What Is the Weight of the White Ball? ⚖️

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At first glance, this puzzle looks incredibly easy.

Most people immediately notice the number 90 and rush to an answer. That’s exactly where the trick begins.

Look closely at the small balance on the right. It is perfectly level, so both sides must have the same total weight. One side has three pink balls, and the other side has a 90-unit weight.

That means:

  • 3 pink balls = 90
  • 1 pink ball = 30

So far, so good.

Now examine the large balance.

On the left side, there are two white balls and one pink ball, so the left side weighs:

2 white balls + 30

Here’s the part that fools most people:

The large balance is not holding just the 90-unit weight. It is holding the entire smaller balance, which means it supports both sides together.

The small balance contains:

  • Three pink balls = 90
  • One 90-unit weight = 90

So the total weight hanging from the right side of the large balance is:

90 + 90 = 180

Since the large balance is level:

2 white balls + 30 = 180

Subtract 30:

2 white balls = 150

Divide by 2:

1 white ball = 75

Final Answer

The white ball weighs 75.

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