UPC Investigation

  1. Determine the check digit, D, for the UPC number 38137009213D.
  2. Show that 0-52200-48826-5 is an invalid UPC Code number.
  3. If someone made a single-digit error in entering this invalid number, can you tell which digit is incorrect? Why or why not?
  4. Change one digit (not the check digit) in this invalid number so the resulting number is valid.

UPC Investigation