People who have strong observational skills are often able to spot breaks in patterns quickly and easily.
And a great way to develop observational skills is to challenge yourself with puzzles, brain teasers and optical illusions.
This brain teaser challenges you to find the number 218 among rows and rows 278s - and it has left people scratching their heads.
As reported by the Mirror, only those with hawk-like eyes can spot the odd number with ease, but practising brain-teasers like this will allow anyone to improve their own abilities.
Below is the full image, look carefully at every row and column so see if you can spot the off number.
If you're struggling with where to start then try scanning each row individually, going across and then down to pinpoint the outlier.
A helpful tip might be to focus on the middle number of the three digits as that's the one that'll give you the answer fairly quickly.
If you would like a clue, take your focus away from the left side of the image, as the odd number isn't there.
You can scroll on to reveal the answer - but consider this a spoiler warning.
If that was too easy and you're looking for another test, here is another recent brain teaser which challenges viewers to spot a hidden I among a sea of Js in nine seconds.
Or if you would like to try something a little different, why not give our latest Friday Night Pub Quiz a go.
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