You have to think "out of the box" to figure this one out!

One Minute Mysteries: At the end of your rope. Used with permission from John Warner and Sandy Silverthorne at oneminutemysteries.com
From the book: The Awesome Book of One-Minute Mysteries and Brain Teasers
Copyright 2009 by Sandy Silverthorne and John Warner
Published by Harvest House Publishes
Eugene, OR 97402