New Delhi, July 18 -- Are you someone who is struggling to meet deadlines? It is a sign that your distractions win over your focus, but we have an easy way to improve your brain's concentration. A new optical illusion has surfaced on the internet, which is helping people to improve their concentration while giving their brains a quick workout. This task can feel easy at first, but make no mistake, it is not as simple as it seems to be.

The puzzle features a grid. Take a closer look at this 12x12 grid; it is full of the number 4321 in every column. They are evenly placed and repeated against a sky-blue background. But there is a catch. An odd number, 4312, is hiding in front of your eyes in one cell of this picture, and your goal is to fi...