Here’s a short but tricky brain teaser that looks simple at first. There are five sisters in a room: Ann is reading, Margaret is cooking, Kate is playing chess, and Marie is doing laundry. So what is the fifth sister doing? The trick is hidden in the wording. Chess requires two players, so the fifth sister must be playing chess with Kate. Did you spot it?

Now for a classic middle-school math challenge. It may look easy, but solving it correctly requires remembering the order of operations. Take a moment to work it out without a calculator before checking the answer. The expression is: 6 − 1 × 0 + 3 ÷ 3. Which operation should you perform first?

To solve it, remember PEMDAS: multiplication and division come before addition and subtraction. First, calculate 1 × 0 = 0 and 3 ÷ 3 = 1. The expression then becomes 6 − 0 + 1, which equals 7. So the correct answer is 7.

Both puzzles are simple once you notice the key detail, but that’s what makes them fun. The sister riddle tests whether you can recognize an assumption hidden in the wording, while the math problem tests whether you remember basic operator precedence. If you got both answers right, congratulations—you still have some sharp problem-solving skills!