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Solving for exponent.. please help :)

This topic has 1 member reply
maxim730 Senior | Next Rank: 100 Posts Default Avatar
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Solving for exponent.. please help :)

Post Wed Jan 17, 2007 3:59 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Q: (1/5)^m * (1/4)^18 = 1/ (2*10^35)

    m=?

    Ans is 35

    I have no idea how that was derived.

    Can someone please explain? Thanks


    Source: GMAT Prep

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    GMATDUD Senior | Next Rank: 100 Posts Default Avatar
    Joined
    16 Jan 2007
    Posted:
    62 messages
    Post Thu Jan 18, 2007 7:48 am
    (1/5)^M = 4^18/2*10^35
    = 2*2^35/2*10^35
    = 2^35/10^35
    = (2/10)^35
    = (1/5)^35

    Hence M = 35.

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