When 21 is divided by the positive integer k, the remainder is 3, for how many different values of k is this true?	Choose the correct choice from the following options.
A) 1
B) 2
C) 3
D) 4
E) 5
This means that 18 must be a multiple of k.   The factors of 18 are 1, 2, 3, 6, 9, and 18.   Out of these, k can be 6, 9, and 18.   The answer is 3.
<result>C</result>
When 21 is divided by the positive integer k, the remainder is 3, for how many different values of k is this true?