Good Riddles

Question: What is 40 divided by 1/2, plus 15?

Question: Draw, fire, or fill me;
I'm still empty.

What am I?

Question: What is one in every doll, in every doll, in every doll?

Question: I'm many people's favorite place,
even though many don't remember their stay.
You'll love to come but hate to leave,
if you get cold use my sleeves.

What am I?

Question: Round like a dishpan and smaller than a bathtub.But the ocean can't fill it.What is it?