The Riddles

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Across
  1. 3. The person who makes me doesn’t need me. The person who buys me doesn’t use me. The person who uses me doesn’t know it.
  2. 4. I’m lighter than a feather, yet the strongest man cannot hold me for long.
  3. 6. I am an odd number. Take away one letter and I become even.
  4. 7. I’m not alive, but I grow. I don’t have lungs, but I need air.
  5. 11. I am a room, however, I have no doors or windows.
  6. 12. I have ears but cannot hear.
  7. 13. I’m always running, but I never move.
  8. 14. This number becomes smaller when you turn it upside down.
Down
  1. 1. The more you take away from me, the bigger I get.
  2. 2. I can fill a whole room while taking up no space.
  3. 4. I have branches but no leaves, trunks or fruit.
  4. 5. I have an eye but can't see.
  5. 7. I’m always in front of you, but you can never see me.
  6. 8. I have many keys but can't open a single door.
  7. 9. As soon as you say my name, I'm broken.
  8. 10. The more of me you take, the more you leave behind.