CHECK CODES AND DIGITS

Question 1

is mainly used in products sold in department stores and groceries. The UPC consists of barcodes with 12 digits where the last one is the check digit

Answer 1

Universal Product Code (UPC),

Question 2

is used on books where usually found at the last page of the book. ISBN can be ISBN-10 or ISBN-13 where they used 10 digits or 13 digits string of number respectively with the last digit as the check digit.

Answer 2

International Standard Book Number (ISBN)

Question 3

is consist of 11 digits,

Answer 3

United States Postal Services (USPS)

Question 4

uses 16 digits

Answer 4

Credit Card