Spooky

[Douglas Roberts-2]

Ok, folks.  Figure this one out.

--Doug

http://trunks.secondfoundation.org/files/psychic.swf

--
Doug Roberts
505-455-7333 - Office
505-670-8195 - Cell
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[Dan Kunkle]

1. Run through all of the numbers 10-99 and perform the given
equation: number - (first digit + second digit).

2. This will result in some subset of the numbers 0-99.

3. Every time you load the page, give each of these numbers the same
symbol and give all others a random symbol.

4.Pick the chosen symbol.

-Dan

On 12/16/05, Douglas Roberts <doug at parrot-farm.net> wrote:

> Ok, folks.  Figure this one out.
>
> --Doug
>
> http://trunks.secondfoundation.org/files/psychic.swf
>
> --
> Doug Roberts
> 505-455-7333 - Office
> 505-670-8195 - Cell
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at Mission Cafe
> lectures, archives, unsubscribe, maps at http://www.friam.org
>
>

--
[ http://www.ccs.neu.edu/home/kunkle/ ]

[Martin C. Martin]

Straight forward number theory:

Adding the digits of a number is called "casting out nines."  Basically,
by changing the number x*10 into x, you're subtracting 9*x.  Because
you're subtracting a multiple of 9, the result is the same as the
original mod 9.  By subtracting it from the original, the result must be
0 mod 9, i.e. a multiple of 9.  Notice that all multiples of 9 are the
same symbol...

People used to be taught casting out 9s as a checksum for arithmetic,
i.e. if you multiply to large numbers, you can check the result by
casting out 9s from the result, compared to casting out 9s of the two
original numbers and multiplying.

- Martin

Douglas Roberts wrote:

> Ok, folks.  Figure this one out.
>
> --Doug
>
> http://trunks.secondfoundation.org/files/psychic.swf
>
> --
> Doug Roberts
> 505-455-7333 - Office
> 505-670-8195 - Cell
>
>
> ------------------------------------------------------------------------
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at Mission Cafe
> lectures, archives, unsubscribe, maps at http://www.friam.org

[Douglas Roberts-2]

One day, when I grow up, I want to be a complexity scientist too.

;-}

On 12/16/05, Martin C. Martin <martin at metahuman.org> wrote:

>
> Straight forward number theory:
>
> Adding the digits of a number is called "casting out nines."  Basically,
> by changing the number x*10 into x, you're subtracting 9*x.  Because
> you're subtracting a multiple of 9, the result is the same as the
> original mod 9.  By subtracting it from the original, the result must be
> 0 mod 9, i.e. a multiple of 9.  Notice that all multiples of 9 are the
> same symbol...
>
> People used to be taught casting out 9s as a checksum for arithmetic,
> i.e. if you multiply to large numbers, you can check the result by
> casting out 9s from the result, compared to casting out 9s of the two
> original numbers and multiplying.
>
> - Martin
>
> Douglas Roberts wrote:
> > Ok, folks.  Figure this one out.
> >
> > --Doug
> >
> > http://trunks.secondfoundation.org/files/psychic.swf
> >
> > --
> > Doug Roberts
> > 505-455-7333 - Office
> > 505-670-8195 - Cell
> >
> >
> > ------------------------------------------------------------------------
> >
> > ============================================================
> > FRIAM Applied Complexity Group listserv
> > Meets Fridays 9a-11:30 at Mission Cafe
> > lectures, archives, unsubscribe, maps at http://www.friam.org
>
> ============================================================
> FRIAM Applied Complexity Group listserv
> Meets Fridays 9a-11:30 at Mission Cafe
> lectures, archives, unsubscribe, maps at http://www.friam.org
>

--
Doug Roberts
505-455-7333 - Office
505-670-8195 - Cell
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[Robert J. Cordingley]

Straightforward algebra :
a) xy is the 2 digit number
b) the process gives 10x+y-x-y = 9x
c) the same symbol is used  for all numbers divisible by 9, everything
else can be random.
d) each time the screen refreshes the symbol changes.
e) the biggest number you can get is 81 so all the symbols above that
can be completely random.

Robert Cordingley.


Douglas Roberts wrote:

> Ok, folks.  Figure this one out.
>
> --Doug
>
> http://trunks.secondfoundation.org/files/psychic.swf
>
> --
> Doug Roberts
> 505-455-7333 - Office
> 505-670-8195 - Cell
>
>------------------------------------------------------------------------
>
>============================================================
>FRIAM Applied Complexity Group listserv
>Meets Fridays 9a-11:30 at Mission Cafe
>lectures, archives, unsubscribe, maps at http://www.friam.org
>

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[Frank Wimberly]

Didn?t we have this same discussion very close to two years ago (Dec 18,
2003).  The thread was ?Believe this??.  Or am I wrong?

Frank

---
Frank C. Wimberly??????140 Calle Ojo Feliz???? Santa Fe, NM 87505
[phone] or [phone] (cell)
wimberly3 at earthlink.net or wimberly at andrew.cmu.edu or
wimberly at cal.berkeley.edu
?
?
?
-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf
Of Robert Cordingley
Sent: Friday, December 16, 2005 6:17 PM
To: The Friday Morning Applied Complexity Coffee Group
Subject: Re: [FRIAM] Spooky

Straightforward algebra :
a) xy is the 2 digit number
b) the process gives 10x+y-x-y = 9x?
c) the same symbol is used? for all numbers divisible by 9, everything else
can be random.
d) each time the screen refreshes the symbol changes.
e) the biggest number you can get is 81 so all the symbols above that can be
completely random.

Robert Cordingley.


Douglas Roberts wrote:

Ok, folks.? Figure this one out.

--Doug

http://trunks.secondfoundation.org/files/psychic.swf

--
Doug Roberts
505-455-7333 - Office
505-670-8195 - Cell




============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at Mission Cafe
lectures, archives, unsubscribe, maps at http://www.friam.org