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Difficult Math Problem #88 - Geometry

This topic has 3 member replies
800guy Master | Next Rank: 500 Posts Default Avatar
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Difficult Math Problem #88 - Geometry

Post Fri Jan 19, 2007 9:32 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Which of the sets of numbers can be used as the lengths of the sides of a triangle?

    I. [5,7,12]
    II. [2,4,10]
    III. [5,7,9]

    A. I only
    B. III only
    C. I and II only
    D. I and III only
    E. II and III only


    from 'difficult math problems' problem set. OA coming after some people attempt answers/explanations

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    AMalik Junior | Next Rank: 30 Posts Default Avatar
    Joined
    15 Dec 2006
    Posted:
    15 messages
    Post Fri Jan 19, 2007 10:19 am
    800guy wrote:
    Which of the sets of numbers can be used as the lengths of the sides of a triangle?

    I. [5,7,12]
    II. [2,4,10]
    III. [5,7,9]

    A. I only
    B. III only
    C. I and II only
    D. I and III only
    E. II and III only


    from 'difficult math problems' problem set. OA coming after some people attempt answers/explanations
    Definitely Answer should be B

    maxim730 Senior | Next Rank: 100 Posts Default Avatar
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    2 members
    Post Fri Jan 19, 2007 10:50 am
    Yeah, B

    he length of the 2 smallest sides HAS to be greater than the 3rd side. So B.

    800guy Master | Next Rank: 500 Posts Default Avatar
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    Post Mon Jan 22, 2007 4:57 pm
    OA:

    For any side of a triangle. Its length must be greater than the difference between the other two sides, but less than the sum of the other two sides.
    Answer is B

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