In a 2009 Duke University study, subjects were given 20 math problems to solve in 5 minutes. Then they were given the answers, asked to put their scores through a shredder and report how many they got right to be paid for each correct answer.

The catch is, there papers weren’t shredded.

The average number of correct answers was 7. What was the average number people reported?

The first new player to comment on the website with the correct answer wins a free drink at their next iQ Trivia quiz.