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

It is currently 19 Oct 2014, 20:55

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

PS-numbers

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
User avatar
Joined: 03 Sep 2006
Posts: 893
Followers: 6

Kudos [?]: 168 [0], given: 33

PS-numbers [#permalink] New post 24 Jun 2007, 20:02
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Pl exp.
Attachments

untitled.PNG
untitled.PNG [ 47.44 KiB | Viewed 381 times ]

Manager
Manager
avatar
Joined: 18 Sep 2006
Posts: 58
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 24 Jun 2007, 20:09
I think the correct answer is A
My reasoning,
X^4 + y^4 = 100, so the greatest value of X would be when Y is minimized, so assume Y = 0;
So X^4 = 100
=> X^2 = 10
=> X = Sqrt(10)
=> so x > 3 and X <4
now, looking at the answer choices, if we assume Y has some value, we can safely assume that X is between 0 and 3

What is OA; i am torn between A or B, but if I had to guess, I would choose A
Director
Director
User avatar
Joined: 03 Sep 2006
Posts: 893
Followers: 6

Kudos [?]: 168 [0], given: 33

 [#permalink] New post 24 Jun 2007, 20:20
saurster wrote:
I think the correct answer is A
My reasoning,
X^4 + y^4 = 100, so the greatest value of X would be when Y is minimized, so assume Y = 0;
So X^4 = 100
=> X^2 = 10
=> X = Sqrt(10)
=> so x > 3 and X <4
now, looking at the answer choices, if we assume Y has some value, we can safely assume that X is between 0 and 3

What is OA; i am torn between A or B, but if I had to guess, I would choose A


I did so, ( under time pressure of course! ) and it turned out to be wrong!
Manager
Manager
avatar
Joined: 18 Sep 2006
Posts: 58
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 24 Jun 2007, 20:37
bummer, so is the correct answer B?
Thats seems to be the only logical answer
Manager
Manager
avatar
Joined: 23 Apr 2007
Posts: 130
Followers: 1

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

 [#permalink] New post 24 Jun 2007, 23:20
Another explanation....

x^4+y^4=100
Max value for X is when y = 0.
So x^4 must be 100
Ans choice
a) 0...3
Now it canot be 3 since 3*3*3*3 = 81 which is less than 100
b) 3...6
Now 6*6*6*6 >100
So x has to be btw 3 and 6.

Choice 'B' is correct
Hope this helps
  [#permalink] 24 Jun 2007, 23:20
    Similar topics Author Replies Last post
Similar
Topics:
PS-Numbers vivektripathi 3 07 Dec 2008, 06:33
ps-number properties jadomakoh 2 09 Mar 2008, 08:59
PS-numbers greater smaller LM 6 24 Jun 2007, 20:03
PS-Number Properties buckkitty 2 23 Jan 2006, 13:34
PS-number properties Seyi 3 08 Dec 2004, 15:39
Display posts from previous: Sort by

PS-numbers

  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®.