You could have a top IQ if you can work out which cup will fill up first in this puzzle within 20 seconds

IF you manage to work out which cup will fill up first in this puzzle in record time then you belong to the elite with a top IQ.

An expert says that only a handful of people can solve the below brainteaser within 20 seconds – but are you willing to give it a go?

TikTok/hecticnick

TikTok users were asked which cup is likely to fill up first[/caption]

The puzzling picture shows a water network of several cups that are connected by pipes of varying lengths.

But notably the water source for all of them is just the one tap.  

TikTok star Hectic Nick claims that only 99 per cent of people can figure it out which cup is likely to fill up first in record time.

And users in the comments were quick to make their own conclusions after he shared the latest puzzle online.

One theorised “None of them will fill up completely,” after noticing that some of the drains were blocked.

Another agreed: “None because 2 wont stop pouring into 7.”

While a third added: “It’s one because 3is blocked and 7 has a hole so number 2 will keep pouring into 7 and not full up.”

The answer was later revealed as cup number 6 because pipe number three is blocked, and cup number seven has a hole in it.

It comes after the TikToker shared a mind bending illusion that makes circles appear as though they’re spinning.

At first, the video shows a circle of eight white dots moving back and forth in a straight line inside a larger red circle.

Then, as more and more circles are added, it appears the white circles are rotating in their own small circles.

The video was posted by the user HecticNick, who has a whopping 3.9million followers.

It has been viewed over 12million times.

The video was also shared by brusspup on Youtube, where it’s garnered more than 6.8million views.

A Slate writer explained the phenomenon in an article, saying with most illusions, if you look hard enough, your brain can break it.

“Not with this one,” the author wrote. “It’s maddening.” 

Elsewhere, users were also put in a spin by optical illusion that can make users feel dizzy if they stare at it too long.

Plus a visual puzzle is said to reveal whether or not you are short-sighted.