You will have the eyes of a hawk if you spot the hidden blueberry within 30 seconds

Fancy a little challenge to get your brain working? Give this brainteaser a try, but be warned: it's not as easy as it seems.

The record for this challenge is only 30 seconds, so if you can beat it, you'll have the eyes of a hawk.

The tricky puzzle was shared by Betway – and all you have to do is find the extra blueberries in the piles on pancakes.

Sounds simple enough, right?

Think again: the brainteaser has left people scratching their heads over the struggle to spot the stray blueberry.

There are 43 stacks of pancakes in total, which takes a lot of work from the brainteaser.

Press play on the video above to start the timer and see if you're the champion of the challenge.

Need help? You won't find the extra blueberries on top of the stacks of pancakes, they're hidden between the layers.

Ready for the answer? Watch below and put your friends and family to the test.

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Want another one to keep your mind busy?

All you have to do is extract the password from the encrypted letters.

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Four of the letters are already in place, so you only need to place six.

You also have 30 seconds for this challenge.

The brainteaser was created by Earth web and is the perfect challenge to test your mind.

You'll be fooling yourself when you realize the word, if you haven't guessed it yet.

Ready for the answer? Scroll down to see the password.

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