• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Reach higher with Artificial Intelligence. Guaranteed
Now free for 30 days

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

## gmat prep question

This topic has 4 member replies
yvonne12 Master | Next Rank: 500 Posts
Joined
07 Feb 2007
Posted:
144 messages

#### gmat prep question

Wed Apr 25, 2007 11:31 am
if y>0 what is the value of X?

1. Ix-3I > y

2. Ix-3I < -y

please explain to me, how one would approach this kind of question

f2001290 Master | Next Rank: 500 Posts
Joined
10 Mar 2007
Posted:
400 messages
Followed by:
1 members
1
Thu Apr 26, 2007 6:21 am
hi yvonne

i feel that sth is wrong with 2nd statement.

Modulus is always positive. So |X-3| cannot be <= -y;

Could you please check out the statemnet again.

All the best for your exam.

jayhawk2001 Community Manager
Joined
28 Jan 2007
Posted:
789 messages
Followed by:
1 members
30
Wed Apr 25, 2007 9:28 pm
yvonne12 wrote:
honestly I dont get it,why can't Ix-3I be negative? I dont understand absolute values in these kinds of problems... could you perhaps elaborate some more about these kinds of questions..I would appreciate it, since my test is on saturday and who knows if I might see this kind of question...
If you have OG-11, please check page 126 section 9.

The absolute value of x, denoted by |x| is defined to be x if x>=0
and -x if x < 0.

Either way, |x| is positive. Basically modulus of x is the absolute
distance between x and 0 on the number line. This value is
always positive just like distances .

I've seen 3 main concepts on GMATprep and other materials with
respect to modulus --

1. Finding value of -x|x|. This is simple if you know that |x| is always
positive and so the sign of -x determines the end result.

2. |x+y| <= |x| + |y|

3. Finding the value or range of |x - n |. In this case, you'll have to
assume that the "value" of x-n is always positive.

Now, if x is negative, x-n is negative and this is not permitted as
per modulus. So, |x-n| now becomes -(x-n)

If x is positive (and greater than n), |x-n| = x-n

I hope this helps.

yvonne12 wrote:
BTW, are you a monitor or someone that is also studying for the GMAT?. You have been answering all the questions I've been throwing out there, not that I have a problem with it...just curious. Im wondering how you know all this stuff. I've been studying for this exam for the past several months and even though I've been scoring high on the gmat prep, I still worry about this saturday (test day)....
I'm just a member trying to learn and help wherever I can. Haven't
taken the GMAT yet - so I'm still in learning mode .

Good luck with your exams and hey give it your best shot !

jayhawk2001 Community Manager
Joined
28 Jan 2007
Posted:
789 messages
Followed by:
1 members
30
Wed Apr 25, 2007 8:33 pm
yvonne12 wrote:
if y>0 what is the value of X?

1. Ix-3I > y

2. Ix-3I < -y

please explain to me, how one would approach this kind of question
Basic idea is that a modulus of a number can only be positive.

I recall seeing this question earlier and the second option was
|x-3| <= -y. I think you have left out the "=" part in 2.

1 - insufficient. x-3 > 0 implies x> 3. No unique value

2 - sufficient. |x-3| cannot be < 0. So it can only be = 0. So x = 3

Hence B.

yvonne12 Master | Next Rank: 500 Posts
Joined
07 Feb 2007
Posted:
144 messages
Wed Apr 25, 2007 9:08 pm
honestly I dont get it,why can't Ix-3I be negative? I dont understand absolute values in these kinds of problems... could you perhaps elaborate some more about these kinds of questions..I would appreciate it, since my test is on saturday and who knows if I might see this kind of question...

BTW, are you a monitor or someone that is also studying for the GMAT?. You have been answering all the questions I've been throwing out there, not that I have a problem with it...just curious. Im wondering how you know all this stuff. I've been studying for this exam for the past several months and even though I've been scoring high on the gmat prep, I still worry about this saturday (test day)....

### Best Conversation Starters

1 lheiannie07 72 topics
2 LUANDATO 60 topics
3 ardz24 48 topics
4 AAPL 46 topics
5 M7MBA 45 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 Jeff@TargetTestPrep

Target Test Prep

141 posts
2 Brent@GMATPrepNow

GMAT Prep Now Teacher

136 posts
3 GMATGuruNY

The Princeton Review Teacher

134 posts
4 Rich.C@EMPOWERgma...

EMPOWERgmat

128 posts
5 Scott@TargetTestPrep

Target Test Prep

99 posts
See More Top Beat The GMAT Experts