Math Solve

GRE Quant Problem Solving
1

let s be the set of all positive integers n such that n squared is a multiple of both 24 and 108. which of the following integers are divisors of every integer n in s. indicate all such integers
[a] 12
[b] 24
[c] 36
[d] 72

Here, Greg told that the answer will be 12 and 36. However, I think 72 should also be a result. Please clarify me.

2
3

I think D should also be one of the answers.

4

I think there is a discussion on the link above which clarifies why D is not the answer