HDTenEightyP/NetNews huggingface dataset:
From: sb102760@ntuvax
Newsgroups: rec.puzzles
Subject: Re: Story Puzzle
Date: 9 Oct 92 11:18:38 GMT
Organization: Nanyang Technological University - Singapore

In article <int470u.718541096@aurora.cc.monash.edu.au>, int470u@aurora.cc.monash.edu.au (Wes Jones) writes:
> This is a puzzle my maths teacher asked back in high school:
> 
> A mathematician and a magician were walking down the road together.
> The logician turned to the mathematician, and said, "The sum of the
> ages of my three children, which can be considered integers, is 13,
> and the product is the number on that bus over there.  What are the
> ages?"
> 
> The mathematician, after some thought, replied that he did not have
> enough information to solve the problem.  The logician then said that
> his oldest child was learning to play the piano.  The mathematician
> then told the logician the ages.
> 
> What are the ages ?

	Would I need to know the number of the bus, or at least the
	kind of number buses have in wherever the location of the
	story is ?

ET
Newsgroups: rec.puzzles
From: dant@techbook.com (Dan Tilque)
Subject: Re: Height of a building
Organization: Pseudopolis Yard
Date: Thu, 15 Oct 1992 07:33:11 GMT

imc@comlab.ox.ac.uk (Ian Collier) writes:
> ronnie@cisco.com (Ronnie B. Kon) wrote:
>
>>|> Then again, you could simply go into the building, measure the
>>|> height of each step between the floor and the ceiling, and add
>>|> them all up.
>
>[Notice that the above answer relies on a person being able to make accurate
>measurements in metric with a 12 inch imperial ruler].

If I remember correctly, the puzzle said that the stairway was locked
and that one had to take the elevator to the top.  I believe this
provision was made to exclude this solution.

Someone else wondered why it was such a dark night (no moon, cloudy
skies, I believe).  This seems to be there to exclude the standard
answer we all learned in elementary geometry involving measuring shadows
and conguent triangles.

---
Dan Tilque    --     dant@techbook.com
From: jimhsu@athena.mit.edu (Jimmy M.D. Hsu)
Newsgroups: rec.puzzles
Subject: Re: Chess problem 2
Keywords: queens checkmate
Date: 10 Oct 92 02:23:08 GMT
Article-I.D.: athena.1992Oct10.022308.7469
Organization: Massachusetts Institute of Technology

Yes, but how did that king get there?  :)  :)  :)

I know, I know.  That's not part of the question.
It's also impossible to get more than 9 queens.


--
Jim Hsu
MIT
Newsgroups: rec.puzzles
From: sethb@fid.morgan.com (Seth Breidbart)
Subject: Re: TRAPPED BUBBLE
Organization: my opinions only
Date: Wed, 14 Oct 1992 20:28:28 GMT

In article <1bhahsINNc0@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
>In article <10002@ncrwat.Waterloo.NCR.COM>, tjgerman@53iss6.Waterloo.NCR.COM (Trevor German) writes:
>>		Take a cylinder of _incompressible_ fluid. Attach a
>>	balloon to the lid of the cylinder and seal the cylinder
>>	with the lid such that there is no air trapped within.
>
>I assume the fluid also cannot expand.

I assume the balloon is attached in such a way that the fluid can pour
into it.

>>		Now flip the cylinder upside down.
>>
>>		The question is, what happens to the baloon. Does it
>>	get bigger or smaller. What happens to the pressure in the 
>>	baloon, does it change. What are the thermal effects if any.
>
>The balloon remains the same size.  Since the volume of the fluid filling the
>rest of the cylinder can't change, and the volume of the cylinder is fixed, the
>volume of the balloon can't change either.  Since the balloon's volume doesn't
>change, neither does the pressure.  There are no thermal effects.

Maybe.  The question is, what is the weight of the fluid per unit area
of the edge of the cylinder?  If this is less than 1 atmosphere,
nothing happens.  If this exceeds one atmosphere, some fluid enters
the balloon until the balloon exerts enough pressure to balance the
weight of the fluid (that is, balloon pressure + atmospheric pressure
= weight of fluid).  The pressure on the outside of the balloon is
still one atmosphere; the pressure on the inside of the balloon is
greater.  Stretching the rubber of the balloon has thermal effects.

>>		As a corolorary what would happen if the situation
>>	was reversed and the baloon was stuck to the bottom before
>>	the fluid was added, the tube sealed, and inverted.
>
>Same thing, except that as you filled the cylinder, the volume of the balloon
>would decrease.

Huh?  Now, the fluid pours into the balloon while the cylinder is
being filled, so you need more fluid than before.  When you turn the
cylinder over, there's no place for the fluid to go, so some of it
stays in the balloon.  However, the shape of the balloon changes.

Seth		sethb@fid.morgan.com
Newsgroups: rec.puzzles,sci.math
From: al037@cleveland.Freenet.Edu (Dave Polewka)
Newsgroups: rec.puzzles
Subject: William Shakespeare -- anagrams
Date: 12 Oct 1992 16:22:28 GMT
Organization: Case Western Reserve University, Cleveland, OH (USA)
Reply-To: al037@cleveland.Freenet.Edu (Dave Polewka)
NNTP-Posting-Host: slc10.ins.cwru.edu



William Shakespeare -- anagrams
********************************
  1.  Mikhail was a sleeper.
  2.  Raisa: "We'll keep Misha!"
  3.  Premise: Allah is weak.
  4.  Shall I sweep Amerika?
  5.  We like A.A.! <sharp smile>
  6.  We'll make Asia perish!
  7.  I saw Shea kill Ampere!
  8.  I impale a lesser hawk.
  9.  A simple hiker saw ale.
 10.  I sear Ike's whale lamp.
 11.  Imp Law: raise a shekel.
 12.  Heim's Law: lase a piker!
 13.  Simile: We "Hep" as a lark.
*********************************
-- 
=======================
"Endeavor to persevere"
=======================
Newsgroups: rec.puzzles
From: "matthew drew" <mdrew@hammerhead.cs.indiana.edu>
Subject: Re: Dividing the plane
Organization: Indiana University, Bloomington
Date: Sun, 11 Oct 1992 16:12:57 -0500

Thus spake 90tms@eng.cam.ac.uk (T.M. Speight)
>In article <1992Oct11.044715.14475@math.toronto.edu>hsieh@math.toronto.edu
>(Paul Hsieh) writes:

>   In article <1b36afINN8so@uwm.edu> radcliff@csd4.csd.uwm.edu 
>(David G Radcliffe) writes:
>   >First an easy one:
>   >
>   >Divide the plane into three disjoint subsets so that every line
>   >intersects exactly two of them.

>   Colour every point (0,x), x real and non zero, BLUE.  Colour (0,0) GREEN.
>   Colour the rest RED.

>No! A line parallel to the x-axis would then pass only through the red
>region.

>90tms@uk.ac.cam.eng      Cambridge University
>Toby Speight             Engineering Department

Change it to:
  Color (0,x) and (x,0), x real and nonzero, BLUE.
  Color (0,0) GREEN.
  Color the rest RED.
This fixes things nicely.

--
                          Matthew C. Drew
                       (mdrew@cs.indiana.edu)
From: sb102760@ntuvax
Newsgroups: rec.puzzles
Subject: Re: STORY PUZZLES
Date: 9 Oct 92 11:31:48 GMT
Organization: Nanyang Technological University - Singapore

In article <1992Oct5.145842.1@crcvms.unl.edu>, phoffman@crcvms.unl.edu writes:

> Two men were having lunch when they spied their respective wives across the
> street from where they ate. After paying the tab, they steped across the 
> street to greet them. Suddenly, a truck came racing around the corner, striking
> one of the men. The hapless fellow realized he was dying, but before succumbing,
> he pulled a revolver from his bloody jacket and shot his lunch companion to
> death.
> How come?

	Let me guess, hmm, the 2 men are twins, and the dying man, in order
	to prevent his twin from taking advantage of his death in confusing
	the identity of which one of the twin actually died, (perhaps he
 	the dying one has much that can be usurped, property, title,
	wealth and even family by a pretender). Assume that finger prints
	and other positive id are not available.

	Another situation is this, the dying man was a guard who was assigned
	to keep the other man in custody. Before dying, in order that the
	other man might not escape, he killed him.

	Much variations may be played along these 2 lines, and I suspect
	there are others, perhaps less melodramatic.

	If I am in my optimistic mood, I might guess that the dying man loves
	the other (not in homosexual context) and 2 cases are possible :
	i) he does not want them to be seperated.
	ii) the other man (perhaps brother) relies on him for blood transfusion
	    because of terminal illness, and to prevent pro-longed suffering
	    in absence of the only donor, he killed him.

	I would like to hear from the post-er of this puzzle. I appreciate
	the most simple kind of explanations, without too much assumptions.

ET
From: ronnie@cisco.com (Ronnie B. Kon)
Newsgroups: rec.puzzles
Subject: Re: Height of a building
Date: 9 Oct 1992 03:46:49 GMT
Organization: cisco Systems, Incorporated
Distribution: world
NNTP-Posting-Host: lager.cisco.com

In article <1992Oct8.235856.6059@aurora.com>, isaak@aurora.com (Mark Isaak) writes:
|> In article <1992Oct7.192415.217922@ns1.cc.lehigh.edu> dsbb@ns1.cc.lehigh.edu (D. SPENCER BEECHER) writes:
|> >How would you accurately measure the height of a ten or twelve
|> >story building?
|> >Tools include ... 5 thumb tacks, 12 m acrylic tube, paper, string, ...
|> 
|> Make a helicopter-whirligig thingie out of some paper and a thumb
|> tack.  Time how long it takes to fall 12 meters, using either the
|> watch or a pendulum.  Take it to the top of the building and time
|> how long it takes to fall to the ground.
|> 
|> Then again, you could simply go into the building, measure the
|> height of each step between the floor and the ceiling, and add
|> them all up.

Boy, am I the only one to see the obvious answer?  You drop the
fishbowl off the building and watch to see when it hits.  Then you
count until you hear the impact.  From there, it's simple arithmetic.

-------------------------------------------------------------------------------
Ronnie B. Kon           | "Boy, they were big on crematoriums, weren't they?"
ronnie@cisco.com        |
(415) 688-4592          |           -- George Bush at Auschwitz, Sept 1989
-------------------------------------------------------------------------------
Newsgroups: rec.puzzles
From: dwr2560@zeus.tamu.edu (RING, DAVID WAYNE)
Subject: Re: blue eyes, brown eyes revisited.
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Sat, 17 Oct 1992 00:47:00 GMT

wang@math.psu.edu (Feng Wang) writes...
>If he returns within 300 days, nobody has died yet, is there any way
>that he could make it up by saying something and save 300 lives (or
>at least part of them)?  I can't think of one solution.  Is there
>any solution at all?

If he revisits after N days and tells N+1 blue-eye's their eye color then
only those N+1 will die. Unless it's obvious that he just came back to save
one or more lives. :)

Dave Ring
dwr2560@zeus.tamu.edu
Newsgroups: rec.puzzles
From: hmasum@alfred.carleton.ca (Hassan Masum)
Subject: 9 Squares Touching 10th
Organization: Carleton University
Date: Fri, 9 Oct 1992 05:52:52 GMT

It's easy to place 8 nonoverlapping squares on a plane so that they
all touch a 9th, like so:
                              x x x
                              x x x
                              x x x
(all squares same size).

Is it possible to have 10 nonoverlapping, congruent squares in the
plane such that nine of them touch the 10th?

( Try to maximize that ever-elusive elegance factor!  \___/ )

-- 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
              "Artificial Intelligence Beats Real Stupidity"
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Xref: sparky rec.puzzles:6718 rec.puzzles.crosswords:696
From: clong@remus.rutgers.edu (Chris Long)
Newsgroups: rec.puzzles,rec.puzzles.crosswords
Subject: New Double 7-Square
Date: 9 Oct 92 17:34:28 GMT
Followup-To: rec.puzzles
Organization: Rutgers Univ., New Brunswick, N.J.


I found several nice double 7-squares yesterday.  One such is:

  smashes
  pontine
  ingrate
  relater
  asinine
  lingots
  sagenes

All words are uncapitalized, solid, and in NI2, so this might be
the best double-7 known (according to NPL member Rom Dos the
previous best had only 11 words from NI2).
-- 
Chris Long, 265 Old York Rd., Bridgewater, NJ  08807-2618
From: chris@questrel.com (Chris Cole)
Newsgroups: rec.puzzles
Subject: Re: Word that Ends with 5 Consecutive Consonants
Date: 8 Oct 92 04:35:33 GMT
Organization: Questrel, Inc.

In article <1992Oct7.223616.17845@nas.nasa.gov> asimov@wk223.nas.nasa.gov (Daniel A. Asimov) writes:
>I am thinking of a word which ends with 5 consecutive
>consonants (no, none of them is a 'w' or a 'y').
>There is only one vowel in the entire word.
>Finally, the word is Scrabble-admissible, and
>not particularly uncommon.
>Can you think of a word fitting this description?

This question is on the rec.puzzles Frequently Asked Questions List (FAQL).
To request a copy of the index to the FAQL, send a letter to
faql-request@questrel.com
containing the line:
send index

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The FAQL has been posted to news.answers.  News.answers is archived in
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Postings are located in the anonymous ftp directory
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Other news.answers/FAQ archives (which carry some or all of the FAQs
in the pit-manager archive) are:

	archive.cs.ruu.nl [131.211.80.5] in the anonymous ftp
		directory /pub/NEWS.ANSWERS (also accessible via mail
		server requests to mail-server@cs.ruu.nl)
	cnam.cnam.fr [192.33.159.6] in the anonymous ftp directory /pub/FAQ
	ftp.uu.net [137.39.1.9 or 192.48.96.9] in the anonymous ftp
		directory /usenet
	ftp.win.tue.nl [131.155.70.100] in the anonymous ftp directory
		/pub/usenet/news.answers
	grasp1.univ-lyon1.fr [134.214.100.25] in the anonymous ftp
		directory /pub/faq (also accessible via mail server
		requests to listserv@grasp1.univ-lyon1.fr), which is
		best used by EASInet sites and sites in France that do
		not have better connectivity to cnam.cnam.fr (e.g.
		Lyon, Grenoble)

Note that the periodic posting archives on pit-manager.mit.edu are
also accessible via Prospero and WAIS (the database name is "usenet"

From the FAQL, the answer is:
********
english/records/spelling/single.words.s
********
Word Records from Webster's Third

Vowels
longest one vowel strengths (9,1)
From: rob@dexter.psych.umn.edu (Robert Stephens)
Newsgroups: rec.puzzles
Subject: Can you solve this?
Date: 16 Oct 92 16:40:42 GMT
Article-I.D.: news2.1992Oct16.164042.6456
Organization: University of Minnesota



A friend has taunted me with this puzzle:

McElroy, who holds a law degree

Lawyers are dangerous.





(end of message)

Can somebody please E-mail me with ANY
suggestions as to its significance?

Thanks in advance.

-- 
---------------------------------------------
Robert C. Stephens   rob@dexter.psych.umn.edu
---------------------------------------------
Human Factors Research Laboratory
University of Minnesota
60 Norris Hall
172 Pillsbury Dr. SE
Minneapolis, MN  55455
---------------------------------------------
Phone: (612) 626-7521     Fax: (612) 626-7496
---------------------------------------------

wow.
From: jerryd@hpgrla.gr.hp.com (Jerry Donovan)
Newsgroups: rec.puzzles
Subject: Re: Tell me more?
Date: 13 Oct 92 21:21:03 GMT
Organization: Hewlett-Packard, Greeley, CO

>Two good friends were walking in the woods on a hike, one was a mathematician,
>the other a logician.  The mathematician said, "The sum of the ages of
>my children is 12 years."

>The logician replied, "Don't tell me any more, there ages are: ... and ..."

>What were the ages and how did he know?

The quintuplets are 2 and the twins are 1.

Since they are good friends, he probably not only new their ages, but sends 
them birthday cards on their birthdays, and helped but the addition to the
house.

:-)

I'll probably be proven wrong, but me thinks there might be some information
missing.
From: imcc@cs.strath.ac.uk (Iain McCord)
Newsgroups: rec.puzzles
Subject: Re: blue eyes, brown eyes revisited.
Date: 16 Oct 92 18:07:42 GMT
Organization: Comp. Sci. Dept., Strathclyde Univ., Scotland.
X-Newsreader: Tin 1.1 PL5


 The logical respoe depends on how many blue-eyed islanders there are.
If there is only one, and he is at the boat, then he knows that he has
blue eyes and must die.  If there are more than one, then each already 
knows that there is someone on the island who has blue eyes.  In that
situation the visitor's statement will have no effect.

-- 

		~~~~~/\~~~~~
Iain McCord	~~~~/()\~~~~	Fri Oct 16 19:07:39 WET DST 1992
		~~~~~~~~~~~~
Newsgroups: rec.puzzles
From: int470u@aurora.cc.monash.edu.au (Wes Jones)
Subject: Story Puzzle
Organization: Monash University, Melb., Australia.
Date: Thu, 8 Oct 1992 10:44:56 GMT

This is a puzzle my maths teacher asked back in high school:

A mathematician and a magician were walking down the road together.
The logician turned to the mathematician, and said, "The sum of the
ages of my three children, which can be considered integers, is 13,
and the product is the number on that bus over there.  What are the
ages?"

The mathematician, after some thought, replied that he did not have
enough information to solve the problem.  The logician then said that
his oldest child was learning to play the piano.  The mathematician
then told the logician the ages.

What are the ages?



  ...........................                   Wes Jones
  ..~~ ...~~ .~~~~~ ..~~~~ ..    .--=================================--.
  ..~~ ...~~ .~~ ....~~ .....   / . int470u@lindblat.cc.monash.edu.au . \
  ..~~ ~~ ~~ .~~~~ ...~~~ ...  / ... int470u@aurora.cc.monash.edu.au ... \
  ..~~~~~~~~ .~~ .......~~ ..  \ .... int470u@ccds.cc.monash.edu.au .... /
  ...~~ .~~ ..~~~~~ .~~~~ ...   \ .. apt878tm2@vx24.cc.monash.edu.au .. /
  ...........................    `--=================================--'
Newsgroups: rec.puzzles
From: blum@news.ils.nwu.edu (Daniel Blum)
Subject: Re: Packing problem
Organization: The Institute for the Learning Sciences
X-Newsreader: TIN [version 1.1 PL6]
Date: Fri, 16 Oct 1992 23:17:09 GMT

>In article <67423@cup.portal.com>, ISW@cup.portal.com (Isaac S Wingfield) writes:
>|> In article <1992Oct6.020647.4651@ils.nwu.edu> blum@news.ils.nwu.edu 
>|> (Daniel Blu
>|> m) writes:
>|> >A few years ago, this puzzle appeared in the newsletter of the company
>|> >I was working for:
>|> >
>|> >   Given an infinitely long rectangular strip which is two units wide,
>|> >and circles with diameters of one unit, one can pack them in parallel
>|> >rows of two, like so:
>|> >                      _____________________________
>|> >                      |oooooooooooooooooooooooooooo...
>|> >                      |oooooooooooooooooooooooooooo...
>|> >                      -----------------------------
>|> >However, there is a more efficient packing.  What is it?
>|> 
>|> If the strip is *infinitely long*, as stated, no alternate packing strategy 
>|> is more efficient, in the sense that it would allow more circles to be fit 
>|> into it...
>|> 
>|> Isaac   isw@cup.portal.com

>In fact, one can get a more efficient packing in terms of number of circles
>per unit length (i.e. packing density).

>Without too much analysis, it seems one way to do this is to pack the circles
>in 'egg crate' fashion

>---------------------------------
>|o o o o o o o o o o o o o o o o
>| o o o o o o o o o o o o o o o 
>---------------------------------
>(visualize it more compact, of course)

>In this case, each circle would share a section of tube with two others.
>The only wasted space would be in the beginning bottom section (not at
>the open end since it is infinite).

>Someone else can compute the packing densities to make sure it is greater

The last poster is correct in his definition of packing efficiency,
but the solution given is incorrect.  A solution which I think is
right has been provided - when I get the chance to work out the math I
will post it.


--
_____________________________________________________________________
Dan Blum           Institute for the Learning Sciences   Room 327
blum@ils.nwu.edu   1890 Maple Ave., Evanston, IL 60201   708-467-2306

"By the power vested in me by my own over-inflated ego, I now 
 declare this bridge officially open."
_____________________________________________________________________
From: potamian@apollo.HP.COM (Spyros Potamianos)
Newsgroups: rec.puzzles
Subject: Re: teez brainbuster
Keywords: peg puzzle
Date: 11 Oct 92 22:37:01 GMT
Reply-To: potamian@hpl.hp.com
Organization: Hewlett-Packard Company

In article <11OCT199202085992@wccf.mit.edu>, huh@wccf.mit.edu (GENE SIMON HUH) writes:
|> Dear puzzlers,
|> 
|>      I have a puzzle at my house called "Teez Brainbuster".  It consists of 
|> nine holes in a block of plastic, all lined up.  The initial setup of the 
|> puzzle consists of four blue pegs in holes #1 thru #4 and four red pegs in 
|> holes #6 thru #9, like this:
|> 
|>          B B B B O R R R R
|> 
|> where B = blue peg
|>       R = red peg
|>  and  O = empty hole
|> 
|> The object is to switch the positions of the blue and red pegs, i.e.,
|> 
|>         R R R R O B B B B 
|> 
|> The allowable moves are: 
|>   a) move one blue peg into an adjacent empty hole
|>   b) move one red peg into an adjacent empty hole
|>   c) a peg may "jump" over one (and only one) peg of either color, provided 
|> that the hole that the peg "jumps" into is empty 
|>   d) blue pegs can only be moved to the right; red pegs can only be moved to 
|> the left
|> 
|>      The solution is NOT to turn the plastic block around 180 degrees. :-)
|> 
|>      Normally I'm all right at puzzles, but I can't figure this one out.  I 
|> didn't see it in the FAQ, so here it is.  Has anybody got the solution handy?  
|> If so, are my rules (for allowable moves) incorrect?
|> 
|> Thanks in advance,
|> 
|> Gene Huh
|> huh@wccf.mit.edu  or  huh@mitwccf

A small C program revealed the following 2 answers:
    bRrBBbRRRrBBBBrRRRbBBrRb
    rBbRRrBBBbRRRRbBBBrRRbBr
where r/b means "move a red/blue peg in an adjacent empty hole"
and R/B means "a red/blue peg jumps over another peg to land on the empty
hole". As you can see the solutions are symmetrical, palindromes,
and remain so even if you change the size of the board.
If you have a board with 2*N+1 holes, N red and N blue pegs,
the answer will be:
	b
	Rr
	BBb
	RRRr
	......
	BBBB....B (N times)
	......
	rRRR
	bBB
	rR
	b

I tried to for a more "theoretical" analysis, but I had no luck.
The only interesting things I could find was that this solution
is "greedy" (moving a peg by 2 holes (i.e. jumping) is always better
than a plain move to the adjacent empty hole)
The other interesting thing is that near the middle of these moves you will
end up with the board looking like:
	BRBRBRBRO
(this is where you do these 4 'B's). From that point on all your moves
are forced (if you take into account that you must always "jump" if you
can) and a mirror image of your previous moves.

Spyros Potamianos
potamian@hpl.hp.com
From: 90tms@eng.cam.ac.uk (T.M. Speight)
Newsgroups: rec.puzzles
Subject: Re: Dividing the plane
Date: 12 Oct 92 00:49:59 GMT
Organization: Engineering Department, Cambridge University, England.

In article <1992Oct11.044715.14475@math.toronto.edu> hsieh@math.toronto.edu (Paul Hsieh) writes:


   In article <1b36afINN8so@uwm.edu> radcliff@csd4.csd.uwm.edu (David G Radcliffe) writes:
   >First an easy one:
   >
   >Divide the plane into three disjoint subsets so that every line
   >intersects exactly two of them.

   Colour every point (0,x), x real and non zero, BLUE.  Colour (0,0) GREEN.
   Colour the rest RED.

No! A line parallel to the x-axis would then pass only through the red
region.

90tms@uk.ac.cam.eng      Cambridge University
Toby Speight             Engineering Department
Newsgroups: rec.puzzles