• EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • 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
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

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

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test 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
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

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

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • 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
  • 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

If x > y, is |x| > |y|? (1) x > 0 (2)

This topic has 2 expert replies and 0 member replies
hazelnut01 Master | Next Rank: 500 Posts Default Avatar
Joined
19 Nov 2016
Posted:
161 messages
Followed by:
4 members
Thanked:
2 times

If x > y, is |x| > |y|? (1) x > 0 (2)

Post Sat May 20, 2017 4:45 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If x > y, is |x| > |y|?

    (1) x > 0
    (2) y > 0

    Source : Math Revolution
    OA=B

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Sat May 20, 2017 10:50 am
    HI ziyuenlau,

    This question can be solved by TESTing VALUES.

    We're told that X > Y. We're asked if |X| > |Y|. This is a YES/NO question.

    1) X > 0

    IF....
    X = 1, Y = 0, then the answer to the question is YES
    X = 1, Y = -2, then the answer to the question is NO
    Fact 1 is INSUFFICIENT

    2) Y > 0

    Here, since Y is POSITIVE, X must ALSO be positive. Since we already know that X > Y, dealing with two POSITIVE values means that |X| will ALWAYS be greater than |Y|. Thus the answer to the question is ALWAYS YES.
    Fact 2 is SUFFICIENT

    Final Answer: B

    GMAT assassins aren't born, they're made,
    Rich

    _________________
    Contact Rich at Rich.C@empowergmat.com

    Thanked by: gmatdestroyer13
    Post Sun May 21, 2017 2:31 pm
    It can be helpful when approaching a DS yes/no question to ask yourself: when would we get a NO answer?

    In this case, when would the absolute value of x *NOT* be greater than y, if x itself is greater than y?
    The only time that would be the case is if y is a negative number further away from 0 than x (whether x is positive or negative). If they were both positive, x would have to be further from 0 than y is, i f x > y. So we could rephrase the question as:
    Is y positive?

    If you frame the question that way before looking at the statements, it's clear that statement 1 is insufficient, but statement 2 is sufficient.

    _________________


    Ceilidh Erickson
    Manhattan Prep GMAT & GRE instructor
    EdM in Mind, Brain, and Education
    Harvard Graduate School of Education


    Manhattan Prep instructors all have 99th+ percentile scores and expert teaching experience.
    Sign up for a FREE TRIAL, and learn why we have the highest ratings in the GMAT industry!

    Thanked by: gmatdestroyer13
    Free Manhattan Prep online events - The first class of every online Manhattan Prep course is free. Classes start every week.

    Best Conversation Starters

    1 lheiannie07 111 topics
    2 ardz24 64 topics
    3 LUANDATO 62 topics
    4 swerve 60 topics
    5 AAPL 57 topics
    See More Top Beat The GMAT Members...

    Most Active Experts

    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    160 posts
    2 image description EconomistGMATTutor

    The Economist GMAT Tutor

    130 posts
    3 image description Rich.C@EMPOWERgma...

    EMPOWERgmat

    122 posts
    4 image description GMATGuruNY

    The Princeton Review Teacher

    122 posts
    5 image description Scott@TargetTestPrep

    Target Test Prep

    118 posts
    See More Top Beat The GMAT Experts