Kevin, Steven And Mark Riddle
Riddle: There were three boys named Kevin, Steven, and Mark. One day the boys were playing a ball game one of the boys accidentally throw a ball at a detective's window. The next day the detective got a note saying an apology at the end of the note, it says by question mark. Who did it?
Answer: Mark did it because question mark has Mark in it.
Source: https://www.riddles.com/7988
