Brain teasers and optical illusions are a fantastic way of improving your cognitive abilities, and training your brain to work on more complicated puzzles over time is great for boosting brain power.
And if you're on the hunt for a new challenge to set your mind to, why not try out this optical illusion-style puzzle that's been leaving some scratching their heads in confusion? All you have to do is find the number hidden among the polka dots. Sounds simple, right? Give it a go!
At first glance, the picture seems to just be an array of yellow polka dots on a background that's a slightly lighter shade of yellow than the dots themselves, the Mirror reports.
