Expanding Minds / Increasing Performance

This week we are posting  5 "Insight Problems" one for each day of the work week.

Monday February 21, 2011, First Day

Todays problem is:

A man in a town married 20 women. He and the women are still alive, and he has had no divorces or annulments. He is not a bigamist (meaning he is not legally married to more than one woman at once), and he broke no law. How is that possible?

(Baker-Sennett & Ceci, 1996; Jacobs & Dominowski, 1981; Schooler & Melcher, 1995).