Riddles that challenge us to spot differences between 2 similar images activate our concentration power to the maximum: they put our eyes and brain to work. This is great because training our minds is as important as exercising our muscles.

Spotting the difference can be a frustrating exercise at the best of times, but this game is extra tough. The series of seemingly identical photos all contain a few subtle differences, and some are almost impossible to spot. So Find the differences in this picture.

IQ, short for intelligence quotient, is a measure of a person’s reasoning ability. Many colleges and universities also use exams similar to IQ tests to select students. Here is the answer!