Deciphering challenging puzzles or identifying intruders in pictures is a very fun way of spending your time, although noticing the slightest changes isn’t always easy. This challenge is one way of improving your problem-solving and quick-thinking skills. Can you find the four cats?

But, besides that, people just love burying their heads into work to try and find the solution to a visual problem presented to them. Maybe it’s because they want to feel smart or maybe because they love the challenge. Or maybe they want to get their inner detective abilities unleashed.

We admit that we didn’t notice the last one until it was pointed out to us, and now we’re wondering how we missed it. That’s how it goes at times. Is it possible for you to locate all of the images, and if yes, how long did it take you?