This little brain teaser looks easy at first, but there’s a clever detail hidden in the description. The challenge isn’t really about complicated logic—it’s about noticing something that is easy to overlook.
Imagine a room where five sisters are spending time together. Four of them are clearly described as being busy with different activities.
Ann is relaxing with a book and reading quietly.
Margaret is preparing food in the kitchen.
Kate is sitting at a table playing chess.
Marie is busy washing clothes and taking care of the laundry.
Everything seems to be explained, so naturally, the question comes up:
âť“ What is the fifth sister doing?
You might think the fifth sister must be doing another completely different activity. But there’s a small clue hiding in Kate’s activity.
Think about chess.
Kate can’t play a normal game of chess by herself. A game requires two people—one person makes a move, and the other responds.
So if Kate is already playing chess, someone else in that room has to be sitting opposite her and playing too.
That person is the fifth sister.
âś… Answer:
The fifth sister is playing chess with Kate.
The trick is that the fifth sister was never given a separate activity because she is already included in Kate’s activity. The puzzle tests whether you carefully examine the wording instead of immediately assuming that every sister must be doing something different.