At first glance, a uniform array of the number '1' offers little intrigue, but delve deeper and you'll reveal a lone letter ...

Optical illusions like this one to find a hidden number exploit your visual processing system and brain's ability to make assumptions in the absence of complete information. But if you possess sharp ...

Optical illusions to find hidden numbers are usually a great way to exercise your brain. These visual illusions present you ...

Only those with sharp minds will spot the hidden number in this optical illusion ...