Answer:
Who has married many women but never has been married who is he
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
In marble halls as white as milk, lined with a skin as soft as silk. Within a fountain crystal-clear. A golden apple doth appear. No doors there are to this stronghold, yet thieves break in and steal the gold.
What goes in the water red, and comes out black?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?
What did the piece of wood say when he saw the screwdriver and screws approaching?