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Thread: Simple one.

  1. #1
    Expert Member
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    Jun 2006
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    410

    Simple one.

    There is a number that is 3 times the sum of its digits. What is this number?


  2. #2
    Expert Member
    Join Date
    Jun 2006
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    410

    Re: Simple one.

    just want to bring this to the first page.

    -- James.


  3. #3
    Expert Member
    Join Date
    Jun 2006
    Answers
    410

    Re: Simple one.

    let us say the number is xy

    It is given that
    3(x+y) = 10x +y
    => 2y = 7x
    => x/y =2/7

    x and y are single digit integers so only possible vlaues of x and y are 2 and 7 respectively.

    so the number is 27.

    -- James


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