Mathematical Recreations; March 1997; Scientific American Magazine; by Stewart; 3 Page(s)

About a year ago Ian Porteous, a mathematician at the University of Liverpool, told me about an elegant game. His son, Richard Porteous, invented it to teach children about multiplication and division. The game is called Juniper Green, after the school at which Richard taught. It is fun to play, and the search for a winning strategy is quite challenging.

To play Juniper Green, you should make 100 cards, numbered 1 through 100. Lay them face up on the table in numerical order, say, 10 rows of 10 cards each, so that it will be easy for players to locate the desired card.