12 OLLUSIONS TO TEST YOUR BRAIN If you identify the two images of illusion in 15s, you have a very cultured brain (?) The speed in which you see both the images and the speed in which you pass from one to the other, the faster your brain works the more creative you are. Ready? Here we go! What do you see? Answer A map / a face What do you see? Answer An American native / an Eskimo What do you see?.