JMU



Practice Exercises 2

1.- Find the correct UPC for Celestial Seasoning Ginseng Plus Herb Tea?

0 71734 00021 8

0 70734 00021 8

0 70743 00021 8

2.- Find the check digit for RealLemon Juice

0 53000 15108 ░

3.- The International Standard Book Number (ISBN) is a 10 digit code used to uniquely identify a book. These 10 digits are used to identify the language in which the book is written, the publisher number, the number assigned by the publisher to the book, and a check digit. The check digit is the last digit of this sequence. The check digit may be any one of the digits (0 through 9) or an X which stands for 10.

The check digit is chosen such that

1d1 + 2d2 + 3d3 + 4d4 + 5d5 + 6d6 + 7d7 + 8d8 + 9d9 + 10d10 ≡ 0 mod 11

Find the check digit for the The Art of Computer Programming: Fundamental Algorithms by Donald E. Knuth published by Addison-Wesley Longman. Vol. 1. 3rd Edition. 1997. The first nine digits are: 0-201-89683-░.

4.- Find the missing digit of the following ISBN number: 0-07-2░2434-6.

5.- Find the check digit for the following bank codes:

31061483░

02571108░

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