A number of these have multiple "odd ones out," so the question becomes vague. #2, (Fiji) all other countries begin with J. #4, (Egypt) all other countries were once part of the USSR. #5, (France) all other countries are completely surrounded by another country. #9, (Vietnam) all other countries begin with Ch. #11, (Poland) all other countries are located in Asia. #13, (Brazil) all other countries are in Europe.
I apologise for this. My first odd one out received quite a few players and remains to this day as one of my most popular quizzes. I create these so that you have something challenging to do and if you don’t like that, then feel free to go do one of my other quizzes.