Grape joke

A Grape joke is a specific type of question - answer joke. The listener is not expected to provide the answer, but to ask for it to be provided by the teller of the joke.

• A question: "What's purple and ..."
• An answer: "... grape"

Examples:

This is a word play on a mathematical term, an abelian group. One of the mathematical properties of abelian groups is their commutative property, where a*b = b*a. The setup relies on the listener assuming the more common meaning of commute - to travel from home to workplace or vice versa. (Since "home" and "workplace" may be exchanged in this description, it is in a sense also commutative.)

See Also

• Knock-knock joke