Conundrum

a puzzling query, the answer to which involves a turn of wit, usually a pun. A conundrum proposes usually the discovery of a resemblance between things quite unlike, or the discovery of some odd difference between similar things.

Q. Why is a blind beggar ungrateful? A. Because he would be glad to see the giver hanged. Q. How may a husband be made tender? A. By roasting. Q. Why do white sheep produce more wool than black ones? A. Because there are more of them. Q. Why does a duck take to the water? A. For divers reasons. Q. What state is round at each end and high in the middle? A. Ohio. Q. When is charity like a top? A. When it begins to hum. Q. What drums are never beat? A. These conundrums.