A Social Security number is a sequence of nine digits. How many Social Security numbers are possible that have the same first 5 digits ?
A)10,000 numbers
B) 40 numbers
C) 50 numbers
D) 1,048,576 numbers
E) 100,000 numbers

Question

A Social Security number is a sequence of nine digits. How many Social Security numbers are possible that have the same first 5 digits  ?
A)10,000 numbers
B) 40 numbers
C) 50 numbers
D) 1,048,576 numbers
E) 100,000 numbers

Quizplus · Accepted Answer

The last four digits can vary, and since each digit can be any number from 0 to 9, there are 10^4 = 10,000 possible combinations for the last four digits.

A Social Security Number Is a Sequence of Nine Digits