YOU might have a high IQ if you can work out which of the two women will get more water in 11 seconds.
Only those with incredible observational skills will be able to pick the right answer.
That's because brainteasers like this are for people who enjoy challenging their creative thinking with fun games and puzzles.
In this particular instance, two women are carrying two buckets by the river.
The woman at the front has two wooden buckets, while the women behind her has a metal bucket.
The main thing you can learn from this puzzle is how your brain and vision coordinate.
TRY YOUR LUCK WITH THESE
Optical Illusion Benefits
RESEARCHERS have developed many tests that show how various brain regions react to optical illusions.
By giving your brain a little workout on a regular basis, you enhance your ability to focus and observe details.
Studies have shown, people who regularly challenge themselves with optical illusions and puzzles see big improvements in their problem-solving skills, concentration and attention.
Improved concentration and attention span, in turn, can help prevent cognitive decline in older age.
Psychologists at The University of Glasgow found that staring at an optical illusion can improve eyesight by allowing you to see small print.
Optical illusions are created to trick our minds into perceiving things that don't correspond to physical reality.
Figure out what's wrong with this image of smiling women sitting on a couch as you try to count their legs.
Prove yourself a genius if you can solve where the strawberry is hiding in the carnival scene in less than nine seconds.
Lastly, spot the hidden number amongst the coloured dots in just seven seconds if you have 20/20 vision.
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Back to our challenge - have you worked it out yet?
Take a look at the whole photo and scan it for any details that could give you the answer.
Have you worked it out? Are you sure it's the right answer? We've included the solution below.
If you guessed the woman with the two smaller buckets, congratulations, you are correct.
While the first woman has larger buckets, on closer inspection one of the buckets has a hole in the bottom, which makes her unable to carry two full buckets of water.
If this challenge was too easy for you, however, then why not try out one of our other tricky optical illusions?
We've added three more for you to have a go at.