YOU have the eyes of a hawk if you can spot the shoe that doesn't have a pair in this crafty picture in less than ten seconds.
This optical illusion has gone viral online and left most puzzlers stumped.
Viewers are faced with a canvas of about 15 separate shoes – and all but one can be matched up to make pairs.
And it is your job to spot it within ten seconds.
So set your timers but be aware the colour palette in this illustration makes it tricky.
Can you see it?
READ MORE OPTICAL ILLUSIONS
You have the eyes of a hawk if you can spot 10 farm animals in one minute
You have 20/20 vision if you can find the snake in under 15 seconds
If not, do not worry, the answer is circled in the picture below.
If that was too easy, however, why not see if you can find the delicious seedless slice of watermelon among this fruit salad.
In another cunning brain teaser, see if you can spot the hidden heart-shaped berry in less than three seconds.
This optical illusion challenges you to spot the correctly spelt word in less than ten seconds.
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Or, try your luck and spot the rabbit hidden inside this picture in less than five seconds.
If you fancy a trip to colder climates, can you spot the five key differences in these penguin cartoons?
Meanwhile, people have been left baffled trying to spot the odd one out in this picture of peppers.
While you are at it, why not try and spot the odd cow out in the herd.
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