Math Riddles

Question: Does a ton of feathers or a ton of bricks weigh more?

Question: What number do you get when you multiply all of the numbers on a telephone's number pad?

Question: There is a chain nailed to the wall. The chain is 10 feet long and the center of the chain dips down 5 feet from where each side of the chain is nailed to the wall. How far are the 2 ends of chain from each other?

Question: If you have a cake, how many pieces of cake can you form with 3 straight cuts?

Question: Mr. Smith has 4 daughters. Each of his daughters has a brother.

How many children does Mr. Smith have?