It's almost the weekend, and soon many of us will be switching off their work laptops and shutting down for a couple of days.
While it's nice to have a break from work, it's also a good idea to keep your brain sharp.
One way of doing this is with optical illusions or brain teasers, which are designed to test and play tricks on you.
Brain teasers are also a tried and tested way of improving your mood and providing your brain with a much-needed boost.
If you do them regularly they are known to greatly improve your thinking and problem-solving abilities, so why not try one out this weekend?
JagranJosh has recently shared an adorable but tricky brain teaser that is sure to exercise your noggin. It will require you to "coordinate your senses with your brain".
The website has also joked that if you solve it within seven seconds you can officially call yourself smart – which is something you can boast about at work on Monday.
In their brand new brain teaser, you can see a litter of cats. At first glance you might think all of them have something different about them – but that's not the case. There's more than first meets the eye.
First, have a go at cracking the brain teaser yourself. The website gives you seven seconds. And if you manage that you're a genius in our books too, because it's not simple.
Did you manage to find the odd cat out? If so, let us know in the comment section below.
Do you need a hint? Most of the cats have an identical twin – or one that is mirrored. However, one cat doesn't have a mirrored version or identical version.
If you're still struggling to spot the odd cat out, take a look at the picture below.
If you're looking for more mind-boggling optical illusions, why not try to find the correctly spelled word here?
Or you could challenge yourself to find the panda among the humans in this puzzle within seven seconds.
You could try and spot five items within this image here.
Alternatively, you could try and find out your worst personality traits with this optical illusion.
Did you manage to find the odd cat out? Let us know in the comment section below.
