Editor's Note (1/3/19): The top-left shape in question number 8, “Taking Shapes,” should have given a value of 22, not 24.
Credit: © 2017 American Mensa, Ltd., Learn More at http://americanmensa.org/join
This article was originally published with the title "Head Games" in SA Mind 28, 1, 74 (January 2017)
doi:10.1038/scientificamericanmind0117-74
