Optical illusion: Only a genius can spot the odd number hidden among a sea of identical "102s"

Up for giving your brain a speedy but exciting exercise? Here's a visual brain puzzle that will actually challenge your observing skills to the fullest. Only razor-sharp concentration and acute eyes for details can solve this number puzzle in 10 seconds!

These type of brain teasers are fun and games--and they present some real brain power benefits, too. Scientists report that deciphering these problems boosts memory, quickens thought processing, and bolsters linking among brain cells. They induce different thinking, creatively, as well as logically.

In today’s number-based puzzle, your mission is simple: spot the odd number hidden among a grid of identical “102s.” Sounds easy? Think again. The numbers are designed to look nearly the same, but one of them is slightly off—and it’s your job to catch it in just 10 seconds!
The challenge includes 8 rows and 8 columns—meaning you’ll be looking through a total of 64 number blocks. Somewhere in this sea of uniformity lies a sneaky imposter. Your brain might feel tricked at first because all the numbers appear identical. But the odd one is there… waiting to be discovered by your sharp eyes.
This type of visual illusion isn't always math—sometimes it takes careful looking, lateral thinking, and excellent pattern recognition. So breathe deep, begin the countdown, and pay attention.

Tick. Tock.

Can you see it?

If you did catch the odd number within the timeframe, congratulations—you've just established your genius-level attention to detail! But don't worry if you're still stumped; even the best minds sometimes miss these visual trickery on the first attempt.

Hint: Go back and review the 6th row and 6th column.

Still can't see it? No worries—scroll down and look at the highlighted answer in the picture below to see just how close you were.