Suppose the sixth digit of the UPC number 0 5443x 30250 0 is obscured. What is the missing digit?
A) 0
B) 3
C) 5
D) The missing digit can't be determined.

Question

Quizplus · Accepted Answer

The sum of the digits in the even-numbered positions (0, 4, 3, 3, 2, 0) is 12. The sum of the digits in the odd-numbered positions (5, 4, x, 5, 0) is 14 + x. The total sum of all the digits must be a multiple of 10, so 12 + 14 + x must be a multiple of 10. The only possible value for x that makes this true is 0.

Suppose the Sixth Digit of the UPC Number 0 5443x