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

It is currently 16 Apr 2014, 17:05

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

p,r,s,t,u An arithmetic sequance is a sequence in which each

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
Joined: 23 Mar 2008
Posts: 226
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
p,r,s,t,u An arithmetic sequance is a sequence in which each [#permalink] New post 13 Apr 2008, 10:02
p,r,s,t,u


An arithmetic sequance is a sequence in which each term after the first is equal to the sum bof the preceding term and a constant. If the list of numbers shown above is an arithmetic sequence, which of the following must also be an arithmetic sequence?

I. 2p, 2r, 2s, 2t,2u
II. p-3, r-3, s-3, t-3, u-3
III. p^2, r^2, s^2, t^2, u^2

a) I only
b) II only
c) III only
d) I and II only
e) II and III only
Senior Manager
Senior Manager
User avatar
Joined: 28 Feb 2007
Posts: 309
Followers: 1

Kudos [?]: 24 [0], given: 0

GMAT Tests User
Re: sequence [#permalink] New post 13 Apr 2008, 10:53
B.
AS-arith. sequence.
X- any real number.
AS(1) +/- X = AS(2) (always true).
Manager
Manager
Joined: 25 Mar 2008
Posts: 107
Followers: 1

Kudos [?]: 10 [0], given: 0

Re: sequence [#permalink] New post 13 Apr 2008, 11:14
can u describe in details plsssssssssssss?
Director
Director
User avatar
Joined: 14 Oct 2007
Posts: 759
Location: Oxford
Schools: Oxford'10
Followers: 13

Kudos [?]: 169 [0], given: 8

GMAT Tests User
Re: sequence [#permalink] New post 13 Apr 2008, 13:03
let the original sequence be written as below by adding the constant each time

p, p+c, p+2c, p+3c, p+4c

lets transform the above as per our choices

I) 2p, 2p+2c, 2p+4c, 2p+6c, 2p+8c (this is an arithmetic seq. since there is an equal increase of 2c in each term of the sequence)
II) p-3, p+c-3, p+2c-3, p+3c -3, p+4c-3 (this is an arithmetic seq, since there is an equal increase of c in each term)
III) p^2, (p+c)^2, (p+3c)^2.... (just looking at the first 3 terms, the increase isn't constant, since in the second term the increase is 2pc+ c^2 and in the third term the increase is 6pc+9c^2)

so the answer is D

puma wrote:
p,r,s,t,u


An arithmetic sequance is a sequence in which each term after the first is equal to the sum bof the preceding term and a constant. If the list of numbers shown above is an arithmetic sequence, which of the following must also be an arithmetic sequence?

I. 2p, 2r, 2s, 2t,2u
II. p-3, r-3, s-3, t-3, u-3
III. p^2, r^2, s^2, t^2, u^2

a) I only
b) II only
c) III only
d) I and II only
e) II and III only
Current Student
Joined: 28 Dec 2004
Posts: 3411
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 148 [0], given: 2

GMAT Tests User
Re: sequence [#permalink] New post 13 Apr 2008, 13:11
I will go with D as welll..

option 3 is a geometric squence..and its sum may not be a sequence..
CEO
CEO
User avatar
Joined: 17 May 2007
Posts: 2995
Followers: 52

Kudos [?]: 408 [0], given: 210

GMAT Tests User
Re: sequence [#permalink] New post 14 Apr 2008, 21:00
Agree with D - Whats the OA ?
Re: sequence   [#permalink] 14 Apr 2008, 21:00
    Similar topics Author Replies Last post
Similar
Topics:
New posts In a sequence of terms in which each term is three times the karlfurt 7 30 Oct 2006, 06:37
New posts In a sequence of numbers in which each term after the first Jamesk486 2 31 May 2007, 05:42
New posts 3 An arithmetic sequence is a sequence in which each term blog 7 25 Jan 2008, 12:53
New posts 1 p, r, s, t, u An arithmetic sequence is a sequence in which sondenso 2 26 Feb 2008, 18:50
New posts 2 Experts publish their posts in the topic A geometric sequence is a sequence in which each mau5 2 23 Apr 2013, 21:04
Display posts from previous: Sort by

p,r,s,t,u An arithmetic sequance is a sequence in which each

  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®.