Welcome! Check out our free B-School Guides to learn how you compare with other applicants.
Login or Register

Problem 2

This topic has 1 expert reply and 0 member replies
candygal79 Rising GMAT Star
Joined
10 Feb 2014
Posted:
49 messages
Followed by:
3 members
Problem 2 Post Thu Apr 03, 2014 3:17 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Is the product of a certain pair of integer even ?

    1) The sum of the integers is odd

    2) One of the integer is even and odd

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Thu Apr 03, 2014 6:36 am
    candygal79 wrote:
    Is the product of a certain pair of integer even?

    1) The sum of the integers is odd
    2) One of the integer is even and odd
    Some important rules:
    1. ODD +/- ODD = EVEN
    2. ODD +/- EVEN = ODD
    3. EVEN +/- EVEN = EVEN

    4. (ODD)(ODD) = ODD
    5. (ODD)(EVEN) = EVEN
    6. (EVEN)(EVEN) = EVEN


    Target question: Is the product of a certain pair of integer even?

    Statement 1: The sum of the integers is odd
    So, if the sum is odd, we know that one integer is ODD, and one integer is EVEN (rule #2)
    If one integer is ODD, and one integer is EVEN, then their product must be even (rule #5).
    Since we can answer the target question with certainty, statement 1 is SUFFICIENT

    Statement 2: One of the integer is even and odd
    If one integer is ODD, and one integer is EVEN, then their product must be even (rule #5).
    Since we can answer the target question with certainty, statement 2 is SUFFICIENT

    Answer = D

    Cheers,
    Brent

    _________________
    Brent Hanneson – Founder of GMATPrepNow.com
    Use our video course along with Beat The GMAT's free 60-Day Study Guide

    Enter our contest to win a free course.

    Thanked by: Anaira Mitch
    GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMAT’s FREE 60-Day Study Guide and reach your target score in 2 months!

    Best Conversation Starters

    1 aditiniyer 21 topics
    2 Mo2men 15 topics
    3 rsarashi 11 topics
    4 neha shekhawat 8 topics
    5 neeti2711 7 topics
    See More Top Beat The GMAT Members...

    Most Active Experts

    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    113 posts
    2 image description GMATGuruNY

    The Princeton Review Teacher

    105 posts
    3 image description Matt@VeritasPrep

    Veritas Prep

    81 posts
    4 image description DavidG@VeritasPrep

    Veritas Prep

    77 posts
    5 image description Rich.C@EMPOWERgma...

    EMPOWERgmat

    73 posts
    See More Top Beat The GMAT Experts