Visual tests often rely on a very simple mechanism: a series of nearly identical objects, among which a slightly different element has been inserted. Why does our brain love this so much? Because it loves to classify, compare, and solve.
When you're searching for the odd one out, numerous neural connections are activated: you scrutinize, you eliminate, you zoom out, you zoom back in… It's a veritable internal ballet. In a few seconds, you enter a bubble where only the task matters. This little " focus mode " helps strengthen your ability to concentrate, like a gentle but effective workout.
Answer :

The intruder is hiding in the center of the image, more precisely in the second drawing of the third line from the top.
Perfect challenges for taking a constructive break
If you're looking for a healthy and unwinding break, these visual tests are ideal. No equipment is needed, nor does it require a long period of concentration. You can do one while drinking your coffee, on public transport, or during a short break at work.
They provide immediate satisfaction: finding " the hidden detail " gives a very pleasant little thrill of victory and strengthens motivation.
3 tips to become unbeatable in observation games
Start by observing the big picture. Before looking for the tiniest detail, take a second to spot the larger shapes.
Scan the image by areas. Like reading line by line: this avoids straining your eyes.
Trust your intuition. The brain sometimes detects something "odd" before we even know why.
With a little practice, you'll be surprised at how quickly your eyesight sharpens!
A leisure activity that makes you feel good
What makes these games so enjoyable is also their lighthearted, low-stakes nature. We play for fun, to challenge ourselves a little, to feel more energetic. And ultimately, this simple joy makes all the difference.
A great way to show that taking care of your mind can be as fun as child's play.