Your task is to find the hidden number sequence within 39 seconds. No you need to know that this is not about guessing but training your visual focus. Optical illusion puzzles are often used as ...

New Delhi: In a development that has stirred the mathematical world, two researchers have taken a route to unlock hidden patterns in prime numbers – one that blends old wisdom with unexpected tools.

A quick optical illusion puzzle that tests attention to detail and visual focus by asking readers to find a hidden odd number.