Suppose an American Express Travelers Cheque is numbered x483920594, where the first digit is obscured. What is the missing digit?
A) 1
B) 6
C) 8
D) The missing digit can't be determined.

Question

Quizplus · Accepted Answer

The missing digit is 1. The sum of the digits in the even positions is 4 + 8 + 9 + 2 + 5 + 9 = 37. The sum of the digits in the odd positions is 1 + 3 + 0 + 4 = 8. The difference between the two sums is 37 - 8 = 29. The missing digit must be 1 in order for the difference to be divisible by 11.

Suppose an American Express Travelers Cheque Is Numbered X483920594, Where