All in the Family S03E04 - Gloria and the Riddle

Gloria has become friends with a girl named Tammy and they have been organizing a Women's Fair. Male chauvinism is put to the test when Gloria poses a riddle to Mike and Archie who are stumped when they can't come up with the answer. Archie even goes to his drinking buddies for help, but to no avail. However, it is Edith who suddenly comes up with the answer (an answer that Archie doesn't want to hear).