I'm afraid that this quiz is flawed because it is easy to think up alternative answers or explanations. For example, 1 could be Portugal because all the others were responsible for major exploration before 1400. 3 could be Taiwan because the others were all colonised by Britain. 4 could be Gabon because it is majority Christian. 5 could be Switzerland because it is landlocked. 6 could be Indonesia because it was not colonised by Spain. 10 could be Istanbul because it is transcontinental.