Hi AbeNeedsAnswers,
We're asked if [5^(X+2)]/25 is less than 1. This is a YES/NO question. With certain DS prompts, it can sometimes help to do a bit of set-up work before you work on the two Facts.
Here, we know that 5^2 = 25, so if X=0, then we'd have 25/25 = 1. So the issue here really comes down to whether X is less than or equal to 0. If it IS less than or equal to 0, then the answer to the question will be YES. If X is > 0 though, then the answer will be NO.
1) 5^X < 1
Since 5^0 = 1, with this Fact we know that X MUST be less than 0... so the answer to the question is ALWAYS YES.
Fact 1 is SUFFICIENT
2) X < 0
From our set-up work, we know that this leads to an ALWAYS YES answer.
Fact 2 is SUFFICIENT
Final Answer: D
GMAT assassins aren't born, they're made,
Rich
