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Thread: integer ordered pair in combination

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    integer ordered pair in combination










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    Re: integer ordered pair in combination

    Quote Originally Posted by juantheron View Post








    It isn't exactly clear what you are asking. Nor is your reasoning coherent in places.

    Reasoning (although on close inspection, doesn't look like that is what is the question
    ,


    Second interpretation (which I think is what you are getting at)





    (Have a think why don't we need to consider a=7?)



    This is sufficient. (Why?). So we have (120,1); (120,119); (16,2); (16,14); (10,3); (10,7). So answer required is 6.
    (excuse the informal/incompleteness of this)

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