1. Which city is the world's least populous national capital of a sovereign state?

2. Approximately how many living languages are spoken in Papua New Guinea?

3. Why was the capital of Guatemala moved to its current location in Guatemala City in 1776?

4. What unique transformation did Tirana's architecture undergo in the early 2000s?

5. What was the ancient Greek name for the city of Amman?

6. Singapore is one of the three remaining modern city-states; which of these is another?

7. Which major river flows through the capital city of Vientiane and forms a border with Thailand?

8. Ecuador's capital, Quito, is famous for its proximity to which geographical line?

9. The urban plan of Brasília is famously shaped like which of the following when viewed from above?

10. Why is Warsaw often referred to as the 'Phoenix City'?

11. What are the administrative districts of Paris called?

12. What natural disaster in 1755 led to the complete redesign of Lisbon's city center?

13. How many 'Captains Regent' serve as joint heads of state in San Marino at any given time?

14. Tonga is the only nation in the South Pacific to maintain which form of government continuously?

15. Which famous author of 'Treasure Island' lived his final years and is buried in Apia?

16. Before independence, Vanuatu was an Anglo-French Condominium known by what name?

17. Which river flows through the center of Seoul and was the namesake of South Korea's rapid economic rise?

18. Damascus is historically famous for the production of which high-quality metal used in sword making?

19. By what ancient Greek name was the city of Amman known during the Hellenistic period?

20. Ashgabat holds a world record for the highest density of buildings made from which material?