1. What is the world’s longest river?

2. Who discovered penicillin?

3. Which city hosted the 2012 Summer Olympics?

4. What colour are most school buses in the USA?

5. Which continent has the most people?

6. What is the chemical symbol for silver?

7. In which country is the Taj Mahal located?

8. Which planet is closest to the Sun?

9. What animal is the fastest land mammal?

10. Which sport uses a shuttlecock?