Countries without the letter A

How many countries do you know? In this quiz, you've got 15:00 to name as many as you can. Go!

Name the twenty countries whose residents have the lowest median age.

Can you name the 26 nations that have at least one urban area with 10,000,000 or more inhabitants? The '#' column is the number of megacities.

Select the countries which are larger than Texas. Selecting any countries smaller than Texas will end the quiz.