At first glance, all four glasses look identical.
Each one appears to be filled to roughly the same level of water, making this puzzle seem simple. But look closer—there’s a twist hiding in plain sight.
Inside each glass, there’s a different object:
- A: scissors
- B: a paperclip
- C: an eraser
- D: a watch
Most people assume the glass with the highest visible water level contains the most water. But that’s where the trick lies.
The key detail many miss is this:
👉 Objects displace water
The larger the object inside the glass, the more water it pushes upward, making it look like there’s more water than there actually is.
So while Glass A (with scissors) appears full, a big portion of that space is taken up by the object itself—not water.
To find the correct answer, you need to identify the glass with the smallest object, because it displaces the least amount of water.
👉 The correct answer is: B (the paperclip)
It contains the most actual water, even though it may not look like it at first.
This puzzle works because our brains trust visual levels more than logic.
