NO this is 12...what are you guys talking about??
so lets look at 72=2^3*3^2
n^2 prime factors are 2^3 . 3^2
now if N= sqrt(n^2)=2^3/2 * 3
now we all noe there is no such number as 2^3/2...i.e 2^1.5...so we need 2^2...
the least number possible is 2^2*3=12;
B it is...this is how you solve these problems....
the number could range from 12 to .... what is OA?
Nope, as Apollo just demonstrated, the number has to be divisible by 3^2. 48 won't work.
The OA has been proven.
Unlike verbal problems, we can confirm answers in the math forum