Optical illusions can be as fun as they are frustrating.
They get our brains working to find something that, at first, may seem impossible.
Spot the cat
These kind of illusions require the fastest of brains... After all, you only have 3 seconds to spot the odd one out.
It may sound like plenty of time, but often the more you try, the harder these kinds of puzzles become.
If you've already managed to find the cat, well done! Only the quickest minds will find the furry intruder that quickly!
Here's the trick
For those of you that haven't quite managed it, fear not. We wouldn't leave you wondering.
As you can see from the image below, the little cat is actually nestled in among the dogs. Perfectly camouflaged to make the game that little bit harder.
If you didn't spot it this time, keep practising. Optical illusions are all about brain training - the more you do, the quicker you'll become at solving the next one.
