Spotting the difference between two paired photos have been a long time favorite. People think it is really easy to spot the wrong details given in the pictures that can vary from small to the most obvious ones.
The intellect of the person will give sensitivity to the eyes when spotting for details. Which means that the higher IQ you have, the more easy it is for you to find differences since your brain will automatically scan for things out of the ordinary.
Its work is to spot what it thinks is wrong and that should make the game pretty easy. Want to try it out?
1. Let's warm up a little bit. List on the differences you can see on this picture.