What is the smallest positive integer x, such that 1944x is a perfect cube?  Choose the correct choice from the following answers:
A) 4
B) 3
C) 8
D) 12
E) 18
Take out the factors of 1944 that will come 2^3*3^3 *3^2. for perfect cube you need every no. raise to the power 3. for 1944 to be a perfect cube, need 1 3 that means =3   3 is the answer.
<result>B</result>
What is the smallest positive integer x, such that 1944x is a perfect cube?