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

It is currently 30 Aug 2014, 14:23

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 is a positive number less than 10, is z greater than

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 15 Aug 2005
Posts: 804
Location: Singapore
Followers: 2

Kudos [?]: 3 [0], given: 0

GMAT Tests User
If x is a positive number less than 10, is z greater than [#permalink] New post 30 Sep 2005, 05:19
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
If x is a positive number less than 10, is z greater than the arithmatic mean of x and 10?

(1) On the number line z is closer to 10 than it is to x
(2) z = 5x

Please explain. I couldnt get the OE!! THanks!
_________________

Cheers, Rahul.

Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 158 [0], given: 2

GMAT Tests User
 [#permalink] New post 30 Sep 2005, 05:53
hmm, I would say A is sufficient


if Z is closer to 10, then it will pull closer to 10, while if x is furhter apart the avg is going to pull closer to X....

say if X is 5, then 10+5=15/2= 7.5

well we are told in I) that the Z is closer to 10 than to X...so

Z has to be greater than 7, cause if i z was say 7, it will be only 2 points away from 5 and 3 points away from 10...(1) tells us that z is closer to 10, than it is to X...so probably z=8 or 9 or something....

(II) x can be 1 then you will see the avg of 10 and x is 5.5, but z=5.
Senior Manager
Senior Manager
avatar
Joined: 29 Nov 2004
Posts: 486
Location: Chicago
Followers: 1

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

GMAT Tests User
 [#permalink] New post 30 Sep 2005, 06:04
A IMO too, good explanation frieshna12
_________________

Fear Mediocrity, Respect Ignorance

Director
Director
avatar
Joined: 15 Aug 2005
Posts: 804
Location: Singapore
Followers: 2

Kudos [?]: 3 [0], given: 0

GMAT Tests User
 [#permalink] New post 30 Sep 2005, 07:26
Oh yeah! I read it as z is closer to 10 than x....
Thanks for the explanation!
_________________

Cheers, Rahul.

Intern
Intern
avatar
Joined: 02 Oct 2005
Posts: 39
Followers: 0

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

 [#permalink] New post 03 Oct 2005, 19:03
I just have one problem.

If z=9 and x=8, Average of X and 10 will be equal to 9 which is equal to z. The question clearly asks if z will be greater than the average of x and 10. So am not too sure if A is sufficient. If it were greater than or equal to then , your argument is correct.
Senior Manager
Senior Manager
avatar
Joined: 30 Oct 2004
Posts: 289
Followers: 1

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

GMAT Tests User
 [#permalink] New post 03 Oct 2005, 19:07
Gmatsoon wrote:
I just have one problem.

If z=9 and x=8, Average of X and 10 will be equal to 9 which is equal to z. The question clearly asks if z will be greater than the average of x and 10. So am not too sure if A is sufficient. If it were greater than or equal to then , your argument is correct.


Hi Gmatsoon,

The statement 1) clearly says 'z is closer to 10 than to x' which means, you cannot consider z=9, x=8 as it would mean it is equidistant from x and 10 (by a value of 1).
_________________

-Vikram

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 17

Kudos [?]: 136 [0], given: 0

GMAT Tests User
 [#permalink] New post 03 Oct 2005, 23:02
We're told that:

a) 0 < x < 10

We're asked whether z > (x+10)/2 ==> z > x/2 + 10

From statement 1, if z = 9 and x = 8, then x/2 + 10 = 14 and z < x/2 + 10
if z = 9 and x = 0, then x/2 + 10 = 10 and z < x/2 + 10

So z will always be smaller and we're able to answer the question. Statement 1 is therefore sufficient.

From statement 2, we can equate z/5 = x so x/2 + 10 = z/10 + 10 and we can't tell if z is greater than or less than x.

Ans: A

PS: If you're abe to answer yes or no for thsi question, then the statement is sufficient.
  [#permalink] 03 Oct 2005, 23:02
    Similar topics Author Replies Last post
Similar
Topics:
1 If x is a positive number less than 10, is z greater than amitdgr 4 11 Oct 2008, 23:06
If x is a positive number less than 10, is z greater than japped187 2 14 May 2008, 16:41
If x is a positive number less than 10, is z greater than LM 2 23 Jun 2007, 01:59
If x is a positive number less than 10, is z greater than dinesh8 9 30 May 2006, 16:17
1 Experts publish their posts in the topic If x is a positive number less than 10, is z greater than th rianah100 12 08 Nov 2005, 03:40
Display posts from previous: Sort by

If x is a positive number less than 10, is z greater than

  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®.