Math Riddles

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

Question: What 3 positive numbers give the same result when multiplied and added together?

Question: If 1/2 of 5 is 3, then what is 1/3 of 10?

Question: 2 men catch 2 fish in 2 minutes. At this rate, how many men could catch 500 fish in 500 minutes?