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Visit this site: http://www.maa.org/mathland/mathtrek_10_19_98.html

Author:Ivars Peterson (MathTrek)
Description: Some states use complicated schemes for establishing driver's license identification numbers. The numbers may include check digits to detect errors or fraud, or they may encode such personal data as the month and date of birth, year of birth, and sex. In several instances, however, the coding strategy is secret. Breaking those license codes has proved an irresistible challenge for Joseph A. Gallian, a mathematician at the University of Minnesota in Duluth...

Levels: Middle School (6-8), High School (9-12), College
Languages: English
Resource Types: Articles
Math Topics: Number Sense/About Numbers, Sequences and Sets, Cryptography

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