algebra 2
posted by Terri on .
Find the set of all integers, n, for which the fraction
20/(10n*n) is an integer
I used n*n for n squared
I figured that 10n*n must be a factor of 20 and the only answer that ended up working was +3, is this right?

20/(10 n^2) must be 20, 10, 5, 4 , 2 or 1, with n an integer.
n can only be +/ 3 or 0.