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# Determine the check digit for the Avis rental car with

ISBN: 9781133599708 52

## Solution for problem 44E Chapter 0

Contemporary Abstract Algebra | 8th Edition

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Problem 44E

Determine the check digit for the Avis rental car with identification number 540047. (See Example 5.)EXAMPLE 5 Airline companies, the United Parcel Service, and the rental-car companies Avis and National use the mod 7 values of identification numbers to assign check digits. Thus, the identification number 00121373147367 (see Figure 0.2) has the check digit 3 appended to it because 121373147367 mod 7 5 3. Similarly, the UPS pickup record number 768113999, shown in Figure 0.3, has the check digit 2 appended to it.

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