EVERYONE can see four glasses but can you figure out which one is holding more water?
Players who solve this tricky optical illusion in less than 12 seconds could have 20/20 vision.
There are four glasses in this image with different objects inside.
The water level of each one seems to be the same but can you use your mental skills to figure out which one has more liquid?
These cups contain a pair of scissors, a paper clip, a rubber, and a watch.
Each glass would have a different amount of water left if these items were removed, but can you work out which one is correct?
Puzzles like this can help improve people's observation skills as well as be entertaining.
Optical illusions require complete focus and strong critical skills to make sure players solve these in time.
Picture puzzles can also help readers improve their visual observations.
These tasks could boost peoples IQ's and problem-solving skills.
Here is a clue for players who are struggling against the clock.
Compare the size of each item and think about how they would look outside of the glass.
If you are still stuck here is a second hint.
Ignore the order of the glasses as this could confuse players.
Do not worry if you have run out of time as the answer to this tricky puzzle is down below.
Why not test your brain even further with another mind-boggling optical illusion.
Everyone can see the family but can you spot the hiding duck and bat.
Players have just 12 seconds to figure out this mind-boggling puzzle.
Players who can quickly solve this task could have 20/20 vision.
People will have to look past the father and his two children to make sure they find these animals.
Here is a clue for people running out of time.
Look around the dogs feet to see if you spot anything interesting.