A picture showing a home office has gone viral after viewers spotted a big mistake.

If you’re familiar with puzzles of this type, you probably know just how hard your brain has to work to crack the mystery and come up with the correct answer.

To help you train those observation skills of yours, we have prepared a special visual challenge that will test both your eyes and your logical thinking.

Let’s get started! Take a close look at the picture above and tell us if you can spot the mistake.

Something in the image is terribly wrong, and only a minority of the viewers are able to spot the error.

As you can see, the picture shows a home office filled with essentials such as a working desk, a chair, a telephone, a notebook, and other office materials. While nothing looks wrong at first glance, trained eyes can detect an error in less than twenty seconds.

If you’re still looking for that mistake, here’s a hint that will help you solve the mystery. The error concerns one of the objects on that table.

You might want to take another look at that calendar!

As it happens, September only has 30 days and not 31 as the calendar suggests.

Did you manage to spot the error? How long did it take you? If you failed at your task, here’s another chance for you to prove yourself.

In the picture above, you can see a colorful bathroom with a large sink and a bathtub. Once again, there is also a big error hiding somewhere in the picture. Let’s see if you can find it!

To spot the error, focus on that sink. Isn’t it missing something?

The answer is sink drain! The sink is missing a drain pipe and that’s the mistake you were looking for.

How fast did you solve these puzzles? Let us know in the comments and don’t forget to SHARE this post with your family and friends. For more riddles and stories, follow us on Facebook!