Optical illusions are the best if you love to challenge your mind. There are several optical illusions available over the internet that you can try and challenge yourself. In this image, there are three cats and the challenge is to find the fourth cat which is hidden. The image was shared by an Instagram account named "sarcastic_us". "Did you find all of them," the image has been captioned.
In the picture, we can see three black cats staring directly at the camera. Finding the fourth cat, hidden in this picture where three prominently visible cats are there is a bit difficult. Those who attempt optical illusions regularly and also those who know how cats are might start looking for the fourth cat closer to the three cats. But, that is not the case. Finding the last cat is what makes this challenge tougher.