Want to take a Mensa intelligence test? Here are four practice questions
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In the middle of the 20th century, high marks on IQ tests became status symbols. Mensa members have the pins to prove it.

Enrollment in the society, founded in 1946, is open only to individuals who score in the 98th percentile or higher on a pre-approved intelligence test. To join this clever club, hopefuls must demonstrate excellence in verbal-, spatial-, and mathematical-reasoning skills. These four problems are what today’s aspirants might see on a typical IQ assessment.

This article was originally published in the Spring 2018 Intelligence issue of Popular Science.