Optical illusions can cleverly determine a person's personality traits and skills as they test their mind to think outside of the box in order to solve tricky illusions.
A new puzzle is said to test a person's IQ by asking that they spot a sad panda hidden amongst happy pandas within a very tight timeframe.
While it may seem relatively simple at first, you only have 10 seconds to find the anomaly hidden somewhere within the mind-boggling image.