Spot-the-difference puzzles are not only fun but also a great way to keep your mind active, making it one of the best ways to improve cognitive functions. Here today, we have the lovely picture of a wolf and a sheep paddling down the river. These two may seem to be the same at first glance, but four slight variations might puzzle your brain. Look them closely and tell!When you work on puzzles like this, in a way, you are exercising your brain. The visual cortex, which processes the visual input, would have lit up when you have spent a little time staring at the picture and seeing things out of place. Furthermore, your prefrontal cortex, which is tasked with decision-making and problem solving, automatically lights up as you draw the line and reflect on it. This helps to exercise better eye on detail and intensifies concentration capacities, both of which are integral requirements for mental sharpness.These cognitive puzzles, apart from developing functions, are also found to reveal aspects of your personality. If you spot all the differences within seconds, then it means you have a good ability to concentrate and acute eyesight. If you take little time, then do not panic; patience and persistence for problem-solving is very worthwhile.