Only those with top IQs can find the odd hand out in this impossible brainteaser

Find out if you're worthy of a Mensa membership with this utterly baffling brainteaser that needs to be solved in 19 seconds or less. If you're real genius - try and defeat the record time of just 10 seconds

Figure out whether you're the next Einstein with this baffling brainteaser.

Created by online language learning provider Preply to spread awareness of sign language and how it can connect people together, this puzzle is bound to leave you feeling a little stumped. You'll need to stay calm and unflappable while you race against the clock, and will need the IQ of a modern day genius to come out victorious. Think you've got what it takes?

Fiendish games like this aren't just a great way to flex your intelligence, get competitive with your friends and family, or occupy the time during those gruelling commutes. Research has actually shown multiple health benefits in regularly engaging with brainteasers - including improved attention span and better concentration levels.

The image above shows a bunch of hands that all spell out the phrase 'I love you' in American Sign Language (ASL). However, hiding in plain sight is one odd hand that you need to find in just 19 seconds or less to prove you have the IQ of a proper smarty pants.

If you're serious about that Mensa membership, aim for the record of solving this puzzle in just 10 seconds. We're not giving you any clues for this one, but if you're struggling - zooming in on the image might help!

Admitting defeat already, or reckon you've cracked it in the nick of time? Scroll down to the bottom of the article to find out the answer.

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If that tricky brainteaser was no match for boffin like yourself, it's time to take things up a notch. Created by the Government Communications Headquarters (GCHQ), you'll have to have the sharpest analytical skills and the mind of a top spy to crack this puzzle. GCHQ might label this puzzle 'family-friendly' but don't be fooled - there's nothing easy about it.

Of course, you get no clues when trying to save the world from evil and should be able to solve the puzzle in less than 30 seconds. So, get your 007 thinking caps on and let's see just how quickly you can work out which is the odd word or phrase from the list below. Once you're done, you can check your answer here.

• Catwoman
• Deus Ex Machina
• Parishioner
• Pyromania
• Scuba

Up for yet another challenge? Check out our entire 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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