Only 1% of people can spot the hidden mistake in basic clock face image

Dust off your analytical skills and get your specs on - it's time to take on a deceptively difficult brainteaser that leaves most Brits utterly stumped.

Puzzlesmight seem like a mere distraction from your gruelling commute, or a fun way to get competitive with your family. But, research has shown regularly solving brainteasers like this one can actually have a positive impact on the central nervous system. This could result in a slew of cognitive improvements including greater attention span and concentration levels.

However, this particular puzzle is so tricky it may also leave you wanting to pull your hair out. Seriously, you'll need a razor-sharp mind and eagle eyes to crack this one before the timer runs out! So, what are you waiting for?

READ MORE: You've got eagle-eyed vision if you can spot random number among OOOs

The image above depicts a traditional watch face, complete with a brown leather strap. At first glance, everything appears as it should, with the Roman numerals clearly visible. But all is not as it seems.

In fact, there's a glaring error in the picture, and participants have a mere 11 seconds to spot it. As previously reported, only one per cent of people can identify the mistake within the given time, leaving 99 per cent falling short.

We're not giving away any clues on this one, but zooming into the image may help you find the errors quicker. If you're still feeling completely stumped, scroll down to the bottom of the article to reveal the answer.

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If you solved that clock-themed brainteaser without even breaking a sweat, it's clear we need to ramp things up a notch. So, below is a impossibly tricky riddle that's bound to catch you off guard - and you have only got 15 seconds to solve it.

Once the timer is up, you can check your answer here - but no cheating! And once again, you're not getting any help from us...

"Mrs. Watt has 5 children. The oldest four children's names are Lala, Lele, Lili, and Lolo," the riddle reads. "What is the name of the youngest child - why do people laugh at her name?"

You might have jumped the gun and quickly guessed that the child's name is Lulu, because the first four children have the same name with different vowels - and 'U' is the last one available. However, this is not the right answer. Feeling stuck? Thought so!

Up for another mental workout? Check out our collection of tricky brainteasers, riddles, and puzzles here. Or, learn more about your hidden personality traits with these mind-boggling optical illusions.

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