Logic Riddles

Question: There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

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: What was the president of the United State's name in 1980?

Question: There are three words in the English language that end with the letters 'g', 'r', and 'y'. Two are "hungry" and "angry." The third word is something everyone uses every day. Everyone knows what the third word means. What is the third word?

Question: 20 people jump into an empty swimming pool but 24 heads come up. How did this happen?