Similar to round two on Mastermind but without the big black chair, this week's Friday brain-teaser from xrefer explores the part of your brain other quizzes fail to reach. Have a crack, then see how you did by checking the answers

1. Is the Sun a planet or a star?
2. Which state of the USA is known as the Empire State?
3. Where in the human body is the cornea?
4. Which police inspector has been played in films by Peter Sellers and Alan Arkin?
5. What is usually made or kept in a samovar?
6. Andorra lies between which two countries?
7. Which nuts are used to make marzipan?
8. Who wrote the 1954 novel "Lord of the Flies" about a group of boys marooned on an island?
9. In which country are the cities of Izmir and Bursa?
10. If the pronunciation of words is represented by the "IPA", what is this abbreviation short for?