A conundrum is a type of puzzle or problem that is difficult to solve or understand. It often involves a situation where there are conflicting choices or unclear outcomes, making it challenging to find a straightforward answer. Conundrums can appear in various contexts, including mathematics, philosophy, and everyday life. In literature and conversation, a conundrum may also refer to a riddle or a question that requires creative thinking to resolve. For example, the classic riddle, "What has keys but can't open locks?" is a conundrum that plays with language and logic, leading to the answer: a piano.