AMDM- Universal Product Codes and Credit Card Numbers

AMDM- Universal Product Codes and Credit Card Numbers

1. What does the check digit need to be so that the following UPC will be valid?

48900003782-D

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2. Is the following UPC code valid?

08500001818-7

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3. Is the following UPC code valid?

00498847303-7

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4. Is the following UPC code valid

07385200131-1

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5. Is the following UPC code valid?

08200019298-5

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6. What does the check digit need to be so that the following UPC will be valid?

38748473674-D

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7. What does the check digit need to be so that the following UPC will be valid?

27000892873-D

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8. Show that 4128 0012 4389 0110 is an invalid VISA credit card number.