Forum: The Classroom
Topic: brain benders
started by: whiskey@throttle

Posted by whiskey@throttle on Sep. 22 2000,15:50
Hey, I'm trying to put together somewhat of a brain teaser anthology. Anyone got any good ones? (riddles, logic puzzles, whatever)
There's some rather intelligent folks on this board - it'll be interesting to see who's got a stumper.

Well, since I brought it up, here's one of mine. I thought it up the other day while doodling, so as far as I know, there may be loopholes or more than one answer. Anyhow, using nothing but straight lines, create a perfect circle.

[This message has been edited by whiskey@throttle (edited September 22, 2000).]


Posted by jim on Sep. 22 2000,15:57
Are asking how to do it???

My guess would be either draw the straight lines right next to each other from left to right until you have a perfect filled in circle.

Or draw them the same length but have the middle of each line all intersect at the same point until you have a complete solid circle....

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by Lordbrandon on Sep. 22 2000,16:43
or pick up one of the lines and punch a hole in the paper, wich of corse whould be.. a perfect circle,
or using only straight lines write out the names of all the original members of tool and then you whould have the band "a perfect circle"

or draw a bunch of straight lines on a peice of paper and sell it on ebay for one penny wich is a perfect circle hmm.. what about the ebay fee?? ok sell it for one penny and 3 mils


Posted by hair on Sep. 22 2000,20:18
its impossible unless the circle is solid.

------------------
code poet


Posted by whiskey@throttle on Sep. 22 2000,22:40
Well, I already know the answer, I was just sharing it. And I guess you guys are right - it may not be perfect , but it's pretty close.

I was just hoping other people had some good brain teasers to share...


Posted by starduck on Sep. 22 2000,23:05
you can't have more than one space in a row, gotta use   ; (with the colon by the nsbp, it shows up as a space! argh!) NO! DAMMIT!
& n b s p ; without the spaces!

[This message has been edited by starduck (edited September 22, 2000).]

[This message has been edited by starduck (edited September 22, 2000).]


Posted by PersonGuy on Sep. 22 2000,23:50
Or you could:
1) Draw a strait line on a sheet of paper.
2) Cut it out.
3) Tape the ends together

---

What's shinnier than the shinniest gem, duller than the dullest smudge, and eaten by dead men?

------------------
<P:\>erson\Guy.exe -PersonGuy *pERSONgUY.cfg
< http://www.personguy.com >


Posted by Happyfish on Sep. 23 2000,02:00
quote:
Originally posted by Tsupa:
hmm... it didn't look like that before i posted it... wonder what went wrong... *sigh*

You gotta use the code tag. [ code] code here [/ code].

code:
  
lotsa spaces


Posted by Happyfish on Sep. 23 2000,02:06
quote:
Originally posted by iso9k:
Well you could always use straight lines to write this out...and you could take it as far as you want...(be as close to a perfect circle that you could get...)

I would like to note that creating a perfect circle is not really possible. You could get close, but.... 3.14 [...etc]


Wait..I'm confused..how does writing out pi give you a perfect circle? Pi is just a ratio.


Posted by Tsupa on Sep. 23 2000,05:30
/\
/ \
---
/ \
/ \

--- --- ---- ---- ---- ---- -----
| | | | / | | | |
--- --- --- |- ---- | |
| | | \ | | | |
| --- | \ | ---- ---- |

---- ---- ---- ---- | ----
| | | / | | |
| | --- | | ----
| | | \ | | |
---- ---- | \ ---- ---- ----

There... i drew A Perfect Cirlce using only straight lines.. now what ?


Posted by iso9k on Sep. 23 2000,05:32
Well you could always use straight lines to write this out...and you could take it as far as you want...(be as close to a perfect circle that you could get...)

I would like to note that creating a perfect circle is not really possible. You could get close, but....


----------------

3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055 596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903 600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799674956735188575272489122793818301194912983367336244065664308602139494639522473 719070217986094370277053921717629317675238467481846766940513200056812714526356082778577134275778960917363717872146844090122495343014654958537105079227968925892354201995611212902196 086403441815981362977477130996051870721134999999837297804995105973173281609631859502445945534690830264252230825334468503526193118817101000313783875288658753320838142061717766914730 35982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989

[This message has been edited by iso9k (edited September 22, 2000).]


Posted by Tsupa on Sep. 23 2000,05:32
hmm... it didn't look like that before i posted it... wonder what went wrong... *sigh*
Posted by NiGHTS_01 on Sep. 23 2000,06:15
If you use an infinite number of straight lines arranged in a 360 degree pattern, you'd have a circle.

------------------
"Is this real, or am I dreaming?"


Posted by SnotFu on Sep. 23 2000,08:54
Like Tsupa above was trying to do, you spell out "A Perfect Circle" using ascii "|"
and "\" and "_".

I have an annoying brain teaser, and if I
remember the other one I know...then I will
post it.

<teaser>
Three men are heading from one island to
another island on a raft. They each have one
cigarette. They are bare naked and have
nothing other than the raft. Along the way,
they never receive anything or anyone, and
the never encounter anything or anyone.
When they get to the island, two of their
cigarettes are lit. How did they do this?
</teaser>

P.S. Would it hurt to have some sort of word
wrap on these forums?

This message has been edited by SnotFu on September 23, 2000 at 03:58 AM


Posted by PersonGuy on Sep. 23 2000,12:59
Is that a trick question... like they got off the raft, got some matches at a town and lit their ciggars... therefore having 2 lite when they get to the island.

------------------
<P:\>erson\Guy.exe -PersonGuy *pERSONgUY.cfg
< http://www.personguy.com >


Posted by jim on Sep. 23 2000,13:21
One of the cigarettes could have already been lit. Then one the other guys lit his cigarette off of the first guy

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by SnotFu on Sep. 23 2000,19:11
The cigarettes were not lit before they
left. Before they got to the second island,
their cigarettes were lit somehow. They did
not stop at some other area and light the
cigs then head off to the second island.

Tip: Don't use common sense to answer this.
Common sense is no longer mandatory in our
society.

This teaser is only funny the longer someone thinks of how to solve it.


Posted by whiskey@throttle on Sep. 23 2000,23:47
Here's the answer to my circle riddle. This may be sound confusing, so I'll post a pic if I have to.


  1. Draw a square, lets say 8" X 8"
  2. Draw a perpendicular line at the 4" (midway) mark of each side. Now you should have for L shaped pieces identified.
  3. Label an equal number of perpendicular lines as if you were designing a Cartesian coordinate grid. Each L will have it's own X and Y axis. Lets say each one is 1/2" from the 0 point. In other words, it will be like having 4 seperate X and Y axes.
  4. Let's assume you made the each of the 4 X and Y grids go up to 8. Connect the following lines in each L shaped quadrant: (1,8), (2,7), (3,6), (4,5) etc. This should create an arc in each L.
  5. After you do this 4 times, you will have made a rather perfect circle.


Posted by Michael on Sep. 24 2000,00:47
Here's a good one:

The one who made it didn't want it.
The one who bought it didn't need it.
The one who used it didn't know it.


Posted by kuru on Sep. 24 2000,14:39
boze, the more points you use, and the closer together they are, the more perfect the circle becomes. do a couple hundred of those lines, and eventually you're left with a perfect circle.

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by jim on Sep. 24 2000,14:43
quote:
Originally posted by Michael:
Here's a good one:

The one who made it didn't want it.
The one who bought it didn't need it.
The one who used it didn't know it.


COFFIN???

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by Bozeman on Sep. 24 2000,17:02
That circle won't be perfect! (Am I a nitpicker, or what?)
Posted by TonyDennis on Sep. 24 2000,17:18
I think this is what he was going for:
code:

/\
/ \
---
/ \
/ \


--- --- ---- ---- ---- ---- -----
| | | | / | | | |
--- --- --- |- ---- | |
| | | \ | | | |
| --- | \ | ---- ---- |

---- ---- ---- ---- | ----
| | | / | | |
| | --- | | ----
| | | \ | | |
---- ---- | \ ---- ---- ----



Weee :)

-Tony

------------------
< w00t >.


Posted by peregrin on Sep. 27 2000,10:45
if you were a hot dog and you were starving, would you eat yourself?

p.s. i know i'm an idiot.

This message has been edited by peregrin on September 27, 2000 at 05:46 AM


Posted by Wolfguard on Sep. 27 2000,11:40
Your at your camp. You get up grab your compass and walk 3 miles due south, 3 miles due west and then 3 miles due north and end up right back in your camp.

Where in the world are you?

------------------
Nuke em' till they glow and shoot em’ in the dark and let the computer sort em' out.
Then wait for a mutation…


Posted by jim on Sep. 27 2000,11:56
quote:
Originally posted by Wolfguard:
Your at your camp. You get up grab your compass and walk 3 miles due south, 3 miles due west and then 3 miles due north and end up right back in your camp.

Where in the world are you?


North Pole

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by Wolfguard on Sep. 27 2000,12:54
quote:
Originally posted by jim:
North Pole


Big red X and a buzz for you.

But your on the right track. The questions states "grab your compass"

------------------
Nuke em' till they glow and shoot em’ in the dark and let the computer sort em' out.
Then wait for a mutation…


Posted by Observer on Sep. 27 2000,13:35
Then that would have to be the magnetic north pole, right?

------------------
A good programmer is someone who looks both ways on a one-way street


Posted by whiskey@throttle on Sep. 27 2000,15:07
I guess the camp could be 3 miles wide also...

BTW, what was the answer to the cigarette one?


Posted by kuru on Sep. 27 2000,16:12
the only way that would work is if you turned in 60°angles... because otherwise, you've got 3 legs of a square and don't end up at the same point you started at.

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by jim on Sep. 27 2000,16:41
quote:
Originally posted by kuru:
the only way that would work is if you turned in 60°angles... because otherwise, you've got 3 legs of a square and don't end up at the same point you started at.

That would be true if the earth was flat.

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by kuru on Sep. 27 2000,16:48
it still works, because at a surface distance of 3 miles in any direction, the curvature of the earth is not that large. also, you're talking about traveling along the surface of the earth, which unless you're going a huge distance, cartesian coordinates do work. the angles i'm talking about are surface angles in the plane of the ground, and besides, even if you were to account for curvature, 3 turns of 90° don't get you back to your starting point. try it with a globe or something. go a set distance, turn 90°, travel the same distance, turn 90°, travel the same distance and see if you're back where you started.

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by jim on Sep. 27 2000,16:54
3 90° turns, yes... You end up with "3 legs of a square", but this isn't the case in this situation unless you are saying the difference between Due South and Due West is Always 90°.

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by Blain on Sep. 27 2000,18:30
I would have to agree with Observer:

If you walk 3 miles straight south from the magnetic north pole, then 3 miles west, your compass is going to put north right back at the magnetic north pole; where you came from. However the distance doesn’t quite work, Pythagorean theorem and all that shit

------------------
Presented in double vision when drunk.


Posted by Keeps on Sep. 27 2000,20:48
On a sphere, you can make a triangle with three 90 degree angles. And while three miles to the side isn't the simplest example of this, it still works. What everyone's forgotten is that when you're that close to magnetic north, due west isn't a straight line, but an arc of a circle with north at the center. After turning west, to stay going west, you would have to be continuously turning a little to the right.
Posted by aventari on Sep. 27 2000,21:13
naw you dont understand, it _does_ work. becuase the turns you make when you go due west from going due south AREN'T 90 degrees, they're 120 degrees. Look at jim's map if you dont belive me. if you go 3 miles, turn 120 degrees right, go 3 more miles. turn 120 degrees right again and go 3 more miles, you're back where you started.

It's an equilateral triangle with sides of 3 miles.

Although I like the 3 mile wide camp idea a lot! hehehe

------------------
aventari
"A witty saying proves nothing." --Voltaire


Posted by SnotFu on Sep. 28 2000,00:09
Well - sorry to change the subject - the answer to the raft riddle:

They threw ONE cigarette over the side, and now the RAFT IS A CIGARETTE LIGHTER.

(I didn't make this one up. Sorry.)


Posted by whiskey@throttle on Sep. 28 2000,02:40
I think I'm going to barf.


Posted by reman on Sep. 28 2000,02:50
There is a cabin in the middle of a clearing in the middle of the forest, all around it are strewn the bodies of dead people. How did they die?

regards, reman


Posted by j0eSmith on Sep. 28 2000,03:04
Oh dude, common, make em a LITTLE harder

it was an Airplane cabin, and they all died in the plane crash.

heres one:

A man is found dead in a forest clearing, wearing nothing but shorts. There is a small rubber tube next to him. How did he die, and what happened?

------------------
When my flying days are over, and my death has come to pass
I hope they bury me upside down, so the whole damn world can kiss my ass


Posted by whiskey@throttle on Sep. 28 2000,03:55
hmmm...

he stuck one end of the tube in his nose and the other in his mouth and asphyxiated himself with his own CO2.

I don't know.


Posted by Observer on Sep. 28 2000,04:07
If memory serves, he was dropped there by a hurricane or something like that. Wearing shorts and having the rubber tube because he was at the beach. Close enough for ya?

------------------
A good programmer is someone who looks both ways on a one-way street


Posted by j0eSmith on Sep. 28 2000,04:19
Alright, I'll give it to you. Although my version is like this:

The man was snorkeling (the rubber tube) in a large lake when a waterbomber came and skimmed the lake, picking up water and the poor snorkeler. He then flew out over a forest fire and dropped the water and the now drowned man.


Posted by Observer on Sep. 28 2000,05:00
It is if you look at a compass. Due South is 180 degrees, due West is at 270 degrees. Plus, if you start standing at the magnetic North Pole, a step in any direction is due South.

------------------
A good programmer is someone who looks both ways on a one-way street


Posted by jim on Sep. 28 2000,05:14
Well I'm not going to spend all day looking
for an illistration, but notice in this
picture that our latitude lines
(north/south) and longitude (east/west) do
not meet perpendicularly...
(is that a word) They don't meet at 90
degrees....
Except along the equator.

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >

This message has been edited by jim on September 27, 2000 at 12:35 PM


Posted by Wolfguard on Sep. 28 2000,11:17
quote:
Originally posted by Observer:
Then that would have to be the magnetic north pole, right?


A man that knows his stuff. You can go to that location to collect your prize.

------------------
Nuke em' till they glow and shoot em’ in the dark and let the computer sort em' out.
Then wait for a mutation…


Posted by incubus on Sep. 28 2000,14:24
OK, my 2 cents ...

A man walks into a bar.

He walks straight up to the barman and says "Can I have a glass of water please?"

The barman pulls out a desert eagle from under the bar and points it in his face.

The man says "Thankyou very much", turns round and walks out of the bar smiling.

Why?

------------------
-- incubus
As I chase the leaves like the words I never find ...


Posted by Observer on Sep. 28 2000,14:42
The man had the hiccups.

------------------
A good programmer is someone who looks both ways on a one-way street


Posted by kuru on Sep. 28 2000,15:14
how far can a cat run into the woods?

what can go up a chimney down but not down a chimney up?

two fathers and two sons go fishing, each catches a fish, none goes home empty handed, and only three fish are caught. how can this be?

as i was going to st. ives, i met a man with seven wives. each wife had seven sacks. each sack had seven cats. each cat had seven rats. how many were going to st. ives?

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by Bozeman on Sep. 28 2000,15:15
Halfway.

Umbrella.

One.


Posted by kuru on Sep. 28 2000,15:19
right right and right, how bout the third riddle?

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by pengu1nn on Sep. 28 2000,15:23
two fathers, two sons

a grandfather, a father, and a son

the gandfather is a father (1)
the father is a father (2) and a son (1)
the son is a son (2)


Posted by jim on Sep. 28 2000,18:05
quote:
Originally posted by PersonGuy:
What's shinnier than the shinniest gem, duller than the dullest smudge, and eaten by dead men?

LOL! I didn't even see that one.

Answer: Nothing

The riddle should read:
What is it that is bigger than the universe, is eaten by dead men, but if eaten by the living, will kill them?

There could possible be 'something' shinnier than a gem, or 'duller' than even the DULLEST smudge.

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by whiskey@throttle on Sep. 29 2000,03:27
Here's one for ya:

You are locked in a dungeon. However, there are two doors by which you can escape. One leads to safety. The other leads to certain death. (and no, you can't take a peek down either one) Sitting in the dungeon with you are two parrots. One parrot, who always tells the truth, wants you to be safe. The other parrot is a bastard and a total liar, and really wants to see you die. You don't know which door leads to safety, or which parrot tells the truth. To top it all off, you can only ask one parrot one question. Assuming the parrots know which door leads to safety, what is the one question you should ask?


Posted by j0eSmith on Sep. 29 2000,03:38
Ask the Parrots which way do you want me to go?

the truthful one will tell you the safe way because it wants you to go there. The lieing parrot will lie and say the safe one as well because all it can do is lie, even though it want's you to do the other way

actully I originally heard this one with a fork in the road leading to different tribes, and the answer was "Which way to your tribe?" but I digress..

------------------
When my flying days are over, and my death has come to pass
I hope they bury me upside down, so the whole damn world can kiss my ass

This message has been edited by j0eSmith on September 28, 2000 at 10:44 PM


Posted by The_Hiro on Sep. 29 2000,03:46
quote:
Originally posted by whiskey@throttle:
Assuming the parrots know which door leads to safety, what is the one question you should ask?

A. Which door would the other parrot tell me to go through?


Posted by jim on Sep. 29 2000,05:27
Damnit! That's what I get for going to lunch. I knew all those...

Here's an oldie.

A man leaves home. Makes 3 left turns and returns home. He is met by 2 men wearing masks.

Who are these men?

------------------
jim
Beauty is in the eye of the Beer Holder
< Brews and Cues >


Posted by PersonGuy on Sep. 29 2000,05:54
the catcher and umpire at a baseball game.

Am I the only one who has an unsloved riddle?????!?!?!?! It's like the 10th post in the thread!!

What's shinnier than the shinniest gem, duller than the dullest smudge, and eaten by dead men?

------------------
P:\erson\Guy.exe -PersonGuy *pERSONgUY.cfg
< http://www.personguy.com >

This message has been edited by PersonGuy on September 28, 2000 at 12:55 PM


Posted by whiskey@throttle on Sep. 29 2000,15:14
Okay, apparently that one was too easy. Try these:

  1. What is special about 304250263527210?

  2. What singular English word becomes plural when you add the letter 's', yet becomes singular again when you add another 's'?

  3. Which is greater, the number of grooves on one side of a vinyl record, or the number of days in a year?


Posted by kuru on Sep. 29 2000,15:55
3: the number of days in a year. there's only one groove in each side of a vinyl record.

------------------
kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa


Posted by askheaves on Sep. 29 2000,16:27
quote:
Originally posted by whiskey@throttle:
What singular English word becomes plural when you add the letter 's', yet becomes singular again when you add another 's'?

'Ho'

Ho + s = Hos (as in: I gots to get money from my hos.)

Hos + s = Hoss (as in: That fat bitch is a three-fiddy hoss!)

Don't kill the messenger... he's only answering a riddle.


Posted by Blain on Sep. 29 2000,16:59
What is the only word in the English language that ends in the letters “mt”

------------------
Presented in double vision when drunk.


Posted by The_Hiro on Sep. 30 2000,02:47
quote:
Originally posted by Blain:
What is the only word in the English language that ends in the letters “mt”

There's more than one. There's dreamt (probably the one you're thinking of), undreamt, daydreamt, redreamt, and adreamt.

This message has been edited by The_Hiro on September 29, 2000 at 11:23 PM


Posted by The_Hiro on Sep. 30 2000,03:53
quote:
Originally posted by whiskey@throttle:
Okay, apparently that one was too easy.
What is special about 304250263527210?

It's 41# (Or the product of the first thirteen consecutive primes, if you prefer).


Posted by The_Hiro on Sep. 30 2000,04:21
quote:
Originally posted by whiskey@throttle:
What singular English word becomes plural when you add the letter 's', yet becomes singular again when you add another 's'?

A. There are a bunch: prince, multimillionaire, adventure, bra, cosine, deadline, ogre, squire, etc.


Posted by whiskey@throttle on Oct. 01 2000,16:58
damn, hiro's on the ball...
Posted by fatbitch on Oct. 08 2000,13:41
I don't think this is actually solvable, but i'll put it here anyway

The 3rd word ending in 'gry'. the first 2 being hungry and angry. what is the third?

i saw on a site some stupid scientific words like agry and ogry and such but i mean common english words. is there a third?!


Posted by aventari on Oct. 08 2000,18:04
whats the word ending in 'mt'? I cant figure that one out!

------------------
aventari
"Where's the TV?" "TV is the devil's Tool." "Yeah. Where is it?" -- Beavis and Butt-head


Posted by Observer on Oct. 09 2000,03:08
quote:
Originally posted by fatbitch:
...The 3rd word ending in 'gry'

Could have sworn I posted this one already! Anyway, the answer is simply 'gry'. It is a word. Here's the reference: < http://www.dictionary.com/cgi-bin/dict.pl?term=gry >

------------------
A good programmer is someone who looks both ways on a one-way street


Posted by fatbitch on Oct. 09 2000,10:15
hmm... there is supposedly a common word... but i would have thought of it by now. oh well
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