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

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test 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
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

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

    Available with Beat the GMAT members only code

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

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider

In DS, how x>5 satisfies "is x>0"?

This topic has 2 expert replies and 1 member reply

In DS, how x>5 satisfies "is x>0"?

Post Fri Sep 18, 2015 8:46 am
how x>5 satisfies "is x>0"?

x>0 is-
Besides x is positive, x>0 also mean x could be 1/2, 1 ,2,3, 5, 100.

But x>5 means x could only be anything greater than 5, i.e. 5.5, 6, 10, but not 1, 2,3, 4.

So how does x>5 satisfies "is x>0"? (It was in one of the Beat the GMAT videos)

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
Post Fri Sep 18, 2015 9:13 am
Hi akshat.pant3,

The answer to a DS question is based on the 'consistency' of the resulst. A 'sufficient' Fact is one that gives you enough information to lead to a consistent result/answer.

As an example....
If a DS question asks "Is X > 0?", then THAT question is what we have to 'measure' our work against...

1) X^2 = 36

Here, X could be two different values: 6 or -6. With "6", the answer to the question is YES. With "-6", the answer to the question is NO. Those answers are INCONSISTENT, so Fact 1 is insufficient.

2) X > 5

Here, we know that X MUST be greater than 5, so regardless of what value(s) you make X, they are ALL greater than 0, so the answer to the question is ALWAYS YES and Fact 2 is sufficient.

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

_________________
Contact Rich at Rich.C@empowergmat.com

Post Sun Sep 20, 2015 3:02 am
Rich.C@EMPOWERgmat.com wrote:
Hi akshat.pant3,

The answer to a DS question is based on the 'consistency' of the resulst. A 'sufficient' Fact is one that gives you enough information to lead to a consistent result/answer.

As an example....
If a DS question asks "Is X > 0?", then THAT question is what we have to 'measure' our work against...

1) X^2 = 36

Here, X could be two different values: 6 or -6. With "6", the answer to the question is YES. With "-6", the answer to the question is NO. Those answers are INCONSISTENT, so Fact 1 is insufficient.

2) X > 5

Here, we know that X MUST be greater than 5, so regardless of what value(s) you make X, they are ALL greater than 0, so the answer to the question is ALWAYS YES and Fact 2 is sufficient.

GMAT assassins aren't born, they're made,
Rich
Yes, I got it till that point. However, where I'm confused is:
If x>0 then x can be 1,2,3,4,5 and also 6,7..
But x>5 only satisfies 6,7...but cannot satisfy if x=1,2,3,4,5

Post Sun Sep 20, 2015 9:25 am
Hi akshat.pant3,

You have to differentiate between the QUESTION that is asked and the INFORMATION that you're given.

If a question asks "Is X > 0?", then that does NOT provide any information - it's just a question. Until you know more about "X", there is no way to answer the question.

Once you learn that X > 5, THEN you can answer the question (and the answer is ALWAYS YES, since any number that is greater than 5 is also greater than 0).

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

_________________
Contact Rich at Rich.C@empowergmat.com

Best Conversation Starters

1 Vincen 180 topics
2 lheiannie07 61 topics
3 Roland2rule 54 topics
4 ardz24 44 topics
5 VJesus12 14 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 image description Brent@GMATPrepNow

GMAT Prep Now Teacher

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

EMPOWERgmat

105 posts
3 image description GMATGuruNY

The Princeton Review Teacher

101 posts
4 image description Jay@ManhattanReview

Manhattan Review

82 posts
5 image description Matt@VeritasPrep

Veritas Prep

80 posts
See More Top Beat The GMAT Experts