IF you can find all the number 7s in this mind-bending optical illusion then you're in the top one per cent – how many can you spot?
TikTok star Hectic Nick posted the visual brain teaser to social media, telling his 3.9million fans: "Only one per cent of people can find all the 7s in the image."
Many people were stumped by the mind-blowing optical illusion, with the post racking up nearly 13,000 comments from viewers sharing their guesses.
Some suggested there were 17, while others thought there were as many as 28.
Sitting in front of the camera in a leather jacket and mirrored sunglasses, Nick pointed to the image above his head and challenged everyone to guess – but he doesn't reveal the answer.
So how many 7s can you see?
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One viewer said: "I spotted 1 straight away and ended up with 17."
Another wrote: "28 if you count the ones that don't close and the starting of each line."
And a third said: "No it's 19."
TikToker Hectic Nick has shared dozens of thought-provoking optical illusions to his followers, who rave about the brainteasers he posts.
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In the video, he explains to his followers: "What your about to see is gonna freak you out."
In another video, an optical illusion plays tricks on your mind by making you see colour in black and white.
Optical illusions often use colour to confuse the human brain – and Hectic Nick recently proved this.
Nick displays two images that illustrate how an optical illusion can make your brain believe that a black-and-white image is in color.
First, the content creator shared an image of a building complex in neon blue, orange, and purple hues.
In the center of the image is a black dot, which the TikToker urges users to focus on.
"Keep your eyes on this black dot, do so for about ten seconds," Nick said in the 17-second clip.
Shortly after, the image transforms from an over-saturated visual to black-and-white.
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However, if viewers had been looking at the black dot as instructed, the picture actually appears for a moment to be in color.
"Watch what happens as it now changes. This image is black and white but I bet you saw some colour when it changed,” Nick said.
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