Optical illusion images assess a person’s observation skills and visual intelligence. In this optical illusion challenge, the number 78 is hidden amid the seventies. Can you discover the number in seven seconds? Put your observational abilities to the test now!
Optical illusions lead our visual system to perceive objects that do not exist or to misinterpret what we do see. Many optical illusion visuals are produced by combining objects, colors, and other factors. These pieces are intentionally placed to create false effects, such as making concealed information appear or disappear.
Optical illusions were widely associated with witchcraft, spirits, or supernatural forces in ancient times. Scientists later revealed that these tactics are just a function of our brains’ ability to absorb visual information.
Today’s optical illusion requires you to discover the number 78 in 7 seconds.
Do you have the keenest eyes?
Optical Illusion: Find Number 78

The image above shows a group of 70 people. The number 78 is concealed in plain sight in this photograph. Can you identify the number in seven seconds?
Your time begins now!
Experts believe that people who can solve optical illusion puzzles have exceptional observational skills. They also claim that optical illusions sharpen cognitive abilities, thereby preventing cognitive decline in old age.
Have you found number 78?
Examine all areas of the image carefully; the number 78 is hidden.
Please hurry up.
There is not much time left.
The final few seconds remain…
Have you spotted the number 78?
And…
Time’s up!
How many of you have spotted the number 78?
Congratulations to those exceptional readers who discovered the number 78 within the time limit.
Others who are unable to locate 78 can refer to the solution provided below.
Optical Illusion with Answer
The number 78 can be seen on the bottom right side of the image.

If you enjoyed this optical illusion challenge, be sure to check out our must-try section below for more challenges.
Also, show this to your friends and family to see how quickly they recognize the number 78.