Data Sufficiency

Is 30 is a factor of n?

(1) 30 is a factor of the square of n
(2) 30 is a factor of 2n

OA - C

(1) 30 is a factor of the square of n
if n is an integer then this must be true
but if n is a decimal containing sqrt(3)*sqrt(5)*sqrt(2)
then this is false
INSUFF

(2) 30 is a factor of 2n

30 may not be a fcator of n i.e n only has 5,3 as factors,2n introduces the 2

INSUFF

together

then n cannot have sqrt(3)*sqrt(5)*sqrt(2) i.e n must be an integer so

30 is a factor

C