It’s time to put those observation skills of yours to the ultimate test with a series of viral picture puzzles.

In today’s challenge, we ask you to take a close look at the pictures below before trying to figure out what’s wrong with them. Each of the two pictures shared features one major error. But can you spot it?

To pass our first test, focus on the wristwatch seen in the graphic above. While the most experienced viewers managed to crack this puzzle in just under 10 seconds, some need more than a minute to figure out where the mistake lies.

Get your timer ready and let us know how long it took you to spot the error.

We can tell you that there’s nothing wrong with the band or the design of the watch. Perhaps you should focus on the Roman numerals instead?

The answer hides in numerals XI (11) and IX (9). The two were switched and the person who bought this watch definitely won’t be happy once they realize the error!

Did you manage to crack the puzzle on your own? This was just a warm-up. The next picture riddle is even harder to crack and most viewers struggle to find the error at first glance.

Once again, get your timer ready. To pass this test, you should be able to spot the error in just twenty seconds!

This time, we’re looking at an office desk with a printer, telephone, and a laptop resting on it.One might also notice a mousepad, a mouse, a calendar, and a cup of tea. But where’s the mistake?

To spot the error, you should focus on that calendar. What does it say? Is there anything off about June 31?

How fast did you pass these visual challenges? 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!