Our brains love to exercise. We’re biologically engineered to be rewarded by challenges and to even seek them out.
When we get a puzzle right, or solve a problem, or find a hidden object or letter, we get a nice little pump of dopamine, which is one of the feel-good chemicals in the brain. In the image below, you’ll see a bunch of Xs and one Y. If you can find the Y within 60 seconds, you probably have an above-average IQ. If you can’t find it, scroll on down for the solution. But give it your best shot first.