Determine the check digit that should be appended to the delivery point Postnet code for a letter going to 345 Main Street with ZIP+4 code 39021-4200.
A) 0
B) 1
C) 5
D) 9

Question

Quizplus · Accepted Answer

The check digit is calculated by summing the digits of the ZIP+4 code (3+9+0+2+1+4+2+0+0 = 21) and finding the number that, when added to this sum, results in a multiple of 10. The next multiple of 10 after 21 is 30, so the check digit is 30 - 21 = 9. However, the correct check digit is 0, as the sum of the digits is already a multiple of 10.

Determine the Check Digit That Should Be Appended to the Delivery