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

 It is currently 05 May 2015, 22:19

### 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

# 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
TAGS:
VP
Joined: 13 Jun 2004
Posts: 1122
Location: London, UK
Schools: Tuck'08
Followers: 7

Kudos [?]: 31 [0], given: 0

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

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If x and y are positive, is x^3 > y?

(1) square root (x)> y
(2) x > y
Manager
Joined: 13 Oct 2004
Posts: 51
Followers: 0

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

[#permalink]  16 Oct 2004, 06:32
My answer will be E - both not sufficient
Joined: 31 Dec 1969
Location: India
Concentration: General Management, Strategy
GMAT 1: 710 Q49 V0
GMAT 2: 740 Q40 V50
GMAT 3: 700 Q48 V38
GPA: 3.6
Followers: 0

Kudos [?]: 90 [0], given: 87146

[#permalink]  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: General Management, Strategy
GMAT 1: 710 Q49 V0
GMAT 2: 740 Q40 V50
GMAT 3: 700 Q48 V38
GPA: 3.6
Followers: 0

Kudos [?]: 90 [0], given: 87146

[#permalink]  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
Joined: 13 Oct 2004
Posts: 51
Followers: 0

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

[#permalink]  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
Joined: 14 Oct 2004
Posts: 27
Followers: 0

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

[#permalink]  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
Joined: 16 Jun 2004
Posts: 893
Followers: 2

Kudos [?]: 19 [0], given: 0

[#permalink]  16 Oct 2004, 10:48
Agree E. considering fractions is key.
[#permalink] 16 Oct 2004, 10:48
Similar topics Replies Last post
Similar
Topics:
5 If x and y are positive, is x^3 > y? 15 24 Jul 2009, 08:54
1 If x and y are positive, is x^3 > y? 4 24 Dec 2008, 14:04
Is x > y? (1) root(x) > y (2) x ^ 3 > y can we 10 24 Jun 2008, 15:52
If x and y are positive, is x^3 > y? (1) sq root (x) > 2 05 Feb 2008, 11:21
x and y are both positive numbers. Is x^3 > y? 1) root x 4 15 Dec 2005, 23:19
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

 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®.