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so we know that N^2 has prime factors, 2,3 and 5..but we dont know if N is an integer or not...N cud sqrt(30)..Insuff

(2)..well everyone else explained why it isnt suff...

C..together..cause (2) tells us that N is an integer and has definetly prime factors 3 and 5...statemnet confirms that N has 2, 3 and 5 as prime factors...thus togehter they are sufficient..

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

if n= 15 , then from St2, 30 is factor of 30, but 30 is not a factor of n (15) or n^2 ( 225). Only if n = 30, 60, 90 then n is factor of n^2 and n and also satisy statement 2.

Since from both statements you can not get a clear yes/ no answer, it must be E