It is currently 19 Mar 2018, 11:37

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

What is the value of a^-2 * b^-3 ? (1) a^-3 * b^-2 = 36^-1

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 14 Jan 2006
Posts: 87
Schools: HKUST
What is the value of a^-2 * b^-3 ? (1) a^-3 * b^-2 = 36^-1 [#permalink]

Show Tags

21 Sep 2008, 04:25
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

What is the value of a^-2 * b^-3 ?
(1) a^-3 * b^-2 = 36^-1
(2) ab^-1 = 6^-1
Intern
Joined: 13 Aug 2008
Posts: 17
Re: GMAT SET 17 [#permalink]

Show Tags

21 Sep 2008, 05:14
IMO C, both together are sufficient. OA?
Director
Joined: 12 Jul 2008
Posts: 513
Schools: Wharton
Re: GMAT SET 17 [#permalink]

Show Tags

21 Sep 2008, 05:47
nikhilpoddar wrote:
What is the value of a^-2 * b^-3 ?
(1) a^-3 * b^-2 = 36^-1
(2) ab^-1 = 6^-1

(1) Insufficient
We don't know the values of a or b.

(2) Insufficient
We don't know the values of a or b.

(1) and (2) Sufficient
ab = 6
a^3 * b^2 = 36
a^2 * b^2 * a = 36
(ab)^2 * a = 36
6^2 * a = 36
a = 1
b = 6
Manager
Joined: 28 Aug 2008
Posts: 98
Re: GMAT SET 17 [#permalink]

Show Tags

21 Sep 2008, 09:05
C

a = 1
b = 6

Stmt 1 : b could be 6 or -6, also shows a is positive (thus eliminating -1)
- INSF

Stmt 2 : a or b could both be postiive or negative
-INSF

Togehter - SUF - =1/246
Re: GMAT SET 17   [#permalink] 21 Sep 2008, 09:05
Display posts from previous: Sort by

What is the value of a^-2 * b^-3 ? (1) a^-3 * b^-2 = 36^-1

 post reply Question banks Downloads My Bookmarks Reviews Important topics

Moderator: chetan2u

 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®.