this much about cities. This is still an outstanding result. You have had a look around Europe - at least in the atlas. There is nothing wrong with your knowledge about this matter.
Most people know three, four cities in the major countries.
If you think that this is too easy, you might set a timer. A total of five minutes, for all three of the chosen countries is quite tough.