How good is your riddle solving?

Can you figure them out? LETS SEE THEN! *click*

1 Before Mount Everest was discovered, what was the highest mountain on Earth?
2 A farmer has 17 sheep and all but 9 die. How many are left?
3 A butcher in the butcher shop is 5' 10" tall. What does he weigh?
4 The maker doesn't want it; the buyer doesn't use it; and the user doesn't see it. What is it?
5 A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven't eaten in 3 years. Which room is safest for him?
6 Which is correct to say, "The yolk of the egg are white" or "The yolk of the egg is white"?
7 How many times can you subtract the number 5 from 25?
8 I'm curious of how quickly you can find out what is so unusual about this.
9 A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be?