Probably been done already but I got 9 correct
http://www.cheapflights.co.uk/news/...+to+the+city+quiz&utm_campaign=organic+may+16
http://www.cheapflights.co.uk/news/...+to+the+city+quiz&utm_campaign=organic+may+16
That's what helped me with some of them.I got 11 - there was writing in the language of some of the countries which was a giveaway (and had one guess)