Answer:
What is lighter than what it is made of?
Hard to catch, easy to hold. Can't be seen, unless it's cold
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
A doctor might remove one from the neck of a Dracula victim.
If Mississippi should lend Missouri her New Jersey, what would Delaware?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?