It is currently 20 Oct 2017, 17:15

### 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

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

Author Message
Manager
Joined: 24 Sep 2009
Posts: 106

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

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

### Show Tags

20 Mar 2010, 21:59
00:00

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:

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

 Veritas Prep GMAT Discount Codes Math Revolution Discount Codes Economist GMAT Tutor Discount Codes
Manager
Joined: 13 Dec 2009
Posts: 248

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

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

### Show Tags

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:

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.

_________________

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

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

Senior Manager
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

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:

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