Data Sufficiency (DS) | Re: If r and s are positive integers, is r/s an integer?

If r and s are positive integers, is r/s aninteger?

(1) Every factor of s is also a factor of r. If every factor ofs is also factor ofr , then in fractionr/s ,s will just be reduced and we get an integer. Sufficient.

(2) Every prime factor of s is also a prime factor of r. The powers of prime factors ofs could be higher than powers of prime factors ofr . eg 25/125=1/5 not an integer. Not sufficient.

Answer: A.

Hope it'sclear.