Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 25 May 2017, 07:49

### 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

# A set of numbers has the property that for any number t in

Author Message
Intern
Joined: 02 May 2005
Posts: 12
Followers: 1

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

A set of numbers has the property that for any number t in [#permalink]

### Show Tags

01 Dec 2005, 14:28
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
VP
Joined: 22 Aug 2005
Posts: 1113
Location: CA
Followers: 1

Kudos [?]: 111 [0], given: 0

### Show Tags

01 Dec 2005, 15:23
D.

search in the archive. you will get discussion on this.
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5045
Location: Singapore
Followers: 31

Kudos [?]: 376 [0], given: 0

### Show Tags

01 Dec 2005, 19:20
-1 must have t+2 = 1
So if 1 is in the set, 3 must be in it, and 5 must be in it.

So Ans: D
Current Student
Joined: 29 Jan 2005
Posts: 5221
Followers: 26

Kudos [?]: 403 [0], given: 0

### Show Tags

01 Dec 2005, 22:32
ywilfred wrote:
-1 must have t+2 = 1
So if 1 is in the set, 3 must be in it, and 5 must be in it.

So Ans: D

Why not apply the same logic to -3 + 2 = -1?

The problem does not specify that (t) begins from -1, does it?
Intern
Joined: 02 May 2005
Posts: 12
Followers: 1

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

### Show Tags

02 Dec 2005, 12:00
OA is D. It is disputable that -3 is in the set and every disputable answers is wrong on the GMAT.
Intern
Joined: 22 Mar 2005
Posts: 39
Location: Houston
Followers: 0

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

### Show Tags

02 Dec 2005, 16:10
The stem would have to state "for any number t, t-2 is in the set" for -3 to be necessarily included (or for every number t+2, t is in the set maybe). It's kind of a chicken/egg debate but I read it and didn't think -3 had to be included.

-3 does not have to be there for -1 to be in the set.
02 Dec 2005, 16:10
Display posts from previous: Sort by
{"found_math": false, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0}