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Peer reviewedGallian, Joseph A.; Winters, Steven – American Mathematical Monthly, 1988
Several schemes use modular arithmetic to append a check digit to product identification numbers for error detection. Some schemes are discussed, including ones for money orders and library books. Then a foolproof method is presented. (MNS)
Descriptors: College Mathematics, Error Patterns, Higher Education, Mathematical Applications
Peer reviewedGallian, Joseph A. – College Mathematics Journal, 1991
Discussed are the mathematical methods for detecting a variety of common error patterns within the bar-coded identification numbers utilized in conjunction with scanning devices. Schemes for the use of check digits are examined that ensure conditions for detecting errors of specific types, including single digit error, transposition error, twin…
Descriptors: College Mathematics, Error Patterns, Higher Education, Learning Activities
