India, May 4 -- Social media continues to be a treasure trove of diverse content-ranging from laugh-out-loud memes to thought-provoking facts. But recently, one genre in particular has captivated users: optical illusions. These brain teasers have become a favourite pastime for those who enjoy a good challenge, and this particular puzzle has left people utterly perplexed.

(Also read: Think your eyesight is perfect? Count all the cats in this tricky optical illusion to prove it)

American singer Macy Gray shared a curious image on Facebook that's now doing the rounds online. The post features a visual puzzle made entirely of watermelon slices arranged in a square pattern. The caption claims, "99% will fail this," and poses a seemingly simp...