Data sufficiency question:
Is x has only '3' factors? Pick one:
A) 213
B) 278
C) 208
D) 17
E) 101
Only squares of primes has 3 factors. For example, 4 has three factors. 1, 2, 4.   Now when we square 4, we get 16, which has 5 factors. 1, 2, 4, 8, 16. So Statement 1 is sufficient.   Statement two says that one of the factor must be prime number. 10 has 4 factors. i.e., 1, 2, 5, 10 and one of which is prime. but we cannot say whether numbers of this format always have three factors or not. So statement 2 is insufficient.   Answer:278
<result>B</result>
Data sufficiency question:
Is x has only '3' factors?