User Name
Password

Go Back   Planetarion Forums > Non Planetarion Discussions > General Discussions

Reply
Thread Tools Display Modes
Unread 17 Feb 2007, 14:45   #1
KoeN
Lucky
Helicopter Champion
 
Join Date: Jul 2003
Location: -
Posts: 3,818
KoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant future
a (simple, but fun) riddle

- you have 51 coins, 11 of them being 'heads up'.
- you now have to make 2 groups; both of them having the same amount of coins that have heads up.
- you are blindfolded, can't ask for help and can't sense in whatever way which coins are head up or not.
- you are only allowed to flip the coins whenever you want.

how do you do this?


goodluck team.





*hint 1: there is a proper solution for this, no lame answers etc.
*hint 2: the number of coins for this riddle is irrelevant.
KoeN is offline   Reply With Quote
Unread 17 Feb 2007, 14:51   #2
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,483
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Have two groups with all the coins on their sides. Admittedly, that's a cheating answer, and may or may not be disallowed by the rules depending on your interpretation.
MrL_JaKiri is offline   Reply With Quote
Unread 17 Feb 2007, 15:04   #3
Boogster
I dunno...
 
Boogster's Avatar
 
Join Date: Jun 2003
Location: manchester
Posts: 1,502
Boogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud ofBoogster has much to be proud of
Re: a (simple, but fun) riddle

Get rid of 49 coins and hope for the best with the final two?

Best I can do in two minutes I'm afraid.
__________________
He shall drink naught but brine, for I'll not show him / Where the quick freshes are.
Boogster is offline   Reply With Quote
Unread 17 Feb 2007, 15:08   #4
KoeN
Lucky
Helicopter Champion
 
Join Date: Jul 2003
Location: -
Posts: 3,818
KoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant future
Re: a (simple, but fun) riddle

i'd expect you to do better than that jakiri.
KoeN is offline   Reply With Quote
Unread 17 Feb 2007, 15:17   #5
Apothos
Not Dark or Handsome
Treasure Diver Champion, Alien Commander Champion, Magic Ball Champion
 
Apothos's Avatar
 
Join Date: Nov 2001
Location: Cwmbru
Posts: 2,587
Apothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so littleApothos contributes so much and asks for so little
Re: a (simple, but fun) riddle

You turn over all the coins just once, and split the group randomly into two?
__________________
"You can't drink a pint of Bovril."
Apothos is offline   Reply With Quote
Unread 17 Feb 2007, 15:17   #6
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

I'm not sure how exactly it works but I'm hoping the solution involves beheading a daft dutchman who posts stupid uninteresting riddles on internet forums.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 17 Feb 2007, 15:26   #7
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

make two groups of one coin, balanced on their edge. Neither have a coin which is heads up therefore both have the same number
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 15:31   #8
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

Alternately, take 11 coins and flip them. This makes pile one, and the rest make pile 2.

If a coin you pick up was heads and you flip it, then it is tails in pile 1 and pile 2 has one less heads.
If a coin you pick up was tails and you flip it, then it is heads in pile 1 and equals one of the other heads which are in pile 2
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 15:44   #9
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

worked example :

51 coins, 11 are heads = 40 tails

Take one coin, its heads. Flipped and is placed into pile 1.
1) T , 2) 10H,40T
Take one coin, its tails. Flipped and is placed into pile 1.
1) T,H , 2) 10H,39T
Take one coin, its tails. Flipped and is placed into pile 1.
1) T,2H , 2) 10H,38T
Take one coin, its heads. Flipped and is placed into pile 1.
1) 2T,2H, 2) 9H,38T.
Take one coin, its heads. Flipped and is placed into pile 1.
1) 3T,2H, 2) 8H,38T.
Take one coin, its heads. Flipped and is placed into pile 1.
1) 4T,2H, 2) 7H,38T.
Take one coin, its tails. Flipped and is placed into pile 1.
1) 4T,3H, 2) 7H, 37T.
Take one coin, its tails. Flipped and is placed into pile 1.
1) 4T,4H, 2) 7H, 36T.
Take one coin, its tails. Flipped and is placed into pile 1.
1) 4T,5H, 2) 7H, 35T.
Take one coin, its tails. Flipped and is placed into pile 1.
1) 4T,6H, 2) 7H, 34T
Take one coin, its heads. Flipped and is placed into pile 1.
1) 5T,6H, 2) 6H, 34T.

Both piles have 6 heads in them, fitting the requirements.
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 15:47   #10
KoeN
Lucky
Helicopter Champion
 
Join Date: Jul 2003
Location: -
Posts: 3,818
KoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant future
Re: a (simple, but fun) riddle

it's much simpler phil.
KoeN is offline   Reply With Quote
Unread 17 Feb 2007, 15:49   #11
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

Elaborate then. My method works and i have shown as much. ( and if you go " oh both piles one and two are empty" as a cheat answer then may bodily harm be inflicted upon you )

btw was this an assignment of yours to do which has now been completed?
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 16:04   #12
Dante Hicks
Clerk
 
Join Date: Jun 2001
Posts: 13,941
Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Dante Hicks has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Quote:
Originally Posted by KoeN
it's much simpler phil.
I think he's right, although it probably doesn't matter how you make the initial division.
Dante Hicks is offline   Reply With Quote
Unread 17 Feb 2007, 16:16   #13
KoeN
Lucky
Helicopter Champion
 
Join Date: Jul 2003
Location: -
Posts: 3,818
KoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant futureKoeN has a brilliant future
Re: a (simple, but fun) riddle

OK:

if you have 11 coins that are head up, then pick 11 random coins from the big pile of 51.

for example: let's say 2 out of 11 are head up. this means 9 head up coins are still left on the big pile.

turn around all coins of the 11 you picked, and you automatically have 2 groups of 9 coins on both piles.


easy eh?


edit: well done phil!

Last edited by KoeN; 17 Feb 2007 at 16:21.
KoeN is offline   Reply With Quote
Unread 17 Feb 2007, 16:17   #14
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Words fail me.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 17 Feb 2007, 16:20   #15
Structural Integrity
Rawr rawr
 
Structural Integrity's Avatar
 
Join Date: Dec 2000
Location: Upside down
Posts: 5,301
Structural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriend
Re: a (simple, but fun) riddle

The title said it was a fun riddle...
I want my money back!
__________________
"Yay"
Structural Integrity is offline   Reply With Quote
Unread 17 Feb 2007, 16:26   #16
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

Heres one for you koen ( and others ) . You take a standard chessboard (8x8 = 64 squares) and remove two squares, one at the top left and the other at the bottom right. essentially the diagonal ones are taken off.
Can the remaining squares be covered by 31 dominos where each domino takes up two squares?
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 16:27   #17
Structural Integrity
Rawr rawr
 
Structural Integrity's Avatar
 
Join Date: Dec 2000
Location: Upside down
Posts: 5,301
Structural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriend
Re: a (simple, but fun) riddle

Quote:
Originally Posted by Phil^
Can the remaining squares be covered by 31 dominos where each domino takes up two squares?
Yes
__________________
"Yay"
Structural Integrity is offline   Reply With Quote
Unread 17 Feb 2007, 16:29   #18
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,483
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Quote:
Originally Posted by Phil^
Heres one for you koen ( and others ) . You take a standard chessboard (8x8 = 64 squares) and remove two squares, one at the top left and the other at the bottom right. essentially the diagonal ones are taken off.
Can the remaining squares be covered by 31 dominos where each domino takes up two squares?
No. You've removed two squares of the same colour, whereas a domino must cover a black one and a white one.
MrL_JaKiri is offline   Reply With Quote
Unread 17 Feb 2007, 16:29   #19
milo
Registered User
 
Join Date: Feb 2006
Posts: 1,094
milo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like him
Re: a (simple, but fun) riddle

Quote:
Originally Posted by JonnyBGood
Words fail me.
Hes dutch



I get the principle ie take 11 random coins into one pile and 40 random coins in another. If by chance you picked completely correctly theres 11 heads in one pile and no heads in the other, by flipping the pile with 11 heads both piles have no heads. But lets say you get 1 head in the '40 pile' and 1 tail in the '11 pile' by flipping the 11 pile you've now got one head and the others are tails.


I 'get' the solution but what would a generalised formula for the riddle be*?? the flipping over bit is confusing me, if you have N coins

N=n(T)+n(H)

Pile 1 = N-n(H)
Pile 2 = N-n(T)

Flipping over pile 2 would be 'what' in maths terms?

Nod?



*its more interesting



edit:


I think we're going to need matrices

N [Matrix] = [Scalar matrix ie numbers].[Unit matrix for 'state'] + [Scalar matrix].[Unit matrix]^-1


edit edit: it can't be a unit matrix as the reciprocal would be identical, lets call it a state matrix instead
__________________
boobs

Last edited by milo; 17 Feb 2007 at 17:19.
milo is offline   Reply With Quote
Unread 17 Feb 2007, 16:31   #20
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

Quote:
Originally Posted by MrL_JaKiri
No. You've removed two squares of the same colour, whereas a domino must cover a black one and a white one.
winner
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 16:31   #21
Structural Integrity
Rawr rawr
 
Structural Integrity's Avatar
 
Join Date: Dec 2000
Location: Upside down
Posts: 5,301
Structural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriendStructural Integrity needs a job and a girlfriend
Re: a (simple, but fun) riddle

God, I hate riddles.
__________________
"Yay"
Structural Integrity is offline   Reply With Quote
Unread 17 Feb 2007, 19:55   #22
jt25man
Victim of Marriage
 
jt25man's Avatar
 
Join Date: Oct 2005
Location: NW Indiana
Posts: 784
jt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud of
Re: a (simple, but fun) riddle

You are given 5 bags. There are 10 beads in each of the bags. In four of the bags, the beads each weigh 10 kilograms. In the remaining bag, each bead weighs only 9 kilograms. All the bags and beads look identical. You must find out which bag has the lighter beads. The problem is that all the bags look identical and all the beads look identical. You can use a scale, but it has to be a single-tray scale, not a two-tray balance scale. Also, you may use the scale only once. How can you find out which bag has the lighter beads?
__________________
You mean there's life outside the internet...oh man I'm screwed.
jt25man is offline   Reply With Quote
Unread 17 Feb 2007, 20:20   #23
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

all the methods i can think of require at least two measurements unless you are allowed to move the beads between bags, in which case you can move one bag into another, ending up with two bags. Weighing one bag, if its weight is 200kg then its in the other bag. Otherwise its that one
ALso theres the put them all into one bag method of doing it.
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 20:24   #24
jt25man
Victim of Marriage
 
jt25man's Avatar
 
Join Date: Oct 2005
Location: NW Indiana
Posts: 784
jt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud of
Re: a (simple, but fun) riddle

You can't mix the bags.
You are allowed to take the beads out of the bags.
__________________
You mean there's life outside the internet...oh man I'm screwed.
jt25man is offline   Reply With Quote
Unread 17 Feb 2007, 20:31   #25
JonnyBGood
Banned
 
JonnyBGood's Avatar
 
Join Date: May 2001
Location: Further to the right
Posts: 19,441
JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.JonnyBGood has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

I have a gun with one bullet in it and both koen and alessio are trying to talk to me about how great holland is, how do I kill them both?







Note this isn't so much a riddle as advanced planning.
__________________
Some might ask what good is life without purpose but I'm anticipating a good lunch.
JonnyBGood is offline   Reply With Quote
Unread 17 Feb 2007, 20:34   #26
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

hm. then its got to involve taking advantage of the fact that every bead in the 'lighter' bag is lighter and devising a joint measurement which somehow illuminates this while not allowing you to get confused with the others.
Not sure precisely yet but i'll work on it in a bit.
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 17 Feb 2007, 20:35   #27
All Systems Go
Registered User
 
Join Date: Jan 2005
Location: London
Posts: 3,348
All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.All Systems Go has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Quote:
Originally Posted by JonnyBGood
I have a gun with one bullet in it and both koen and alessio are trying to talk to me about how great holland is, how do I kill them both?







Note this isn't so much a riddle as advanced planning.
Don't take the risk, shoot yourself.
__________________
The 20th century has been characterised by three developments of great political importance. The growth of democracy; the growth of corporate power; and the growth of corporate propaganda as a means of protecting corporate power against democracy.
All Systems Go is offline   Reply With Quote
Unread 17 Feb 2007, 20:40   #28
Nodrog
Registered User
 
Join Date: Jun 2000
Posts: 8,477
Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Nodrog has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Quote:
Originally Posted by milo
Hes dutch



I get the principle ie take 11 random coins into one pile and 40 random coins in another. If by chance you picked completely correctly theres 11 heads in one pile and no heads in the other, by flipping the pile with 11 heads both piles have no heads. But lets say you get 1 head in the '40 pile' and 1 tail in the '11 pile' by flipping the 11 pile you've now got one head and the others are tails.


I 'get' the solution but what would a generalised formula for the riddle be*?? the flipping over bit is confusing me, if you have N coins

N=n(T)+n(H)

Pile 1 = N-n(H)
Pile 2 = N-n(T)

Flipping over pile 2 would be 'what' in maths terms?

Nod?
I'm not sure what youre asking.

If you just want a proof, then assume you have N coins of which H are heads. Split the coins into 2 piles by selecting H random coins (call this pile 1), and call the coins left over pile 2.

Let H1 be the number of heads in pile 1, and H2 be the number of heads in pile 2. Since H = H1 + H2, the number of heads left in pile 2 is H2 = H - H1. So we need to show there are H - H1 coins in pile 1.

pile 1 contains H coins, of which H1 are heads (by definition). Affter you flip them all over, you obviously have H - H1 heads. So both piles now have an equal number of heads.
Nodrog is offline   Reply With Quote
Unread 17 Feb 2007, 21:29   #29
MrL_JaKiri
The Twilight of the Gods
 
MrL_JaKiri's Avatar
 
Join Date: Jan 2001
Posts: 23,483
MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.MrL_JaKiri has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

Quote:
Originally Posted by jt25man
You can't mix the bags.
You are allowed to take the beads out of the bags.
n beads from the nth bag. The rest is really obvious.
MrL_JaKiri is offline   Reply With Quote
Unread 17 Feb 2007, 21:46   #30
Phil^
Insomniac
 
Phil^'s Avatar
 
Join Date: May 2003
Posts: 3,584
Phil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus wouldPhil^ spreads love and joy to the forum in the same way Jesus would
Re: a (simple, but fun) riddle

jakiris right, one bean from first bag, two beans from second, three from third and so on, the final weight of those beans tells you which bag has the lighter ones.
ie the final weight SHOULD be 150 if all had 10kg weights in it, but since one doesnt then theres gonna be an offset
if the offset is 1, ie 149 then it was the first bag. If the offset is 2 ie 148kg then it was the second bag, and so on
__________________
Phil^
Phil^ is offline   Reply With Quote
Unread 18 Feb 2007, 01:27   #31
jt25man
Victim of Marriage
 
jt25man's Avatar
 
Join Date: Oct 2005
Location: NW Indiana
Posts: 784
jt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud ofjt25man has much to be proud of
Re: a (simple, but fun) riddle

Quote:
Originally Posted by JonnyBGood
I have a gun with one bullet in it and both koen and alessio are trying to talk to me about how great holland is, how do I kill them both?
You shoot one in the head, and just beat to death the other with the handle.

Quote:
Originally Posted by MrL_JaKiri
n beads from the nth bag. The rest is really obvious.
Quote:
Originally Posted by Phil^
jakiris right, one bean from first bag, two beans from second, three from third and so on, the final weight of those beans tells you which bag has the lighter ones.
ie the final weight SHOULD be 150 if all had 10kg weights in it, but since one doesnt then theres gonna be an offset
if the offset is 1, ie 149 then it was the first bag. If the offset is 2 ie 148kg then it was the second bag, and so on
That is correct.
__________________
You mean there's life outside the internet...oh man I'm screwed.
jt25man is offline   Reply With Quote
Unread 18 Feb 2007, 02:07   #32
milo
Registered User
 
Join Date: Feb 2006
Posts: 1,094
milo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like himmilo is an inspiration to us all and we should try to be more like him
Re: a (simple, but fun) riddle

Quote:
Originally Posted by Nodrog
I'm not sure what youre asking.

Neither am i basically i wanted a 'maths statement that encompassed the process' somewhere beyond a proof.
__________________
boobs
milo is offline   Reply With Quote
Unread 19 Feb 2007, 18:47   #33
Tomkat
:alpha:
 
Tomkat's Avatar
 
Join Date: May 2002
Location: London, UK
Posts: 7,871
Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.Tomkat has ascended to a higher existance and no longer needs rep points to prove the size of his e-penis.
Re: a (simple, but fun) riddle

no it won't take off!!!
__________________
"There is no I in team, but there are two in anal fisting"
Tomkat is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Forum Jump


All times are GMT +1. The time now is 09:31.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2002 - 2018