Good Riddles

Question: You have 20 sick sheep, one dies. How many are left?

Question: What's black, white, and red all over?

Question: What does this code mean?: YY U R YY U B I C U R YY 4 ME

Question: Two brothers are twins. One twin says he is older than the other. The other twin is confused and says: in order for us to be twins we have to born on the same day. How is the one twin older than the other?

Question: why did the cops raid the orchestra pit?