1. Which author wrote '1984'?

2. Which animal is the fastest land mammal?

3. What is the hardest natural substance?

4. Which metal has the chemical symbol Au?

5. Which author created Sherlock Holmes?

6. Which sport uses the Ryder Cup?

7. Which mammal lays eggs?

8. Which gas is essential for human respiration?

9. What is the name of the longest-running TV sci-fi series?

10. Which instrument has 88 keys?