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

It is currently 30 Aug 2015, 02:00
GMAT Club Tests

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

If x and y are positive, is x^3 > y? (1) square root

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
User avatar
Joined: 13 Jun 2004
Posts: 1119
Location: London, UK
Schools: Tuck'08
Followers: 7

Kudos [?]: 33 [0], given: 0

If x and y are positive, is x^3 > y? (1) square root [#permalink] New post 16 Oct 2004, 05:59
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x and y are positive, is x^3 > y?

(1) square root (x)> y
(2) x > y
Manager
Manager
avatar
Joined: 13 Oct 2004
Posts: 50
Followers: 0

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

 [#permalink] New post 16 Oct 2004, 06:32
My answer will be E - both not sufficient
Joined: 31 Dec 1969
Location: India
Concentration: Strategy, Operations
GMAT 1: 710 Q49 V0
GMAT 2: 740 Q40 V50
GMAT 3: 700 Q48 V38
GMAT 4: 710 Q45 V41
GPA: 4
WE: Sales (Investment Banking)
Followers: 0

Kudos [?]: 108 [0], given: 89751

 [#permalink] New post 16 Oct 2004, 09:25
1. sqrt(X) >Y. Suff. let sqrt(X) = 4. => X=2 =>X^3 = 8. If 4 is > y then 8 is surely > Y.

2. X>Y. let X=2. if 2>Y then X63 is 8 will surely be > than Y. Suff.

D.

Note: X and Y are positive.
Joined: 31 Dec 1969
Location: India
Concentration: Strategy, Operations
GMAT 1: 710 Q49 V0
GMAT 2: 740 Q40 V50
GMAT 3: 700 Q48 V38
GMAT 4: 710 Q45 V41
GPA: 4
WE: Sales (Investment Banking)
Followers: 0

Kudos [?]: 108 [0], given: 89751

 [#permalink] New post 16 Oct 2004, 09:26
1. sqrt(X) >Y. Suff. let sqrt(X) = 4. => X=2 =>X^3 = 8. If 4 is > y then 8 is surely > Y.

2. X>Y. let X=2. if 2>Y then X^3 is 8 will surely be > than Y. Suff.

D.

Note: X and Y are positive.
Manager
Manager
avatar
Joined: 13 Oct 2004
Posts: 50
Followers: 0

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

 [#permalink] New post 16 Oct 2004, 10:18
consider a case of fraction
(1) square root (x)> y , this does not mean that x^3 will also be greater than y.

(2) x > y. Same explanation here.
Intern
Intern
avatar
Joined: 14 Oct 2004
Posts: 27
Followers: 0

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

 [#permalink] New post 16 Oct 2004, 10:24
My answer is E

If x = 1/9, and y = 1/10

square root of 1/9 = 1/3 which is > (1/10)

1/9 > 1/ 10

but 1/9 ^ 3 = 1/729 which is less than 1/82

so (1) and (2) are insufficient
_________________

Victory always starts in the head. It's a state of mind

Director
Director
User avatar
Joined: 16 Jun 2004
Posts: 893
Followers: 2

Kudos [?]: 29 [0], given: 0

 [#permalink] New post 16 Oct 2004, 10:48
Agree E. considering fractions is key.
  [#permalink] 16 Oct 2004, 10:48
Display posts from previous: Sort by

If x and y are positive, is x^3 > y? (1) square root

  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®.