If k^3 is divisible by 1620, what is the least possible value of integer k?  Select
A) 12
B) 30
C) 60
D) 90
E) 120
1620 = 2^2*3^4*5   Therefore k must include at least 2 * 3^2 * 5 = 90.   The answer is 90.
<result>D</result>
If k^3 is divisible by 1620, what is the least possible value of integer k?