450y = n^3Akansha wrote:n and y are positive integers and 450y = n3, which is an integer?
y / 3 * 22 * 5
y / 32 * 2 * 5
y / 3 * 2 * 52
a. None
b. I
c. II
d. III
e. I, II, III
OA is B
I had difficulty in understanding this question. Need help.
450 = 2 * 3² * 5², so 2 * 3² * 5² * y = n^3
For the above equation to be true, y = 2² * 3 * 5 (since the right hand side is the power of 3)
So, I is true.
The correct answer is B.
