Kid's Math

Discussion in 'Computer Support' started by johndieb@gmail.com, Sep 20, 2007.

  1. why? Guest

    On Sat, 22 Sep 2007 05:31:22 -0400, phrogee wrote:

    <snipped single line blanks>

    >"why?" <fgrirp*sgc@VAINY!Qznq.fpvragvfg.pbz> wrote in message
    >news:...
    >> On 21 Sep 2007 02:35:55 GMT, Blinky the Shark wrote:
    >>>why? wrote:
    >>>> On Thu, 20 Sep 2007 19:19:02 GMT, dadiOH wrote:
    >>>>> wrote:
    >>>>>> Problem 2. Supply the missing numbers.
    >>>>>> 120 60 180 90 _____ _____ 405
    >>>>>Oh, all right...270 135
    >>>> What's the point without how.
    >>>The point is the kid learning how to do this himself. :)

    >> Doesn't giving the answer avoid having to get the 'how'? Not posting
    >> either was the point :)
    >> Me

    >OK> Here's an answer received from "Math Forum@Drexel".
    >Does this help?
    >120 60 180 90 666 666 405. Obviously, the sequence is the polynomial


    LOL 666 666 :)

    >(2990160 - 6888924 x + 5902372 x^2 - 2446935 x^3 + 525955 x^4 - 56181
    >x^5 + 2353 x^6) / 240
    >evaluated at x=1, x=2, x=3, etc.


    Me
    why?, Sep 22, 2007
    #21
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  2. dadiOH Guest

    why? wrote:
    > On Sat, 22 Sep 2007 18:44:53 GMT, dadiOH wrote:
    >
    >> why? wrote:
    >>> On Sat, 22 Sep 2007 10:58:37 GMT, dadiOH wrote:
    >>>
    >>>> why? wrote:
    >>>>> On Thu, 20 Sep 2007 19:19:02 GMT, dadiOH wrote:
    >>>>>
    >>>>>> wrote:
    >>>>>>
    >>>>>>> Problem 2. Supply the missing numbers.
    >>>>>>>
    >>>>>>> 120 60 180 90 _____ _____ 405
    >>>>>>
    >>>>>> Oh, all right...270 135
    >>>>>
    >>>>> What's the point without how.
    >>>>>
    >>>>> Me
    >>>>
    >>>>
    >>>> 1. sum of two preceding (180 + 90 = 270)
    >>>> 2. result divided by 2 (270/2 = 135)
    >>>
    >>> It's simpler than that, don't need the addition, although it's an
    >>> alternative option it wasn't the 1 I saw right away.
    >>>
    >>> I started with step 2 in place of your step 1. Then see what
    >>> happens :)

    >>
    >> You mean...
    >>
    >> 1.5 * 90 = 135
    >> 1.5 * 180 = 270

    >
    > Yes, only 1 operation the same for each pair.


    Simpler, true. OTOH, it involves a decimal point and those can lead
    to fried brains and that can lead to polynomials :)


    --

    dadiOH
    ____________________________

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    LP/cassette and tips & tricks on this and that.
    Get it at http://mysite.verizon.net/xico
    dadiOH, Sep 23, 2007
    #22
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  3. why? Guest

    X-No-Archive: Yes
    On Sun, 23 Sep 2007 11:29:11 GMT, dadiOH wrote:

    >why? wrote:
    >> On Sat, 22 Sep 2007 18:44:53 GMT, dadiOH wrote:
    >>
    >>> why? wrote:
    >>>> On Sat, 22 Sep 2007 10:58:37 GMT, dadiOH wrote:
    >>>>
    >>>>> why? wrote:
    >>>>>> On Thu, 20 Sep 2007 19:19:02 GMT, dadiOH wrote:
    >>>>>>
    >>>>>>> wrote:
    >>>>>>>
    >>>>>>>> Problem 2. Supply the missing numbers.
    >>>>>>>>
    >>>>>>>> 120 60 180 90 _____ _____ 405
    >>>>>>>
    >>>>>>> Oh, all right...270 135
    >>>>>>
    >>>>>> What's the point without how.


    >>>>> 1. sum of two preceding (180 + 90 = 270)
    >>>>> 2. result divided by 2 (270/2 = 135)
    >>>>
    >>>> It's simpler than that, don't need the addition, although it's an
    >>>> alternative option it wasn't the 1 I saw right away.
    >>>>
    >>>> I started with step 2 in place of your step 1. Then see what
    >>>> happens :)
    >>>
    >>> You mean...
    >>>
    >>> 1.5 * 90 = 135
    >>> 1.5 * 180 = 270

    >>
    >> Yes, only 1 operation the same for each pair.

    >
    >Simpler, true. OTOH, it involves a decimal point and those can lead
    >to fried brains and that can lead to polynomials :)


    Okay so expand it to
    /2 , *3 , /2 , *3 and so on.

    Then you don't get decimals and you don't need to work on number pairs.

    Me
    why?, Sep 23, 2007
    #23
  4. Aardvark Guest

    On Sat, 22 Sep 2007 12:10:56 -0500, who'sthat wrote:

    > But you have to choose the best answer.


    The 'best' anything is always subjective.

    --
    Registered Linux User 413057.
    Both Mandriva 2007.1 and Ubuntu 7.04
    You can have it all. My empire of hurt.

    Liverpool F.C.-more European Cups than all
    the other English teams put together :)
    Aardvark, Sep 24, 2007
    #24
  5. who'sthat Guest

    On Sun, 23 Sep 2007 23:16:38 GMT, Aardvark <>
    wrote:

    >On Sat, 22 Sep 2007 12:10:56 -0500, who'sthat wrote:
    >
    >> But you have to choose the best answer.

    >
    >The 'best' anything is always subjective.


    True. I guarantee that a polynomial is not the best answer to that
    question
    who'sthat, Sep 24, 2007
    #25
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