At first glance, this puzzle looks like a simple math problem, but it quickly gets people second-guessing themselves. With three scales, a few school supplies, and the claim that “99% of people get it wrong,” it’s easy to overthink the answer. The challenge is to solve it step by step using the clues shown on each scale.

The first scale shows three identical pencils weighing a total of 150, so each pencil must weigh 50. The second scale shows one pencil and one notepad weighing 350. Since the pencil weighs 50, the notepad must weigh 300 (350 − 50 = 300).

Now comes the final clue. The third scale shows the notepad and a pair of scissors with a combined weight of 450. Since we already know the notepad weighs 300, subtracting that from 450 leaves 150. The correct answer is that the scissors weigh 150 units.

This puzzle is a great reminder that the simplest approach is often the best one. Instead of rushing or guessing, breaking the problem into smaller steps makes the answer clear. Share this brain teaser with your friends and see how many of them can correctly figure out that the scissors weigh 150!