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Long division

  1. May 25, 2006 #1
    I found in this book the other day the following puzzle (but the book did not give any answer), if someone can do this could you explain, step by step proceedings please as I just get no where.

    The question is this:

    We are given the following division (each x is an unknown value)

    xx / xxxxxxx = xx8xx

    Hint: Think the long division way!
     
  2. jcsd
  3. May 25, 2006 #2

    berkeman

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    Each "x" is the same exact digit? Then the answer would have to be less than 1, wouldn't it?
     
  4. May 25, 2006 #3
    You mean each x is a distinct digit (not necessarily the same) ?

    Surely, decimal points are permissible, but in that case the solutions must be infinite, or are all the x's the same digit ?
     
  5. May 25, 2006 #4
    Yes each x is a distinct digit (not necessarily the same). Yes I forgot to say sorry sorry!
    There is a remainder of xxx (3 dictinct digits)
     
    Last edited: May 25, 2006
  6. May 25, 2006 #5

    berkeman

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    How can xx / xxxxxxx have a remainder? The numerator has to be greater than the denominator for there to be a remainder, no?
     
  7. May 25, 2006 #6
    Sorry!

    Of course it is:

    xxxxxxx / xx = xx8xx with remainder of xxx
     
  8. May 25, 2006 #7

    matt grime

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    I think you're supposed to read it as divide xxxxxxx some 7 digit number (presumably the leading digits involved are never zero) by some two digit number. The quotient is 5 digits and the middle one is 8. Now, it doesn't make sense to say the remainder is three digits because the remainder on dividing by a 2 digit number is a one or 2 digit number.
     
  9. May 25, 2006 #8

    berkeman

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    Kinda' takes the fun out of the puzzle to have it misstated so many times, eh?
     
  10. May 25, 2006 #9
    dead post - ignore me
     
    Last edited: May 25, 2006
  11. May 25, 2006 #10
    well I managed to work it out anyway:

    1089708 / 12 = 90809 with remainder of 108.

    So there you go! :-)
     
  12. May 25, 2006 #11

    matt grime

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    But 1089709 / 12 =90809 with a remainder of 109

    exercise: find a load more examples....

    Hint: start with any number, like 88888, now let's pick some two digit number, oh, like 88, what's 88*88888... it's 7822144, now add you favourite 3 digit number, like 100, and you've got another solution...

    so, what ought to be the real statement of the problem?
     
    Last edited: May 25, 2006
  13. May 25, 2006 #12

    Inversion over your original post?

     
  14. May 25, 2006 #13
    Not sure MattGrime
     
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