Answer:
What is the difference between yesterday and tomorrow?
How do you blink twice without blinking twice?
If you have 30 white socks, 22 black socks, and 14 blue socks scattered across the floor in the dark, how many would you have to grab to get a matching pair?
What moves and touches water but doesn't get wet?
What always comes into a house through the keyhole?
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.