math
posted by AL .
N and P are integers greater than 1
5N is the square of a number
75NP is the cube of a number
the smallest value for N+P IS what?
i cant figure it out, please help
thank you so much

5N is a square: squares: 4,9,16,25,36,49,64,81,100,...
Now which of those are divisible by five?
now look at cubes. 8,27,64,125,256,...15^3
which of those are divisible by 75?
so if N is 5, and 75*5*P=15^3
then P is 9 
thank you so much