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Difficult Math Question #46 - Arithmetic

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800guy Master | Next Rank: 500 Posts Default Avatar
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Difficult Math Question #46 - Arithmetic

Post Fri Nov 03, 2006 1:12 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    For a certain company, operating costs and commissions totaled $550 million in 1990, representing an increase of 10 percent from the previous year. The sum of operating costs and commissions for both years was
    (A) $1,000 million
    (B) $1,050 million
    (C) $1,100 million
    (D) $1,150 million
    (E) $1,155 million

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    limits660 Senior | Next Rank: 100 Posts
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    Post Sat Nov 04, 2006 6:21 am
    Let x be the operating a commission costs the year before

    x * 1.1 = 550m

    x = 500m

    550m + 500m = 1050m

    therefore B

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    Last edited by limits660 on Sun Nov 05, 2006 5:36 pm; edited 2 times in total

    shahmau Junior | Next Rank: 30 Posts Default Avatar
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    Post Sun Nov 05, 2006 2:32 pm
    550m + 500m = 1050m

    logik1911 Newbie | Next Rank: 10 Posts Default Avatar
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    Post Sun Nov 05, 2006 2:36 pm
    the quickest way to solve this problem is to try a conversion factor

    550 represents 110%

    so...

    550 x 10% = 500 500+550 = 1050
    110%



    note: 550 being on top of 110% represents 550/110%

    limits660 Senior | Next Rank: 100 Posts
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    Post Sun Nov 05, 2006 5:35 pm
    wow

    im an idiot Embarassed

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    800guy Master | Next Rank: 500 Posts Default Avatar
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    Post Mon Nov 06, 2006 10:47 am
    OA:

    1998 = $500 M
    1999 = $550 M

    Sum = $ 1050 M
    Ans:B

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