Puzzling Number Mazes Author:Lee Daniel Quinn 48 computer-generated brain teasers, with numbers as themes. "Triskaidekaphobia" (abnormal fear of the number 13) asks puzzlers to accumulate 13 points as they work their way through a labyrinth; in "Six Days to Make the World," players must touch six points while moving from top to bottom of a maze. Many more, all with captions and solutions.