• Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh

Difficult Math Question #32 - Sets

This topic has 5 member replies
800guy Master | Next Rank: 500 Posts Default Avatar
Joined
27 Jun 2006
Posted:
354 messages
Followed by:
5 members
Thanked:
11 times

Difficult Math Question #32 - Sets

Post Mon Oct 23, 2006 2:27 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    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

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    rajs.kumar Senior | Next Rank: 100 Posts Default Avatar
    Joined
    09 Jun 2006
    Posted:
    87 messages
    Thanked:
    2 times
    Post Tue Oct 24, 2006 2:55 am
    D it is. {-1, 1, 3, ....., +inf}

    girikoratagere Newbie | Next Rank: 10 Posts Default Avatar
    Joined
    23 Oct 2006
    Posted:
    5 messages
    Post Tue Oct 24, 2006 7:31 am
    Is it C
    ?

    ajith Legendary Member
    Joined
    21 Sep 2006
    Posted:
    1275 messages
    Followed by:
    2 members
    Thanked:
    124 times
    Test Date:
    April 2010
    Target GMAT Score:
    740
    Post Tue Oct 24, 2006 8:32 pm
    D it is ..

    since -1 is there 1 has to be there
    similarly since 1 is there 3 has to be there
    so is 5

    -3 may or may not be there...

    limits660 Senior | Next Rank: 100 Posts
    Joined
    12 Jul 2006
    Posted:
    57 messages
    Followed by:
    2 members
    Post Wed Oct 25, 2006 4:27 am
    I think its E

    All of them are there

    _________________
    -
    Jeff Sacco
    www.jeffsacco.ca

    800guy Master | Next Rank: 500 Posts Default Avatar
    Joined
    27 Jun 2006
    Posted:
    354 messages
    Followed by:
    5 members
    Thanked:
    11 times
    Post Wed Oct 25, 2006 3:28 pm
    here's the OA:

    Series property: t => t+2. (Note: for any given number N, ONLY N + 2 is compulsory. N - 2 is not a necessity as N could be the first term...this can be used as a trap.)
    Given: -1 belongs to the series. => 1 => 3 =>5. DOES NOT imply -3.
    Hence, II and III (D).

    Best Conversation Starters

    1 Vincen 180 topics
    2 lheiannie07 65 topics
    3 Roland2rule 49 topics
    4 ardz24 40 topics
    5 LUANDATO 16 topics
    See More Top Beat The GMAT Members...

    Most Active Experts

    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    146 posts
    2 image description Rich.C@EMPOWERgma...

    EMPOWERgmat

    103 posts
    3 image description GMATGuruNY

    The Princeton Review Teacher

    100 posts
    4 image description EconomistGMATTutor

    The Economist GMAT Tutor

    92 posts
    5 image description Jay@ManhattanReview

    Manhattan Review

    79 posts
    See More Top Beat The GMAT Experts