Giving your eyes good exercise can be just as important as going for a jog or lifting weights at a gym.

If you’re ready to get your daily dose of mental recreation now, you’ve come to the right place. From testing your visual skills to encouraging you to embrace logical thinking, the picture puzzles we have gathered are sure to brighten up your day and improve your ability to solve real-life problems.

Roll up your sleeves – It’s time to get started!

In the picture above, you can a dark-blue notebook, a green notebook, and a pile of colored notepads on top of a wooden desk. You might have also spotted a ballpen and a metal chain with a lock and a key for the lock on the table.

But somewhere in the picture, there is also a big mistake that only a few viewers managed to spot. Is there something wrong with the notebooks? Or perhaps the error concerns the lock or the ballpen?

It’s time you find the mistake yourself!

Have you found the error yet? If not, feel free to scroll down to view the answer. But before you do that, make sure you’ve already put in your best effort.

If you need a bit of help, we can tell you that there’s nothing wrong with those notebooks or the table. This should make your search for the error much easier!

And here’s the answer for those who can wait no longer:

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As you can see, the key and the lock have different patterns and they don’t belong together.

If you could use some more fun while putting your observation skills to the test, try cracking the puzzle below as well.

This time, you’re looking at an image featuring dozens of 3s. At first glance, all of the numbers appear the same, but one of them is actually different than the rest of the lot.

Spot the odd one out now, and make sure to verify your answer below once you’re done!

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