The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common?
Pick:	A) 10 and 30	B) 12 and 18	C) 24 and 64	D) 21 and 63	E) 22 and 44
64 has only the prime 2 (64=2^6) in its prime factorization, so it can not have a PAIR of distinct prime divisors in common with ANY of the numbers.   The answer is 24 and 64.
<result>C</result>
The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common?