New Delhi, Aug. 29 -- Optical illusions are spreading like wildfire on the internet, including social media platforms. Given their unique ability to test our observation skills, these brain teasers have become a favorite pastime for many across the world. If you like brain teasers, we have the perfect challenge to put your IQ to the test.

All you have to do is find the number 28 in this grid of 82s. While it appears easy, only people with sharp eyes were able to get this done within just 10 seconds of their time.

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At first glance, the picture seems to contain a grid of the number 82. It seems like the number occupies every nook and crann...