The last digit of a five-digit identification number is the check digit. The check digit is assigned so that the sum of all the digits is divisible by 7. Only the digits 0 through 6 will be used in the identification numbers.
a. Under this scheme, how many valid identification numbers are possible?
b. Suppose a single-digit error has been made in the number 36253, but the check digit is correct. Correct the number in as many ways as possible.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.