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

It is currently 22 Aug 2014, 23:30

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

Is a > c?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 25 Nov 2009
Posts: 46
Location: India
Followers: 0

Kudos [?]: 8 [0], given: 6

Is a > c? [#permalink] New post 26 Jan 2010, 04:38
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

71% (02:01) correct 29% (01:03) wrong based on 91 sessions
Is a > c?

(1) b > d
(2) ab^2 – b > b^2c – d

OPEN DISCUSSION OF THIS QUESTION IS HERE: is-a-c-137240.html
[Reveal] Spoiler: OA
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesVeritas Prep GMAT Discount Codes
1 KUDOS received
CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 178

Kudos [?]: 925 [1] , given: 235

GMAT Tests User Reviews Badge
Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 06:15
1
This post received
KUDOS
IMO ans should be C.

1. clearly not sufficient.
2. ab^2 - b > cb^2-d

=> ab^2-cb^2 >b-d ==> (a-c) * b^2 > b-d
==> (a-c) * b^2 > 0 using equation 1.
since this is > 0 . b cannot be zero.

=> a-c > (b-d)/ b^2

since b> d given in 1. => a-c >0

hence a>c

Hence ans is C
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html


Last edited by gurpreetsingh on 26 Jan 2010, 07:08, edited 1 time in total.
Manager
Manager
avatar
Joined: 17 Jan 2010
Posts: 149
Concentration: General Management, Strategy
GPA: 3.78
WE: Engineering (Manufacturing)
Followers: 1

Kudos [?]: 38 [0], given: 11

Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 06:26
C, for the same reason stated above
Intern
Intern
avatar
Joined: 25 Nov 2009
Posts: 46
Location: India
Followers: 0

Kudos [?]: 8 [0], given: 6

Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 06:58
Thanks. But ain't we making an assumption here that b is not equal to 0?

Just a clarification (may b for all similar problems):
- should we also consider a possibility that b = 0 in such cases. What happens then?
1 KUDOS received
CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 178

Kudos [?]: 925 [1] , given: 235

GMAT Tests User Reviews Badge
Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 07:08
1
This post received
KUDOS
sudip135 wrote:
Thanks. But ain't we making an assumption here that b is not equal to 0?

Just a clarification (may b for all similar problems):
- should we also consider a possibility that b = 0 in such cases. What happens then?


I have modified my post. Please check. condition for B=0 has been solved.
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 178

Kudos [?]: 925 [0], given: 235

GMAT Tests User Reviews Badge
Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 08:01
alexBLR wrote:
hm, confused now


Please tell me what's your confusion, I might help you out.
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

Manager
Manager
avatar
Joined: 17 Jan 2010
Posts: 149
Concentration: General Management, Strategy
GPA: 3.78
WE: Engineering (Manufacturing)
Followers: 1

Kudos [?]: 38 [0], given: 11

Re: Is a > c (Data Sufficiency) [#permalink] New post 26 Jan 2010, 08:26
got it, that b=0 situation was a bit confusing,...thanks
Retired Moderator
User avatar
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1726
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 65

Kudos [?]: 278 [0], given: 109

GMAT Tests User
Re: Is a > c (Data Sufficiency) [#permalink] New post 17 Dec 2011, 22:12
+1 C

I am noticing that the key to solve these inequalities is to manipulate them. :)
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Joined: 22 Mar 2013
Posts: 882
Location: India
GPA: 3.51
WE: Information Technology (Computer Software)
Followers: 17

Kudos [?]: 238 [0], given: 185

Premium Member CAT Tests
Re: Is a > c (Data Sufficiency) [#permalink] New post 12 Aug 2013, 07:32
1> b>d insuff.
2> in second we derived a-c > (b-d)/b^2 insuff
combine 1 and 2
if b =-2 and d =-3 then in that case RHS = (-2+3)/4 = +ve
if b = 3 and d = 2 then RHS = (3-2)/9 = +ve
if b = 2 and d =-1 then RHS = (2+1)/4 = +ve

Means we will always get some positive value in RHS thus.
a > +ve + c now here we can see a is greater than +ve+c means c is less than a.

Answer is C.
_________________

Piyush K
-----------------------
Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison
Don't forget to press--> Kudos :)
My Articles: 1. WOULD: when to use? | 2. All GMATPrep RCs (New)
Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Senior Manager
Senior Manager
avatar
Joined: 10 Jul 2013
Posts: 344
Followers: 3

Kudos [?]: 103 [0], given: 102

Re: Is a > c (Data Sufficiency) [#permalink] New post 12 Aug 2013, 07:52
jusjmkol740 wrote:
Is a > c?

(1) b > d
(2) ab2 – b > b2c – d

...
brother post it in the data sufficiency section. this is the problem solving area...
:-D ok
_________________

Asif vai.....

Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Joined: 22 Mar 2013
Posts: 882
Location: India
GPA: 3.51
WE: Information Technology (Computer Software)
Followers: 17

Kudos [?]: 238 [0], given: 185

Premium Member CAT Tests
Re: Is a > c (Data Sufficiency) [#permalink] New post 12 Aug 2013, 07:55
this question was posted in 2010 :)
_________________

Piyush K
-----------------------
Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison
Don't forget to press--> Kudos :)
My Articles: 1. WOULD: when to use? | 2. All GMATPrep RCs (New)
Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 19052
Followers: 3373

Kudos [?]: 24546 [0], given: 2680

Re: Is a > c (Data Sufficiency) [#permalink] New post 12 Aug 2013, 08:25
Expert's post
Re: Is a > c (Data Sufficiency)   [#permalink] 12 Aug 2013, 08:25
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Is a > c? jjack0310 1 14 Dec 2013, 13:13
1 If a, b, and c are positive, is a + b > c? DelSingh 2 14 Aug 2012, 20:26
7 Experts publish their posts in the topic Is a > c? rphardu 9 13 Aug 2012, 11:06
1 Experts publish their posts in the topic If a > b > c > 0, is c < 3 ? yezz 7 15 Aug 2009, 23:45
If a>b, is a>c? MA 7 10 Feb 2005, 23:02
Display posts from previous: Sort by

Is a > c?

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

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®.