Most of us will be fairly confident that we can count from one to 50 without any struggle, however this puzzle may just have you questioning your numeracy skills.
Although this seems fairly straightforward at a glance it can be nearly impossible to spot.
The aim of the game is to spot the missing number as quickly as possible without having to count in numerical order to discover it.
Those with the eye of a hawk should be able to identify the fact that the 32 is missing with the sequence jumping from 31 to 33.
Many users will overlook the mistake because they are so familiar with the sequence making it more difficult spot any immediate errors.
This is just the latest in a series of brainteasers to leave netizens scratching their head as they search for a missing object.
Only a tiny one per cent of the population will be able to spot the hidden assassin in this vintage illustration.
This image, posted to Playbuzz, features a man drawing a gun as he prepares to engage in a duel, while a group of bystanders look on - but where is his adversary?
The opponent will soon need to reveal himself so that the action can begin, but for the time being he remains invisible.
It's even more difficult to see him blending into the background because of the black and sepia toned image.
Were you able to spot him in the illusion "Question of Honour", or was he too well hidden?
The man is in fact on the right hand side of the photograph nestled discreetly between two trees where he blends into the background.
It is said that only one in eight highly perceptive people can spot the fox in another optical illusion to baffle the internet.
The picture posted on Playbuzz, features a gaggle of geese standing under a tree, unaware that a fox is lurking nearby and getting ready to pounce.
Over 2,000 people have taken on the challenge of finding the fox, and 70 percent claim to have spotted him, but can you?
The fox is in fact between the branches of the trees, looming above the geese underneath.
He is so much larger than the birds below that once you spot him you will wonder how you ever missed him.
Another puzzle to leave players baffled is a very intricate monochrome image, posted to Playbuzz by user Name The Player.
It features a wide array of different sized capsules and tablets, all of which are black and white.
However, there's also a hidden creature discreetly nestled among the medications.
If you look closely, you will find that there's a panda hiding among the pills, but the monochrome image makes him especially difficult to see.
If you can't manage to distinguish the odd-one-out in the spread of pills, simply scroll down for the answer...
Another Playbuzz quiz which has proved popular asks users to try and find the lucky charm hidden in the field.
While it may sound easy, the four leaf clover is disguised between other three leaf clovers and multi-coloured pigs - and there is even one pig in a top hat!
A lot of the clovers might look the same but there is one that has an extra leaf which makes it extra special.
If you look really closely then you will be able to spot it in the top right hand corner next to a brightly coloured yellow pig.
To help you out, the four leaf clover has been revealed in the second picture in case you couldn't find it - with the help of a red circle.
The top hat on the pig might have been placed there to distract you so did you spot it straight away?