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Kid's Math

 
 
why?
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      09-21-2007

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:
>>
>>>(E-Mail Removed) 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
 
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Blinky the Shark
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      09-21-2007
why? wrote:
>
> 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:
>>>
>>>>(E-Mail Removed) 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


IMO.

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phrogee
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      09-22-2007

"why?" <fgrirp*sgc@VAINY!Qznq.fpvragvfg.pbz> wrote in message
news:(E-Mail Removed)...
>
> 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:
>>>
>>>>(E-Mail Removed) 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 http://www.velocityreviews.com/forums/(E-Mail Removed) received from "Math Forum@Drexel".
Does this help?

120 60 180 90 666 666 405. Obviously, the sequence is the polynomial

(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.


 
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dadiOH
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      09-22-2007
why? wrote:
> On Thu, 20 Sep 2007 19:19:02 GMT, dadiOH wrote:
>
>> (E-Mail Removed) 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)

1. sum of two preceding (270 + 135 = 405)
etc.


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dadiOH
____________________________

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why?
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      09-22-2007

On Sat, 22 Sep 2007 10:58:37 GMT, dadiOH wrote:

>why? wrote:
>> On Thu, 20 Sep 2007 19:19:02 GMT, dadiOH wrote:
>>
>>> (E-Mail Removed) 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

<snip>

Me
 
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who'sthat
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      09-22-2007
On Sat, 22 Sep 2007 05:31:22 -0400, "phrogee" <(E-Mail Removed)>
wrote:

>
>"why?" <fgrirp*sgc@VAINY!Qznq.fpvragvfg.pbz> wrote in message
>news:(E-Mail Removed).. .
>>
>> 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:
>>>>
>>>>>(E-Mail Removed) 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 (E-Mail Removed) received from "Math Forum@Drexel".
>Does this help?
>
>120 60 180 90 666 666 405. Obviously, the sequence is the polynomial
>
>(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.
>

Polynomial? This is a standard question on a college entrance exam and
you'd fail miserably.
 
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Pennywise@DerryMaine.Gov
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      09-22-2007
who'sthat <who'sthat@don'tknow.com> wrote:

>On Sat, 22 Sep 2007 05:31:22 -0400, "phrogee" <(E-Mail Removed)>
>wrote:
>
>>
>>"why?" <fgrirp*sgc@VAINY!Qznq.fpvragvfg.pbz> wrote in message
>>news:(E-Mail Removed). ..
>>>
>>> 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:
>>>>>
>>>>>>(E-Mail Removed) 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 (E-Mail Removed) received from "Math Forum@Drexel".
>>Does this help?
>>
>>120 60 180 90 666 666 405. Obviously, the sequence is the polynomial
>>
>>(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.


>Polynomial? This is a standard question on a college entrance exam and
>you'd fail miserably.


Seems right...

"> P.S. There is no unique answer to problems like
> these.


Even more, any number can be considered the next number,
it is sufficient to choose an adequate Lagrange interpolating
polynomial."
http://groups.google.com/group/sci.m...8708c2335824bb
http://tinyurl.com/yvwvyu
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who'sthat
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      09-22-2007
On Sat, 22 Sep 2007 10:05:03 -0700, (E-Mail Removed) wrote:

> who'sthat <who'sthat@don'tknow.com> wrote:
>
>>On Sat, 22 Sep 2007 05:31:22 -0400, "phrogee" <(E-Mail Removed)>
>>wrote:
>>
>>>
>>>"why?" <fgrirp*sgc@VAINY!Qznq.fpvragvfg.pbz> wrote in message
>>>news:(E-Mail Removed) ...
>>>>
>>>> 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:
>>>>>>
>>>>>>>(E-Mail Removed) 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 (E-Mail Removed) received from "Math Forum@Drexel".
>>>Does this help?
>>>
>>>120 60 180 90 666 666 405. Obviously, the sequence is the polynomial
>>>
>>>(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.

>
>>Polynomial? This is a standard question on a college entrance exam and
>>you'd fail miserably.

>
>Seems right...
>
>"> P.S. There is no unique answer to problems like
>> these.

>
>Even more, any number can be considered the next number,
>it is sufficient to choose an adequate Lagrange interpolating
>polynomial."
>http://groups.google.com/group/sci.m...8708c2335824bb
> http://tinyurl.com/yvwvyu


But you have to choose the best answer.
 
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dadiOH
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Posts: n/a
 
      09-22-2007
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:
>>>
>>>> (E-Mail Removed) 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

?


--

dadiOH
____________________________

dadiOH's dandies v3.06...
....a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico



 
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why?
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      09-22-2007

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:
>>>>
>>>>> (E-Mail Removed) 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.

Me
 
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