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

Our optical illusion today has been designed in a way to bring you a mind-bending puzzle that gives your mind a complete and fun workout — and it is all about how fast you can spot the hidden number, ...

Optical illusions to find hidden numbers challenge the brain's ability to process camouflaged information. With a timer in place, solving these visual illusions also assesses if you are good at ...