A new optical illusion is putting people’s eyesight - and patience - to the test. The challenge looks simple at first glance: a full grid of the number 349 repeated over and over. But hidden somewhere ...

Optical illusions are the latest trend on social media. The latest puzzle to go viral is an easy 'find the number' game, where players have been asked to identify the hidden number 38 in this viral ...

A colourful line pattern hides a secret number in this optical illusion puzzle. Look carefully and see if you can spot it in ...

Optical illusion puzzles test your brain's ability to recognise patterns quickly and efficiently. Solving visual illusions to find the hidden numbers can reveal your visual acuity, attention to detail ...