1. Which Nordic country declared its independence from Russia on 6 December 1917, and celebrates it as its national day?

2. The Irish Free State officially came into being on 6 December 1922. What had been signed in London exactly one year earlier, on 6 December 1921?

3. The amendment to the US Constitution that abolished slavery was ratified on 6 December 1865. Which amendment was it?

4. On 6 December 1917, two ships collided in the harbour of a Canadian city, causing the largest man-made explosion before the atomic bomb. Name the city.

5. On 6 December 1884, the Washington Monument was finished when a small pyramid was placed on top. What metal, then rarer than silver, was the pyramid made of?

6. The first edition of the "Encyclopaedia Britannica" began appearing on 6 December 1768. In which city was it published?

7. A jazz pianist born on 6 December 1920 led the quartet that recorded "Take Five", one of the best-selling jazz singles ever. Name the pianist, the band member who actually wrote the piece, and the album it appeared on.

8. Which American lyricist, born on 6 December 1896, wrote the words to songs such as "I Got Rhythm" and "Someone to Watch Over Me", with music by his brother?

9. A German-born photographer born on 6 December 1898 took the famous picture of a sailor kissing a woman in Times Square at the end of the Second World War. Who was he, and for which magazine did he take it?

10. St Nicholas is celebrated on 6 December. In Austria and Bavaria, which horned, devil-like figure accompanies him to frighten naughty children?