1. What has many keys but can't open a single lock?

2. What has one eye but can’t see?

3. What begins with an E and only contains one letter?

4. What comes once in a minute, twice in a moment, but never in a thousand years?

5. What gets bigger the more you take away?

6. What can be cracked, made, told, and played?

7. What comes down but never goes up?

8. What has a head and a tail but no body?

9. The more you take, the more you leave behind. What are they?

10. What can you catch but not throw?