Good Riddles

Question: Why did the boy throw the butter out the window?

Question: How do you make seven even?

Question: A man goes to work taking a very long bus route, transferring to different buses many times. First, he gets on bus number 60, then bus number 12, then bus number 240, then bus number 48. Which two buses would he get on next?

Question: A child asked his grandfather: "When you were young, what were you?" The grandfather replied, "I am one hundred, nothing, one thousand, one and one hundred". What's his career?

Question: You wait for it. It cracks, stays for a moment, and then vanishes before your eyes. What is it?