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Is n > 6?

This topic has 2 expert replies and 0 member replies

Is n > 6?

Post Thu Sep 14, 2017 4:32 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Is n > 6?

    (1) n√>2.5n>2.5
    (2) n>37--√

    Anyone, please, could share the process of solving this problem.

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Thu Sep 14, 2017 6:50 am
    ardz24 wrote:
    Is n > 6?

    (1) n√>2.5n>2.5
    (2) n>37--√

    Anyone, please, could share the process of solving this problem.
    You might want to check your posts after you enter them Smile

    Cheers,
    Brent

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

    Check out the online reviews of our course

    Thanked by: ardz24
    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!
    Post Thu Sep 14, 2017 6:58 am
    So, here's the ACTUAL question...

    Quote:
    Is n > 6
    1) √n > 2.5
    2) n > √37
    Target question: Is n > 6?

    Statement 1: √n > 2.5
    Square both sides to get: n > (2.5)²
    Evaluate to get: n > 6.25
    If n > 6.25, then we can be CERTAIN that n > 6
    Since we can answer the target question with certainty, statement 1 is SUFFICIENT

    Statement 2: n > √37
    First recognize that √36 < √37
    In other words, 6 < √37
    Statement 2 tells us that √37 < n
    So, we can COMBINE the inequalities to get 6 < √37 < n
    From this, we can conclude that n > 6
    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

    Check out the online reviews of our course

    Thanked by: ardz24
    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!

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