These types of optical illusions can be challenging but fun at the same time. I had my son helped me with this project, after moving the circles around, he lost track of the answer himself.
Take a close look at these circles and see if you can find 4 circles which are not linked together. Share with your friends on social media to see if they can find the answer too.
Like us on Facebook for more fun brain teaser games like this one.
Photo edited by: itoptopics