A new viral optical illusion is having the internet pause and look twice. The puzzle is asking viewers to find the number 181 hidden in a big grid of 191, and players have to do it in five seconds.

A tricky number puzzle has left thousands of people scratching their heads online, with experts claiming that only a genius can figure out the next number. The challenge comes from the famous look-and ...

Test your cognitive skills with this tricky number puzzle designed to challenge your pattern recognition and logic. Created by Tombola, this brain teaser requires you to find the missing number in a ...