Determine the check digit that should be appended to the UPC identification number 0 13500 47501.
A) 0
B) 2
C) 3
D) 8

Question

Quizplus · Accepted Answer

The check digit for a UPC code is calculated using a specific formula. First, add together the digits in the odd-numbered positions (counting from the left, starting with 1), then multiply this sum by 3. Next, add the digits in the even-numbered positions to this product. The check digit is the smallest number which, when added to this result, produces a multiple of 10. For the UPC 0 13500 47501, the calculation is as follows: (0+3+5+0+7+0) * 3 + (1+5+0+4+5+1) = 45 + 16 = 61. The smallest number that can be added to 61 to get a multiple of 10 is 9, making the check digit 9, not 0, 2, 3, or 8. My previous response contained an error in the calculation process.

Determine the Check Digit That Should Be Appended to the UPC