Unit 1- Credit Card/UPC Code Validity
Flashcard
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What verifies an identification number has been entered correctly into a system?
Back
Check digit: A digit added to a number to ensure its validity and correctness.
2.
FLASHCARD QUESTION
Front
Calculate the check digit for the UPC Code: 7-22252-11004-?
Back
Check digit: 2. The check digit is calculated using a specific algorithm based on the preceding digits.
3.
FLASHCARD QUESTION
Front
How do you verify if the check digit for a credit card is correct?
Back
To verify, use the Luhn algorithm, which checks the validity of the credit card number.
4.
FLASHCARD QUESTION
Front
Is the UPC code 7-22252-11004-6 valid?
Back
Yes, it is valid. The check digit confirms the integrity of the UPC code.
5.
FLASHCARD QUESTION
Front
What is the check digit for the following credit card: 4551 6546 7890 468d?
Back
Check digit: 9. This is determined using the Luhn algorithm.
6.
FLASHCARD QUESTION
Front
Define UPC Code.
Back
Universal Product Code (UPC): A barcode symbology used for tracking trade items in stores.
7.
FLASHCARD QUESTION
Front
What is the purpose of a check digit?
Back
The purpose of a check digit is to detect errors in identification numbers.
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