It is currently 20 Oct 2017, 17:15

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If X^3 > Y^4, which of the following CANNOT be true?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
User avatar
Joined: 24 Sep 2009
Posts: 106

Kudos [?]: 63 [0], given: 25

GMAT 1: 710 Q49 V37
Reviews Badge
If X^3 > Y^4, which of the following CANNOT be true? [#permalink]

Show Tags

New post 20 Mar 2010, 21:59
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

67% (00:57) correct 33% (01:47) wrong based on 6 sessions

HideShow timer Statistics

Source: Veritas Prep IPhone GMAT Practice Quiz - Hard Questions:

If \(X^3 > Y^4\), which of the following CANNOT be true?

a. X < 1
b. X + Y < 0
c. 0 < XY < 1
d. \(XY^2\)< 0
e. X = |X|

[Reveal] Spoiler:
Answer: D

Kudos [?]: 63 [0], given: 25

Veritas Prep GMAT Discount CodesMath Revolution Discount CodesEconomist GMAT Tutor Discount Codes
Manager
Manager
User avatar
Joined: 13 Dec 2009
Posts: 248

Kudos [?]: 250 [0], given: 13

Reviews Badge
Re: If X^3 > Y^4, which of the following CANNOT be true? [#permalink]

Show Tags

New post 20 Mar 2010, 23:39
NYCAnalyst wrote:
Source: Veritas Prep IPhone GMAT Practice Quiz - Hard Questions:

If \(X^3 > Y^4\), which of the following CANNOT be true?

a. X < 1
b. X + Y < 0
c. 0 < XY < 1
d. \(XY^2\)< 0
e. X = |X|

[Reveal] Spoiler:
Answer: D


if X^3>Y^4 it means X^3 > 0 since Y^4 is always >0.
now X^3> 0 => X>0
in option D XY^2 since X>0 and Y^2 is always going to be positive.
means XY^2 cannot be <0.

hence answer is D
_________________

My debrief: done-and-dusted-730-q49-v40

Kudos [?]: 250 [0], given: 13

Senior Manager
Senior Manager
avatar
Joined: 01 Feb 2010
Posts: 251

Kudos [?]: 61 [0], given: 2

Re: If X^3 > Y^4, which of the following CANNOT be true? [#permalink]

Show Tags

New post 21 Mar 2010, 04:38
NYCAnalyst wrote:
Source: Veritas Prep IPhone GMAT Practice Quiz - Hard Questions:

If \(X^3 > Y^4\), which of the following CANNOT be true?

a. X < 1
b. X + Y < 0
c. 0 < XY < 1
d. \(XY^2\)< 0
e. X = |X|

[Reveal] Spoiler:
Answer: D


Its D.
Y^4 has to be =ve hence x^3 is also +ve.
so x is +ve from answer choices xy^2 has to be +ve as Y^2 will be +ve and x is also +ve.

Kudos [?]: 61 [0], given: 2

Re: If X^3 > Y^4, which of the following CANNOT be true?   [#permalink] 21 Mar 2010, 04:38
Display posts from previous: Sort by

If X^3 > Y^4, which of the following CANNOT be true?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.