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

 It is currently 03 May 2015, 02:14

### 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

# DS from Kaplan what is the value of x? 1. x^2 / 3 = x/81 2.

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
CEO
Joined: 15 Aug 2003
Posts: 3469
Followers: 61

Kudos [?]: 701 [0], given: 781

DS from Kaplan what is the value of x? 1. x^2 / 3 = x/81 2. [#permalink]  13 Dec 2003, 04:46
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
DS from Kaplan

what is the value of x?

1. x^2 / 3 = x/81

2. x>0

i get C ...kaplan says its A.
 Kaplan GMAT Prep Discount Codes Knewton GMAT Discount Codes GMAT Pill GMAT Discount Codes
Senior Manager
Joined: 12 Oct 2003
Posts: 251
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  13 Dec 2003, 06:32
A

1. x^2 / 3 = x/81
divide both sides by x (does not matter if x is -ve or +ve because it is an equation and not an inequality)

x/3 = 1/81
x = 3/81 = 1/27

A is sufficient
Director
Joined: 03 Jul 2003
Posts: 655
Followers: 2

Kudos [?]: 22 [0], given: 0

[#permalink]  13 Dec 2003, 06:43
What if X=0?
A yields two values.
B gives many values
A+B --> 1/27

Thus, Answer should be C.
Senior Manager
Joined: 12 Oct 2003
Posts: 251
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  13 Dec 2003, 07:04
TRUE.

was trying to explain kaplan's stand ... NOT MINE
Manager
Joined: 26 Aug 2003
Posts: 233
Location: United States
Followers: 1

Kudos [?]: 2 [0], given: 0

[#permalink]  13 Dec 2003, 07:25
A.

(1)
x┬▓/3 = x/81
x┬▓/x = 3/81 ... just showing extra step to resolve the issues raised by some here.
x = 1/27

(2) x > 0, doesn't tell us anything we don't know.
CEO
Joined: 15 Aug 2003
Posts: 3469
Followers: 61

Kudos [?]: 701 [0], given: 781

[#permalink]  13 Dec 2003, 07:27
wonder_gmat wrote:
A.

(1)
x┬▓/3 = x/81
x┬▓/x = 3/81 ... just showing extra step to resolve the issues raised by some here.
x = 1/27

(2) x > 0, doesn't tell us anything we don't know.

even x= 0 is a solution to the equation.

is it not?
Senior Manager
Joined: 12 Oct 2003
Posts: 251
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  13 Dec 2003, 07:28
again the same question to wonder_gmat .. how can you divide by x if x were to be 0 ?
CEO
Joined: 15 Aug 2003
Posts: 3469
Followers: 61

Kudos [?]: 701 [0], given: 781

[#permalink]  13 Dec 2003, 07:30
pitts20042006 wrote:
again the same question to wonder_gmat .. how can you divide by x if x were to be 0 ?

why do you need to divide?

x^2 / 3 - x/81 = 0

x ( 27x-1) = 0

x = 0 or x = 1/27

A not sufficient
CEO
Joined: 15 Aug 2003
Posts: 3469
Followers: 61

Kudos [?]: 701 [0], given: 781

[#permalink]  13 Dec 2003, 07:32
wonder_gmat wrote:
A.

(1)
x┬▓/3 = x/81
x┬▓/x = 3/81 ... just showing extra step to resolve the issues raised by some here.
x = 1/27

(2) x > 0, doesn't tell us anything we don't know.

wonder, thats wrong

for your division to work, you need to assume that x not equal to 0.
Senior Manager
Joined: 12 Oct 2003
Posts: 251
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  13 Dec 2003, 07:34
I never said you need to divide ... but wonder_Gmat did divide and so the question to him
[#permalink] 13 Dec 2003, 07:34
Similar topics Replies Last post
Similar
Topics:
1 What is the value of x^2 + 1/x^2 ? 6 24 Mar 2015, 03:32
What is the value of x^2 ? x = sqrt{2x - 1} x^2 = x^3 3 13 Oct 2011, 01:36
What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2 3 08 Oct 2008, 22:35
2^x-2^(x-2)=3*(2^13), what is the value of x? 1.) 9 2.) 11 4 12 Mar 2006, 09:38
What is the value of p of x^2+6x+p? 1) x^2+6x+p= -3 2) 6 11 Dec 2005, 05:38
Display posts from previous: Sort by

# DS from Kaplan what is the value of x? 1. x^2 / 3 = x/81 2.

 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®.