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  1. #1
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    Jun 2006
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    Postman problem.

    A postman delivers the mail in the small village Ten houses. This village has only one street with exactly ten houses, numbered from 1 up to and including 10.

    In a certain week, The postman did not deliver any mail at two houses in the village; at the other houses he delivered mail three times each. Each working day he delivered mail at exactly four houses.

    The sums of the house numbers where he delivered mail were:
    on Monday: 18
    on Tuesday: 12
    on Wednesday: 23
    on Thursday: 19
    on Friday: 32
    op Saturday: 25
    on Sunday: he never works

    Which two houses didn't get any mail that week?


  2. #2
    Contributing Member
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    Sep 2006
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    962

    Re: Postman problem.

    This question contains several answers...

    Answers are (2,10) (3,9) (4,6) (5,7)

    Explanation...

    total number of post of the week...18+12+23+19+32+25 = 129.

    He delivered three time per house...so divide the total post by threee..

    so 129/3= 43.

    If he delivered all the house then the total is: 1+2+3+4+5+6+7+8+9+10=55

    So he missed the house numbers total is: 55-43=12.

    Any combination of 12 will comes to an answer...That is i mentioned above...

    -suresh


  3. #3
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    Re: Postman problem.

    Suresh,

    This problem has only one answer


  4. #4
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    Re: Postman problem.

    James,

    What about the above answers...?

    Anything wrong with the answers...it is satisfied all of your condition mentioned in that question..


  5. #5
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    410

    Re: Postman problem.

    yep. you can sort out three of ur 4 answers...proceed further with ur answers.


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