What is the smallest positive integer x, such that 2160 x is a perfect cube? Pick one.
A) 100
B) 6
C) 8
D) 12
E) 18
Take out the factors of 2160 that will come 6^3*10. for perfect cube you need every no. raise to the power 3. for 2160 to be a perfect cube, you need two 2 and two 5 that means 100   100 is the answer.
<result>A</result>
What is the smallest positive integer x, such that 2160 x is a perfect cube?