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

At first glance, the question seems almost too easy. A t-shirt, holes… nothing could be more ordinary. And yet, this puzzle has managed to stump thousands of people on social media. The kind of challenge that gives you confidence for three seconds, before sowing a seed of doubt. So take a deep breath, forget the easy answers, and look closely… because here, it’s all about observation.