1. Offtopic; Useless memorisations. Was: Re: Quiz
On Wed, 21 Oct 1998, Jeff Zeitlin wrote:
> >iv) BONUS question. Where have I got the "Start" numbers from? :)
>
> The first 24 digits of pi, including the "3" before the decimal
> point. Do you actually have it memorized that far?
<inflate_head>
Uh-huh.
3.141 592 653 589 793 238 462 643 383 9 [02 75?]
So what are these? :)
0.083 3-recurring
0.090 909 recurring
0.1
0.111 recurring
0.125
0.142 857 recurring (and all shifts of digits)
0.166 6-recurring
0.2
0.25
0.333 recurring
0.5
0.707 1 [I have to work the rest out using the below :)]
0.866 0 [Ditto]
1.414 213 56
1.609 334
1.618 033 988 74
1.732 050 808
2.236 067 977 48
2.718 281 828 4
22/7, 220/71, and 355/113
9.806 65
42 :)
186,283 [or 670,615,243]
16777216,,, 1024576,,, 262144, 131076, 65536, [49152,] 32768, 16384, 8192,
4096, 2048, 1024, 512...
28/06/1977 ;)
1-Methyl-2,4,6-Trinitro-Benzene
Antidisestablishmentarianism
Deoxyribonucleic Acid [Adenine, Thymine, Cytosine, Guanine. (Uracil)]
Methylenedeoxymethamphetamine [oo-er]
</i_h>
...and ton[ne]s of other stuff like my National Insurance number
(or to Americanize - "Social Security") student number and bank account
stuff.
Carl
--
Carl R White -- Final Year Computer Science at the University of Bradford
E-mail...: cyrek- at -bigfoot.com -- Remove the hyphens before mailing. Ta :)
URL......: http://www.bigfoot.com/~cyrek/
Ykk rnyllaqur rgiokc cea nyemdok ymc giququezka caysgr -- B.Q.Vgesa
2. Re: Offtopic; Useless memorisations. Was: Re: Quiz
- Posted by Jeff Zeitlin <jzeitlin at CYBURBAN.COM>
Oct 23, 1998
-
Last edited Oct 24, 1998
On Fri, 23 Oct 1998 00:01:02 -0400, "Carl R. White"
<C.R.White at SCM.BRAD.AC.UK> wrote:
>On Wed, 21 Oct 1998, Jeff Zeitlin wrote:
>> >iv) BONUS question. Where have I got the "Start" numbers from? :)
>> The first 24 digits of pi, including the "3" before the decimal
>> point. Do you actually have it memorized that far?
><inflate_head>
>Uh-huh.
>3.141 592 653 589 793 238 462 643 383 9 [02 75?]
>So what are these? :)
>0.083 3-recurring
reciprocal 12
>0.090 909 recurring
reciprocal 11
>0.1
reciprocal 10
>0.111 recurring
reciprocal 9
>0.125
reciprocal 8
>0.142 857 recurring (and all shifts of digits)
reciprocal 7
>0.166 6-recurring
reciprocal 6
>0.2
reciprocal 5
>0.25
reciprocal 4
>0.333 recurring
reciprocal 3
>0.5
reciprocal 2
>0.707 1 [I have to work the rest out using the below :)]
sin (pi reciprocal 4), or square root (reciprocal 2)
>0.866 0 [Ditto]
>1.414 213 56
square root 2
>1.609 334
conversion factor miles to kilometers
>1.618 033 988 74
golden ratio
>1.732 050 808
square root 3
>2.236 067 977 48
square root 5
>2.718 281 828 4
e (napieran/natural logarithm base)
>22/7, 220/71, and 355/113
successive rational approximations to pi
>9.806 65
nominal acceleration due to gravity at Earth's surface, meters
per second per second
>42 :)
The answer to life, the universe, and everything. I read them,
too.
>186,283 [or 670,615,243]
I learned it as 186,282, but it's the speed of light in vacuo in
miles per second. The 670e6 number is the speed in miles per
hour.
>16777216,,, 1024576,,, 262144, 131076, 65536, [49152,] 32768, 16384, =
8192,
>4096, 2048, 1024, 512...
I recognize the numbers; I don't see the significance of the
series.
>28/06/1977 ;)
So, you're 21 years 3 months 25 days old as I write this?
>1-Methyl-2,4,6-Trinitro-Benzene
Don't recognize this. It would take me a little time to come up
with the structure. I used to know this stuff; with a little
work, I could probably dredge it up out of what used to be my
memory.
>Antidisestablishmentarianism
The longest non-medical word in the English language.
>Deoxyribonucleic Acid [Adenine, Thymine, Cytosine, Guanine. (Uracil)]
The stuff that defines what we are. The bracketed names are the
components of DNA.
The longest name in the world for a community of any size. It's
in Wales. It even has a train station which has a sign that
spells it out in full; on most maps it's shown as Llanfair. Can
you pronounce it? (I can't.)
>Methylenedeoxymethamphetamine [oo-er]
Never heard of it; is it illegal in the USA?
></i-h>
--
Jeff Zeitlin
jzeitlin at cyburban.com
3. Re: Offtopic; Useless memorisations. Was: Re: Quiz
On Fri, 23 Oct 1998, Jeff Zeitlin wrote:
> On Fri, 23 Oct 1998 00:01:02 -0400, "Carl R. White"
> <C.R.White at SCM.BRAD.AC.UK> wrote:
>
> ><inflate_head>
> >186,283 [or 670,615,243]
> I learned it as 186,282, but it's the speed of light in vacuo in
> miles per second. The 670e6 number is the speed in miles per
> hour.
I usually remember the longer number, and calculate the smaller from it!
There's a pattern in the digits:
[6] 0 1 2 3
7 6 5 4
-----------
670615243 :)
That and the fact that my 'phone number starts "670" (and that my
'phone number's prime, but that's a different matter) :)
However I will admit that both are approximated to fit in with the
rule-of-thumb.
> >16777216,,, 1024576,,, 262144, 131076, 65536, [49152,] 32768, 16384, 8192,
> >4096, 2048, 1024, 512...
>
> I recognize the numbers; I don't see the significance of the
> series.
Powers of two from 2^24 to 2^9. ",,," means I've forgotten :)
[] means "in the middle"
...256, 128, 64, 32, 16, 8, 4, 2, 1, 0.5, 0.25, 0.125, 0.0625, 0.03125,
0.015625.
And there's 2^8 to 2^-6.
> >28/06/1977 ;)
> So, you're 21 years 3 months 25 days old as I write this?
Not any more :)
> >1-Methyl-2,4,6-Trinitro-Benzene
>
> Don't recognize this. ...
Trinitrotoluene [TNT] :)
> >Llanfairpwllgwyngyllgogerychwrindrobwllllantysiliogogogoch
> Can you pronounce it? (I can't.)
Just about.
> >Methylenedeoxymethamphetamine [oo-er]
> Never heard of it; is it illegal in the USA?
Probably. It's AKA "MDMA", "XTC" or "Ecstasy".
</i_h>
--
Carl R White -- Final Year Computer Science at the University of Bradford
E-mail...: cyrek- at -bigfoot.com -- Remove the hyphens before mailing. Ta :)
URL......: http://www.bigfoot.com/~cyrek/
Ykk rnyllaqur rgiokc cea nyemdok ymc giququezka caysgr -- B.Q.Vgesa
