An optical illusion shared on Facebook challenged viewers to count hidden faces in a black-and-white silhouette.

People have been left scratching their heads over an optical illusion so confusing 'only 10% of the world's population can solve it.' Shared on social media, the image has sparked a debate as ...

Social media is flooded with brain-teasing optical illusions. One viral challenge involves finding a hidden 'HORSE' in an image of a horse. With only 10 seconds to solve it, many struggle, but those ...

However, there’s a sneaky "10" cleverly placed somewhere in the design, and only the most eagle-eyed viewers can spot it.

(Facebook/Dreame) (Also read: Optical illusion: Only 1 in 100 people can spot the hidden dog in this image within 10 seconds) A brain teaser shared on Facebook by an account named 'Dreame' has ...