Good Riddles

Question: A box of marbles costs $20. If the marbles are worth $19 more than the box, what is the box worth?

Question: My first is often at the front door.
My second is found in the cereal family.
My third is what most people want.
My whole is one of the united states.

What am I?

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

What am I?

Question: There are 57 ducks walking to a pond. On the way, 15 get lost, 26 head back, and 16 make it to the pond.

What happened to the rest?

Question: A smooth dance, a ball sport, a place to stay, an Asian country, and a girl's name.

What's her name?