Hi Alphonsaj,
When dealing with Roman Numeral questions, it's often easiest to do the opposite of what the question asks (so that you can eliminate answers). Here, we're asked for what MUST be true... so let's try to prove what is NOT always true. We can TEST VALUES rather easily.
IF....
X = 1, the only factor is 1
(1)(13) = 13, which has two factors (1, 13)
So, X COULD be 1.
Roman Numeral 1 is NOT always true.
Eliminate Answers A and D
IF...
X = 2, there are two factors (1, 2)
(2)(13) = 26, which has four factors (1, 2, 13, 26)
So, X COULD be 2.
Roman Numeral 3 is NOT always true.
Eliminate Answers B and E
There's only one answer remaining...
Final Answer: C
GMAT assassins aren't born, they're made,
Rich
When dealing with Roman Numeral questions, it's often easiest to do the opposite of what the question asks (so that you can eliminate answers). Here, we're asked for what MUST be true... so let's try to prove what is NOT always true. We can TEST VALUES rather easily.
IF....
X = 1, the only factor is 1
(1)(13) = 13, which has two factors (1, 13)
So, X COULD be 1.
Roman Numeral 1 is NOT always true.
Eliminate Answers A and D
IF...
X = 2, there are two factors (1, 2)
(2)(13) = 26, which has four factors (1, 2, 13, 26)
So, X COULD be 2.
Roman Numeral 3 is NOT always true.
Eliminate Answers B and E
There's only one answer remaining...
Final Answer: C
GMAT assassins aren't born, they're made,
Rich
