They can be entertaining and infuriating in equal measure. Optical illusions and brainteasers are a fantastic way to keep your mind sharp and can be fun for all the family to get involved with.
Many people find as they continue to challenge themselves, they can become easier to do, The Mirror reports. Freshers Live has produced a new brainteaser that demands you find the number 324 hidden in a sea of 374s.
But there is a catch - you have to complete it in 20 seconds. Take a look at the image below and try to locate the 324. It's difficult, but it can be done.
Do you think you'll manage to spot it in just 20 seconds?
Split the image up into sections and let your eyes drift down the columns, trying to spot the number 324. It's difficult because when you look at the sea of 374s, all the numbers begin to look the same and your brain gets tricked.
That's why only the brainiest of people can manage to spot it. Did you? Here's a hint: look on the right side of the image, rather than the left. You'll be able to spot it more easily that way.
Look at something else, and then refocus your brain, and try again. The answer is coming up, so don't scroll if you're still trying to figure it out...
Did you manage to spot it? It's there, tucked away in the top right-hand corner of the image. Were you eagle-eyed enough to find it?
If not, at least you know that you'll need to work on those optical illusion skills.