Testing a person’s intelligence has a long, dark history. In the past, scientists even used the measurements of a person’s skull to try and denote how clever they were.
Although it’s now seen as rather outdated, the IQ (or “intelligence quotient”) test is still a well-known way to test your brains. But one 1950’s IQ test has recently gone viral for its truly tricky questions. Can you get all 5 right?