PS-Numbers : PS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 17 Jan 2017, 15:50

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

PS-Numbers

Author Message
Senior Manager
Joined: 05 Jun 2008
Posts: 307
Followers: 2

Kudos [?]: 127 [0], given: 0

Show Tags

07 Dec 2008, 06:33
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A set of numbers has the property that for any number t in the set, t + 2 is in the set. If –1 is in the set, which of the following must also be in the set?
I. –3 II. 1 III. 5
A. I only
B. II only
C. I and II only
D. II and III only
E. I, II, and III
Senior Manager
Joined: 30 Nov 2008
Posts: 490
Schools: Fuqua
Followers: 10

Kudos [?]: 277 [0], given: 15

Show Tags

07 Dec 2008, 08:22
I go with E.

Set T will be containing the numbers {....-5,-3,-1,1,3,5,.....}
Manager
Joined: 14 Oct 2008
Posts: 160
Followers: 1

Kudos [?]: 55 [0], given: 0

Show Tags

07 Dec 2008, 08:33
Once again, little confusing . The statement says for any t, t+2 should be in the set, it does not say for any t+2, t should be in the set. For that reasons, i would go for 1 and 5 to be in the set, Hence answer should be D.

Pls post the QA soon vivektripathi, i would like to know of this is the right thinking ....
Manager
Joined: 23 Nov 2008
Posts: 77
Followers: 1

Kudos [?]: 46 [0], given: 0

Show Tags

07 Dec 2008, 12:07
I go with D as well.

The question asks which numbers MUST be there. -1 could be the 'root' of the series, which would mean -3 doesnt necessarily have to be there.

Another way of looking at it is the series has t and t+2 for all t, but not t-2 necessarily.

whats the OA?
Re: PS-Numbers   [#permalink] 07 Dec 2008, 12:07
Display posts from previous: Sort by