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GMAT PREP 2 - Algebra

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by under_net » Sat Oct 03, 2009 5:08 am
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Super Confused on this one..... Please explain..

May be im not selecting the right value for X.

OA : E
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Re: GMAT PREP 2 - Algebra

by Brent@GMATPrepNow » Sat Oct 03, 2009 6:40 am
under_net wrote:Image

Super Confused on this one..... Please explain..

May be im not selecting the right value for X.

OA : E
First try an even number, say 2 and see which answer choices you can eliminate (i.e., see which answer choices yield an even number)

When we plug in 2 for x, we can eliminate B, C and D, which leaves us with A or E.

Now try another value for x. How about x=4.

When we replace x with 4, we see that A is an even number, which leaves us with E (which yields an odd number).
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Re: GMAT PREP 2 - Algebra

by under_net » Sat Oct 03, 2009 7:26 am
Brent Hanneson wrote:
under_net wrote:Image

Super Confused on this one..... Please explain..

May be im not selecting the right value for X.

OA : E
First try an even number, say 2 and see which answer choices you can eliminate (i.e., see which answer choices yield an even number)

When we plug in 2 for x, we can eliminate B, C and D, which leaves us with A or E.

Now try another value for x. How about x=4.

When we replace x with 4, we see that A is an even number, which leaves us with E (which yields an odd number).
Hey Thanks Brent.... I was just checking everytime against single even value for X. That was creating the confusion.
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