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Replies: 23   Last Post: Oct 1, 2013 3:22 PM

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 Brian Q. Hutchings Posts: 6,427 Registered: 12/6/04
Re: the surfer's value of pi (wokrking on proof
Posted: Oct 1, 2013 11:48 AM

I was going to say that about n;
it is not the same as casting out:
the digits always add, at least in base ten
-- he didn't elaborate --
to a multiple of three; so that
you can tell if the number is a multiple ... so,
I guess, you could "cast out some threes
to get 0, 1 or 2 (of course,
you can stop at 12, 60, 62 etc.

> You might want to re-read. The general case is that, in base "n",
>
> casting out "n-1" works. This is true, not just in base 10, where
>
> 9 is the square of a prime, but in all bases. For instance, in
>
> octal, one casts out 7s.
>
>
>
> --
>
> Michael F. Stemper
>
> If you take cranberries and stew them like applesauce they taste much
>
> more like prunes than rhubarb does.

Date Subject Author
9/30/13 JT
9/30/13 JT
9/30/13 JT
9/30/13 FredJeffries@gmail.com
9/30/13 JT
9/30/13 Brian Q. Hutchings
9/30/13 JT
9/30/13 JT
9/30/13 Rock Brentwood
9/30/13 JT
9/30/13 Michael F. Stemper
9/30/13 JT
9/30/13 JT
9/30/13 JT
9/30/13 Virgil
9/30/13 JT
9/30/13 Virgil
9/30/13 JT
9/30/13 Virgil
10/1/13 Brian Q. Hutchings
10/1/13 Brian Q. Hutchings
10/1/13 Michael F. Stemper
10/1/13 Brian Q. Hutchings
10/1/13 Karl-Olav Nyberg