Project Management

http://commons.wikimedia.org/wiki/File:Chodowiecki_Basedow_Tafel_20_a.jpg

A puzzle by Polish mathematician Paul Vaderlind:

If a blacksmith requires five minutes to put on a horseshoe, can eight blacksmiths shoe 10 horses in less than half an hour? The catch: A horse can stand on three legs, but not on two.

Click for Answer