Ring In The Ladies' Room
Riddle: Janet is a janitor of a large museum. One day, while cleaning the ladies' room, she spots a precious ring with red gems. When Janet leaves the ladies' room, three people–Sarah, Catherine, and Harold–show up to claim it. Sarah said that the ring belonged to her grandmother; emeralds fit her green eyes perfectly anyway. Catherine asked if the ring had an engraving etched inside, and if it was damaged in any way. Harold said that he lost the ring while washing his hands; he was going to propose to his girlfriend in a few days. Janet decided that the ring belonged to Catherine. Why?
Answer: If the ring belonged to Sarah, then she wouldn't have mentioned emeralds, because the stones on the ring are red, not green. And Harold wouldn't have been allowed in the ladies' room. Catherine was the only one who knew about the engraving on the ring, as well as how precious it is, so the ring must be hers.
Source: https://www.riddles.com/11390
