Is x less than y? (1) x-y+1<0 (2) x-y-1<0 any guesses? : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 24 Jan 2017, 01:13

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is x less than y? (1) x-y+1<0 (2) x-y-1<0 any guesses?

Author Message
Manager
Joined: 22 Jul 2009
Posts: 201
Location: Manchester UK
Followers: 2

Kudos [?]: 390 [0], given: 6

Is x less than y? (1) x-y+1<0 (2) x-y-1<0 any guesses? [#permalink]

### Show Tags

07 Dec 2009, 14:37
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:42) correct 0% (00:00) wrong based on 4 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is x less than y?
(1) x-y+1<0
(2) x-y-1<0

any guesses??
CEO
Joined: 17 Nov 2007
Posts: 3589
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 550

Kudos [?]: 3565 [0], given: 360

Re: Is x less than y? [#permalink]

### Show Tags

08 Dec 2009, 04:51
x<y ? ---> x-y < 0 ?

1) x-y + 1 < 0 ---> x-y < -1 sufficient
2) x-y -1 < 0 ---> x-y <1 insufficient

A
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Verbal Forum Moderator
Joined: 02 Aug 2009
Posts: 4250
Followers: 331

Kudos [?]: 3480 [0], given: 101

Re: Is x less than y? [#permalink]

### Show Tags

08 Dec 2009, 06:01
A.
(i)x-y+1<0....y>x+1 so sufficient
(ii)x-y-1<0...y+1>x so insufficient
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

SVP
Affiliations: HEC
Joined: 28 Sep 2009
Posts: 1637
Concentration: Economics, Finance
GMAT 1: 730 Q48 V44
Followers: 99

Kudos [?]: 629 [0], given: 432

Re: Is x less than y? [#permalink]

### Show Tags

08 Dec 2009, 18:39
Is x less than y?
(1) x-y+1<0
(2) x-y-1<0

(1) Sufficient. After some manipulation, we arrive at the inequality x+1<y. If y is bigger than x+1 (a number bigger than x), then it also holds that y is bigger than x.

(2) Insufficient. The inequality can also be stated as x<y+1. Y could very well be bigger than x, but it's also possible that y is not bigger. We are not sure what role the additional 1 plays in this inequality. For instance, in the inequality 10< 25+1, the "+1" doesn't matter. Y is still bigger than x. However, if 2.5<2+1, we see that "+1" determines the direction of the inequality sign and that y is actually smaller than x.

Hence, A is correct.
_________________
Re: Is x less than y?   [#permalink] 08 Dec 2009, 18:39
Display posts from previous: Sort by