Only those with perfect 20/20 vision can spot hidden letter 'B' in sea of numbers

Software provider Nsoft is the latest company to put your eyes and mind to the test with a mind-boggling teaser where you are asked to find a letter among the numbers

Wracking your brain has become a national pastime as people are determined to find a solution to a problem or brainteaser.

Countless head-scratching puzzles and teasers occupy our lives and only those with perfect eyesight can see them. A software solutions provider called Nsoft is the latest company to put your eyes and mind to the test with a mind-boggling teaser which you will need sharp eyes to find the letter amongst the numbers.

The brainteaser asks people to spot the letter 'B' among the rows of numbers. But only those with 20/20 vision can see the letter - despite a 19 second record which they have to beat. It is an incredibly tough test to beat and definitely seems to make you go cross-eyed as you try to solve the puzzle. And it's even more taxing when you are against the clock and the seconds are ticking down. People doing the teaser are asked if they can see the letter among scores of numbers in the image. And the location of the letter is seen as a green spot on a black background, which is almost impossible to see.

You can do this brainteaser with your friends and family and get competitive with them to see who has the sharpest eyes. But it is not easy and you might face disappointment if your friend wins. Rather than looking at the whole image, why not break it up into sections so your search is more focused? If you're still struggling to find it, be warned the answer is below.

The Mirror revealed recently that sharp eyesight is needed with another autumn brainteaser. The spooky puzzle was appropriate for the time of year as we approach Halloween. Created by Lords and Labradors, they are asked to spot the bat among the row of black cats. It seriously put your skills to the test as the bat cleverly blends in among the cats.

On average it takes people 28 seconds, so it is a test of your eyesight is and determines if you are brainer than most. You must spot the bat amongst the felines before the time runs out - so you had better set your clock. Enlisting your friends and family as a fun way to get competitive with them to see who has the sharpest eyes and who can spot the bat first?

Rather than looking at the whole image, why not break it up into sections so your search is more focused? First, have a look in the top left of the image, then the bottom left, and so on, until your eyes have been cast over the whole image. The question remains did you manage to find the bat among all the cats?

The best way of tackling this brain teaser is to first have a look in the top left of the image, then the bottom left, and so on, until your eyes have been cast over the whole image. The answer is the critter was hiding on the right-hand side of the image - but blended in so perfectly with the cats.