You'll need perfect 20/20 vision to find hidden letter 'B' in sea of numbers

Brainteasers have become a national obsession, with countless puzzlesand teasers occupying our minds. Only those with perfect vision can solve them.

The latest company to challenge your eyesight and mental agility is software solutions provider Nsoft, with a mind-boggling teaser that requires sharp eyes to spot the letter amongst the numbers.

The brainteaser challenges you to find the letter 'B' hidden among rows of numbers. However, only those with 20/20 vision can spot the elusive letter - and there's a record time of 19 seconds to beat. It's an incredibly tough test that might make you go cross-eyed as you try to solve it, especially when you're racing against the clock.

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Participants are asked if they can spot the letter among scores of numbers in the image. The location of the letter appears as a green spot on a black background, making it almost impossible to see.

So, why not turn this brainteaser into a friendly competition with your mates and family to see who has the sharpest eyes?

But be warned, it's not easy and you might face disappointment if your friend wins. Instead of looking at the whole image, why not break it up into sections to focus your search? If you're still struggling to find it, be warned the answer is below.

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The Mirror recently unveiled atricky autumn brainteaserthat will test your eyesight to the limit. The eerie puzzle, perfect for the Halloween season, was created by Lords and Labradors and challenges you to spot a bat hidden among a horde of black cats.

This brain-boggling task is not as easy as it seems, with the bat cleverly camouflaged amongst the felines. On average, it takes people 28 seconds to find the elusive creature, making it a true test of your visual acuity and quick thinking. Why not set a timer and see if you can beat the average?

It's a fun way to stir up some friendly competition amongst friends and family - who can spot the bat first? A handy tip for tackling this challenge is to break the image into sections rather than scanning the whole picture at once. Start from the top left, then move to the bottom left, and so on, until you've covered the entire image.

But the question remains - were you able to spot the bat amidst all the cats? If you're still struggling, here's a clue: the sneaky critter was hiding on the right-hand side of the image, perfectly blending in with the cats.