1. I have keys but no locks. I have space but no room. You can enter, but you can't go outside. What am I?
Answer: A keyboard.
2. You see a boat filled with people. It did not sink, but there is not a single person there. Why?
Answer: All the people are married.
3. You measure my life in hours and I serve you by expiring. I'm quick when I'm thin and slow when I'm fat. The wind is my enemy. What am I?
Answer: A candle.
4. I am always hungry, the more you feed me the more I grow, but when I'm thirsty, I get smaller. What am I?
Answer: A fire.
5. I have branches, but no fruit, trunk or leaves. What am I?
Answer: A bank.
6. What is always in front of you but you can't see it?
Answer: The future.
7. What has a head and a tail but no body?
Answer: A coin.
8. What is so fragile that saying its name breaks it?
Answer: Silence.
9. What is black when you buy it, red when you use it and gray when you throw it away?
Answer: Coal.
10. I am always wet but never dry. What am I?
Answer: A towel.