There are many ways of exercising your brain, from general knowledge quizzes to logic-based sudokus, but optical illusions are also fun and engaging ways of improving your mind's problem solving skills.
If you solve optical illusions and brain teasers regularly you can also boost your memory, concentration, focus and increase your ability to spot hidden objects. And let's not forget, these puzzles can be fun.
So why not challenge yourself to complete this optical illusion? In the image below you'll see a sequence of digits, which all appear to be the number 254 – but there's more than meets the eye.
Even though you might not see it at first glance, there is one number 264 that only those with "eagle eyes" can see within three seconds, according to website JagranJosh.
It might sound impossible, but those with very keen eyesight, a knack for problem solving and laser focus can manage it within the timeframe.
Can you find the number 264 hiding within the sea of 254s? Try looking at each row and column carefully to try to spot it. Put your analysing skills to good use, but hurry because you only have three seconds.
Don't worry if you didn't find it within the time limit, because apparently only one in 10 can. Take your time and try to spot it, as you'll still be challenging yourself, and you might be quicker next time.
Still struggling? The number is hiding in plain sight. Try looking at the right half of the image, slightly towards the centre. We've posted the answer below for you, so stop reading here if you want to find it first.
According to JagranJosh, if you managed it you are "highly observant, have a "strong sense of orientation. and are "incredibly analytical".
Why not try a few others to see if you can put your skills to the test further? If you enjoy a number-based brain teaser, try finding the 725 among the 775s within seven seconds.
Alternatively, you can try to spot the butterfly hiding in flowers within 10 seconds in this tricky brain teaser.
Did you find the number hiding in the image? Let us know in the comment section below.
