A leading educational site has published a school-themed optical illusion that it claims only one in 10 people can solve in less than 13 seconds.
The puzzle shows a typical classroom scene with a bell hidden among its busy scene.
The twist? The puzzles only have a short period to find it.
Visual challenges, such as noticing the difference between two images or recognizing patterns, are often part of IQ assessments, a series of standardized tests used to assess intelligence.
These puzzles are often timed, and the IQ test from Mensa, an organization for people with exceptionally high IQs, challenges people to solve 35 increasingly difficult visual puzzles in just 25 minutes.
Test your visual acuity with this week’s visual challenge. Can you spot the bell in 13 seconds? The answer to the riddle is circled in the image below.
The puzzle shows a typical classroom scene, but with a hidden bell and the detail that players only have a short period to find it.
Did you manage to find the bell within the time limit?
The puzzle published by Josh Jagran this week has a single bell on display in the busy library scene.
As with many optical illusion puzzles, there are a couple of “decoy” details that look a lot like a bell, such as the yellow backpack of the student furthest to the right of the frame.
But the real one is very obvious once you spot it.
Don’t worry if you can’t complete the task.
Jagran Josh has tips to help: Limit distractions. Silence your technology and focus solely on the image.
Additionally, you can zoom in and look at it in sections to take a closer look at its elements.
Humans have been creating optical illusion art since the dawn of history.
Research in 2010 found that Paleolithic cave artists in several caves in France deliberately confused woolly mammoths and bison in a manner similar to a famous duck and rabbit optical illusion.
And the ancient Greek philosopher Aristotle reported the optical illusion of the “side effect of motion” after observing waterfalls.
This visual illusion occurs when a stationary object appears to move in the opposite direction to the moving object you had previously been observing.
In the 19th century, the invention of photography and devices such as the stereoscope boosted the study of visual illusions.