You have to name all the countries that are South American
Countries north of Panama and the Carribean will be counted North American
Countries that own places in the continent or islands around it will have to be mentioned. If, for example, Spain owned some land called Spain Jr., you write Spain, Spain Jr..
the 1st answer will be the biggest South American country, the 12th answer the smallest and after that overseas territories
I know that it has been done before, in my opinion many quizzes have probably been repeated. I don't check intensively to see if it's been done because with my quizzes, I would like to cover certain subjects such as continents, countries, bodies of water, etc...
Nonetheless, thanks for telling me about it.