Interesting quiz. I got everything in the first column except for Budapest- but upon reflection I remember reading something about their early metro system now. I got everything in the 2nd column except for Hamburg and Buenos Aires. and in the 3rd column I missed Cleveland, Nagoya, Montreal and Tblisi. A bit surprised about Tblisi... only the 4th city in the Soviet Union to get a metro system and they picked Tblisi? hm, okay..
Took it again.. got Budapest, Hamburg and Buenos Aires this time, but missed Glasgow. And in column 3 I missed the same 4 as I did the first time around.