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The Spirit of Discovery: The Digital Roots of Integers

Eric Milou, Jay Schiffman 

December 2007, Volume 101, Issue 5, Page 379

Abstract:
Article compels students to analyze patterns and formulate conjectures in the spirit of discovering mathematics. Ideas such as the multiplicative digital root and multiplicative persistence as well as connections to probability and statistics and number sense are included. Sample solutions and data collected from posing the problem in a college level class are provided.

Keywords:
Article
Grades 9-12
Connections / Applications
Teacher
Problems
Multiplication and Division
Number Patterns