A puzzle which has been repeated so many times that people who know it groan at hearing it again. This is roughly my criterion for inclusion on this page -- that they make me groan upon re-reading them somewhere -- but as a result, some that are only 10 years old or perhaps newer appear here.

** Note: Most of these links will take you to a node with a more detailed version of the question, but ones marked with bold double asterisks take you directly to an answer node. **

Old chestnuts on Everything:

This expression comes from the nineteenth century play “The Broken Sword.” One of the characters is continually telling the same jokes. He does, however, alter them very, very slightly each time. At one point in the play he tells another character a joke involving a cork tree, the other character tells him it was a chestnut tree, he continues by saying that he has heard the joke twenty seven times and knows it’s a chestnut.

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