At first glance, this puzzle looks simple—but don’t be fooled. It’s designed to trick your brain.

You’re asked to find the weight of a single red ball using two balanced scales. On one side, you see multiple red balls along with a 2 kg weight. On the other, fewer balls with a 7 kg weight. It seems straightforward… until you try to solve it.

This is where logic comes in.

Let’s break it down. On the left scale, there are 5 red balls + 2 kg. On the right scale, there are 3 red balls + 7 kg. Since the scale is balanced, both sides must weigh the same.

So we can write it like this:

5 balls + 2 = 3 balls + 7

Now subtract 3 balls from both sides:

2 balls + 2 = 7

Then subtract 2:

2 balls = 5

Which means 1 ball = 2.5 kg.

Many people get this wrong because they overthink or don’t translate the image into an equation. This puzzle tests your ability to simplify information and apply basic logic.

So… did you get 2.5 kg on your first try? Or did your brain try to complicate it? 👀