piclist 2001\06\05\021942a >
Thread: ENOUGH! (was: "Re: [OT]: Brain Burp Rounding??")
www.piclist.com/techref/index.htm?key=brain+burp+rounding
picon face BY : Russell McMahon email (remove spam text)



> >Quite coincidentally, Pi for most any engineering purpose is 355/113
> >High by about 0.00000026676...
> >Easy to remember 113355 and split it in two and divide.
> >Courtesy HP long ago.
> >
> >
> Depending on the accuracy required, 22/7 can work also. While not as
> accurate as 355/113, it's only high by about 0.001264489... (about 0.04%).
I
> find the 22/7 easier to remember. :=)
> Courtesy of a Forth Interest Group member, also long ago.


Seriously, I think 113355 is easier for those who have no real grasp of what
is going on but want to use Pi. I have met a few.
Some cannot remember 22/7 and have no idea what the 'real" number is.

You take them down the     "11   33  55" path and drum the pattern  in.
All odd numbers, Isn't that odd etc,
Then just divide in two and divide larger by smaller.
113355
355/113
bingo.

I personally just remember it to 14 places (which is where my brain decided
to stop for reasons known only to itself) which has been good enough fro
everything so far. 3.14159265358979

More than any Engineer will ever need.

RM

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Subject (change) ENOUGH! (was: "Re: [OT]: Brain Burp Rounding??")

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