PREP-III, Easy but a bit tricky

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race2mba: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Thu Nov 15, 2012 8:53 am; Thanked: 1 times

by race2mba » Thu Jul 04, 2013 6:01 pm

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Source: Beat The GMAT — Problem Solving | Thu Jul 04, 2013 6:01 pm

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by [email protected] » Fri Jul 05, 2013 7:14 pm

Hi race2mba,

This question is actually a great example for the EMPOWERgmat strategy TEST IT. Since we're told that X CAN'T = 0, we can make X anything else.

Let's choose X = 2

When you plug in 2, you'll end up with 2/2 = 1
Answers C and E both match, so it has to be one of those two answers

Now let's choose X = -2
When you plug in -2, you'll end up with 2/-2 = -1
Since we narrowed it down to C and E earlier, the only answer that matches is E!

Final answer: E

The EMPOWERgmat course has an entire section and series of Modules devoted to this straight-forward strategic approach. Since this tactic works on up to 2/3 of Quant questions, it's really a "must have" if your goal is a 700+.

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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