How many holes does this t-shirt have? Only one in seven people gets the answer right.

The final (and correct) answer

Let’s go over the final calculation again:

  • 1 hole for the head
  • 2 holes for the arms
  • 1 hole at the bottom
  • 2 visible holes on the front
  • 2 holes corresponding to the back

Total: 8 holes

Yes, 8. An answer that seems exaggerated at first glance, but which becomes obvious once the explanation is laid out in black and white.

Why does this puzzle work so well?

This challenge is remarkably effective because it relies neither on mathematics nor on any particular knowledge. It simply highlights how we perceive objects. We see what we think we should see, not always what is actually there.

This is also why this kind of  viral visual challenge  spreads so easily: it provokes that little moment of surprise, followed by a “But yes, of course!” which immediately makes you want to share it.

An excellent exercise for the mind

Visual puzzles like this one are like mini-gymnastics for the brain. They force us to slow down, to observe differently, and to question our assumptions. And let’s be honest: there’s a certain pleasure in discovering that we’ve been tricked… before we can trick others in turn.

And you, did you find it?

If you answered 8 on your first try, congratulations: you’re part of the ultra-attentive minority. If not, don’t worry, you’re in excellent company.

The next time you put on a t-shirt, chances are you’ll think about this  surprising visual puzzle … and you’ll never look at your clothes the same way again.