Find all School-related info fast with the new School-Specific MBA Forum

It is currently 01 Sep 2014, 20:43

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Is XY > X/Y? 1. Y is a positive fraction 2. XY > 1

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2770
Location: New York City
Followers: 6

Kudos [?]: 218 [0], given: 4

GMAT Tests User
Is XY > X/Y? 1. Y is a positive fraction 2. XY > 1 [#permalink] New post 08 Nov 2007, 14:46
Is XY > X/Y?

1. Y is a positive fraction
2. XY > 1
Manager
Manager
avatar
Joined: 08 Nov 2007
Posts: 100
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 08 Nov 2007, 15:09
I think E?

1. means Y could be 1 and X could be 1 also - in which case we end up with 1 x 1 > 1/1 - false

2.. on it's own doesn't tell anything about x/y

Even together, we could have, say, X=10 and Y=1. In which case XY is 10 and X/Y is also 10. Thus XY could still be equal to X/Y and thus the answer is not clear.
Director
Director
User avatar
Joined: 25 Oct 2006
Posts: 652
Followers: 7

Kudos [?]: 187 [0], given: 6

GMAT Tests User
 [#permalink] New post 08 Nov 2007, 15:13
IMO B.

Is XY>X/Y?
A) Y>1
Say X=-10 and Y=5
so from A -50>-2 ...FALSE

B) XY>1 so, X and Y both can be +ve or -ve (even we can take fractions)
Say X=-10 and Y=-5
So 50>2
OR
Say X=10 and Y=5
So 50>2

So B alone is sufficient to answer.
Manager
Manager
avatar
Joined: 08 Nov 2007
Posts: 100
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 08 Nov 2007, 15:19
priyankur_saha@ml.com wrote:
IMO B.

Is XY>X/Y?
A) Y>1
Say X=-10 and Y=5
so from A -50>-2 ...FALSE

B) XY>1 so, X and Y both can be +ve or -ve (even we can take fractions)
Say X=-10 and Y=-5
So 50>2
OR
Say X=10 and Y=5
So 50>2

So B alone is sufficient to answer.


I've just started looking at GMAT math for the first time in about 10 years, but I'm confused - how can we have a positive fraction if X is -10 and Y is 5? Wouldn't that give us -2/1 effectively?
Director
Director
User avatar
Joined: 25 Oct 2006
Posts: 652
Followers: 7

Kudos [?]: 187 [0], given: 6

GMAT Tests User
 [#permalink] New post 08 Nov 2007, 15:41
alrussell wrote:
priyankur_saha@ml.com wrote:
IMO B.

Is XY>X/Y?
A) Y>1
Say X=-10 and Y=5
so from A -50>-2 ...FALSE

B) XY>1 so, X and Y both can be +ve or -ve (even we can take fractions)
Say X=-10 and Y=-5
So 50>2
OR
Say X=10 and Y=5
So 50>2

So B alone is sufficient to answer.


I've just started looking at GMAT math for the first time in about 10 years, but I'm confused - how can we have a positive fraction if X is -10 and Y is 5? Wouldn't that give us -2/1 effectively?


I m sorry; I didn't get your question. If x=-10 and Y=5 then you will definitely get -2 and nothing has to be oblivious for it.
Director
Director
User avatar
Joined: 13 Dec 2006
Posts: 521
Location: Indonesia
Followers: 6

Kudos [?]: 95 [0], given: 0

GMAT Tests User
 [#permalink] New post 08 Nov 2007, 16:07
Answer C

Before solving the question, its important to understand that x and y can be positive or negative and integers or fractions, as its not clearly stated in the question.

Lets consider 1) if Y is a positive fraction then XY can be either > or < x/y, depending upon the value of X... for e.g. say Y = 2/5 and X = 5

Then XY <X> X/Y.... ignore 1

2) in this case either both x and y are positive or both of them are negative now is X and Y are integers then XY>X/Y, but if one of them is fraction the situation will reverse... so 2 is also not possible.

Combining both we will have the situation when x/y > XY for X being integer or fraction.
Director
Director
avatar
Joined: 09 Aug 2006
Posts: 767
Followers: 1

Kudos [?]: 47 [0], given: 0

GMAT Tests User
Re: fractions & inequalities - #30 [#permalink] New post 08 Nov 2007, 23:25
bmwhype2 wrote:
Is XY > X/Y?

1. Y is a positive fraction
2. XY > 1


I'm getting E.

Stat 1:
Let x = 1 & y = 1/2
xy = 1/2; x/y = 2
Is xy > x/y? No.

Let x = -1 & y = 1/2
xy = -1/2; x/y = -2
Is xy > x/y? Yes

Insuff.

Stat 2:
Let x = 3 & y = 1/2
xy = 3/2; x/y = 6
Is xy > x/y? No.

Let x = 1/2 & y = 5/2
xy = 5/4; x/y = 1/5
Is 5/4 > 1/5? Yes.
Insuff.

Together: If y is +ve then x has to be +ve. Same analysis as that of Stat 2 above. Insuff.
Re: fractions & inequalities - #30   [#permalink] 08 Nov 2007, 23:25
    Similar topics Author Replies Last post
Similar
Topics:
Is xy > x/y? (1) xy > 0 (2) y < 0 A. Statement (1) mikegao 2 17 Oct 2008, 09:33
2 IF x-y > 10 is x-y > x+y ? 1) x = 8 2) y = -20 bhatiagp 9 15 Apr 2008, 09:56
Is xy > x/y? (1) xy > 0 (2) y < 0 A. Statement (1) humtum0 2 18 Jun 2007, 18:37
Is xy > x/y? (1) xy > 0 (2) y < 0 A. Statement (1) TOUGH GUY 2 10 Dec 2005, 15:23
Is xy > x/y? (1) xy > 0 (2) y < 0 A. Statement (1) Vithal 4 05 Jun 2005, 13:09
Display posts from previous: Sort by

Is XY > X/Y? 1. Y is a positive fraction 2. XY > 1

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.