Good Riddles

Question: A hobo picks up cigarette butts from the ground and can make a cigarette with 4 butts. If he finds 16 cigarette butts, how many cigarettes can he make?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?

Question: What jumps when it walks and sits when it stands?

Question: A blue man lives in a blue house. A green man lives in a green house. Who lives in the white house?

Question: If 1+9+8=1, what is 2+8+9?