• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

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

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

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

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

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

## 500 DS

This topic has 2 member replies
dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages

#### 500 DS

Sun Apr 01, 2007 1:12 pm
Hi,

The answer is D but I thought the answer was B because 1) dose not say if Y and S are positive....

Is x - y > r - s?
(1) x > r and y < s?
(2) y = 2, s = 3, r = 5, and x = 6.

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
gabriel Legendary Member
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
51
Mon Apr 02, 2007 4:00 am
dunkin77 wrote:
Hi,

The answer is D but I thought the answer was B because 1) dose not say if Y and S are positive....

Is x - y > r - s?
(1) x > r and y < s?
(2) y = 2, s = 3, r = 5, and x = 6.
remember this rule.... if a(1)>a(2) and a(3) > a(4) ...... then a(1) + a(3)>a(2)+a(4)....

applying this rule to the first statement ... x>r and s>y... so x+s>y+r ... so x-y>r-s ... so A is sufficient...

Prasanna Master | Next Rank: 500 Posts
Joined
26 Feb 2007
Posted:
418 messages
24
Sun Apr 01, 2007 5:10 pm
dunkin77 wrote:
Hi,

The answer is D but I thought the answer was B because 1) dose not say if Y and S are positive....

Is x - y > r - s?
(1) x > r and y < s?
(2) y = 2, s = 3, r = 5, and x = 6.
--------------------------------------------------------------------

Hi

I tried substituting both positive and negative for the variables. I observe that (1) is sufficient to answer the question. Some of the values I considered

10-(-20)> 9-(-19)

-10-(20)>-11-(21)

-10-(-20)>-11-(-19)

Think the answer should be D. Did you come across any set of values for which it fails?

Prasanna

### Best Conversation Starters

1 lheiannie07 116 topics
2 LUANDATO 68 topics
3 swerve 65 topics
4 ardz24 65 topics
5 Roland2rule 64 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

198 posts
2 Brent@GMATPrepNow

GMAT Prep Now Teacher

181 posts
3 Jeff@TargetTestPrep

Target Test Prep

168 posts
4 Rich.C@EMPOWERgma...

EMPOWERgmat

134 posts
5 GMATGuruNY

The Princeton Review Teacher

119 posts
See More Top Beat The GMAT Experts