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04-23-2010, 01:12 AM   #16
Mikaiel
Shoot it Boobie !!!

Join Date: Oct 2007
Posts: 4,626
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by EroticVanilla I've never bought that though process, I don't understand why just because C has been eliminated as an option it would have any effect on A or B. It seems that after you have eliminated C the choice between A or B would be an independent event from C. Someone who is good in math could probably explain this, but really from what I can tell it should have no effect.

Let's say you picked box A. At 1st, your chance to get the million dollars is 33.3% (1/3).

That means you have a 66.6% chance of picking the wrong box. Which means there's a 66.6% chance the million dollars is either in box B or C.

Since the host tells you it's not in box C, then there's a 66.6% chance it's in box B, so you should switch.

EDIT : Let's say :

Box A : Nothing
Box B : Nothing
Box C : \$1,000,000

There's only 3 possible scenarios :

- You pick box A : The host has no choice but to eliminate box B. Switch = win

- You pick box B : The host has no choice but to eliminate box A. Switch = win

- You pick box C : The host will either eliminate box A or B. Switch = fail

So if you switch, you win 66.6% of the time.

And just 33.3% if you don't.

Last edited by Mikaiel : 04-23-2010 at 01:18 AM.

04-23-2010, 01:17 AM   #17
Coach A
Coach America

Join Date: Feb 2007
Location: Proud to live in America!!!
Posts: 323
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by iamgine We know you can measure 40 minutes by lighting both ends of the rope. So first you light one rope at two ends and the other rope on one end. Then when the first rope burn out, you'll know 40 minutes has passed and the second rope only has 40 more minutes to burn out. If you immediately light the second rope at the other end, that will measure half of 40 minutes which is 20 minutes. That way 40 minutes + 20 minutes = 60 minutes.

yep

04-23-2010, 01:18 AM   #18
pete's montreux
Blu Ray™ Savant

Join Date: Jan 2007
Posts: 29,190
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by InspiredLebowski A cowboy rides into town on Friday, stays three days, leaving on Friday? HOW!? OMGZ!

Ummmmmmmm, the cowboy was Doc Brown? 1.21 JIGGAWATTS!

04-23-2010, 01:31 AM   #19
EroticVanilla
Sexual Chocolate=GOAT

Join Date: Feb 2009
Posts: 1,620
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by Mikaiel Let's say you picked box A. At 1st, your chance to get the million dollars is 33.3% (1/3). That means you have a 66.6% chance of picking the wrong box. Which means there's a 66.6% chance the million dollars is either in box B or C. Since the host tells you it's not in box C, then there's a 66.6% chance it's in box B, so you should switch.

Edit: Granted in the parameters given in this scenario your right

Last edited by EroticVanilla : 04-23-2010 at 01:34 AM.

04-23-2010, 01:35 AM   #20
InspiredLebowski
Roy Hibbert Super Star

Join Date: Jan 2008
Posts: 26,283
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by pete's montreux Ummmmmmmm, the cowboy was Doc Brown? 1.21 JIGGAWATTS!
I don't know about all that but I just downloaded a Stevie Ray at Austin City Limits, part from 83 and part from 89. Good ****ing shit.

04-23-2010, 01:37 AM   #21
pete's montreux
Blu Ray™ Savant

Join Date: Jan 2007
Posts: 29,190
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by InspiredLebowski I don't know about all that but I just downloaded a Stevie Ray at Austin City Limits, part from 83 and part from 89. Good ****ing shit.

The horse's name is Friday, derrrrrrrrrrrrrrrrr.

Can't go wrong with Stevie Ray, really. Unless you get some of his late 80's shows where he's high and drunk and plays like shit.

04-23-2010, 01:48 AM   #22
plowking
Banned

Join Date: Jan 2007
Posts: 22,769
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by Coach A 8.. A King tests 3 logicians. He has 8 hats. 4 Black and 4 White. He asks the logicians to close their eyes. While that is being done, he hides 2 of the hats behind him, and puts 2 hats on each logician. When the logicians open their eyes, they can only see the hats of the other 2 logicians, but can't see their own hats nor the hats the king hid. The king then starts asking them if they can tell which hate they have on: Logician A: "No Idea" Logician B: "Don't know" Logician C: "Not sure" The King gets mad, and asks around 1 more time Logician A: "I still don't know" Logician B: "I've figured it out" And he gets it correct. What hats was B wearing and why?

I'm guessing Logician B looks around and sees that his two other partners are wearing 2 black hats each, or 2 white hats each, thus he determines that he is wearing 2 of the same color as well.

EDIT: Then Logician B can say which color hat he thinks he's wearing, thus giving the other two the answer as to what they're wearing since they know he'd only speak up if he saw them wearing the same colored hat. So if Logician B says "they are both wearing 2 white hats each", they could determine that the King has 2 black hats behind his back, since they could have a look at Logician B and see he is wearing 2 black hats.

Am I anywhere on the right track?

Last edited by plowking : 04-23-2010 at 01:51 AM.

 04-23-2010, 01:54 AM #23 plowking Banned     Join Date: Jan 2007 Location: now taking over your radio Posts: 22,769 Re: Brain Teasers and Riddles And for 3 I'm gonna guess Amy and Ron.
04-23-2010, 02:01 AM   #24
Coach A
Coach America

Join Date: Feb 2007
Location: Proud to live in America!!!
Posts: 323
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by plowking I'm guessing Logician B looks around and sees that his two other partners are wearing 2 black hats each, or 2 white hats each, thus he determines that he is wearing 2 of the same color as well. EDIT: Then Logician B can say which color hat he thinks he's wearing, thus giving the other two the answer as to what they're wearing since they know he'd only speak up if he saw them wearing the same colored hat. So if Logician B says "they are both wearing 2 white hats each", they could determine that the King has 2 black hats behind his back, since they could have a look at Logician B and see he is wearing 2 black hats. Am I anywhere on the right track?

Well if that was the case, he would know right away the first time he was asked. But he didn't....you are kind of one the right track...

04-23-2010, 02:03 AM   #25
Coach A
Coach America

Join Date: Feb 2007
Location: Proud to live in America!!!
Posts: 323
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by plowking And for 3 I'm gonna guess Amy and Ron.
No

 04-23-2010, 02:04 AM #26 Coach A Coach America     Join Date: Feb 2007 Location: Proud to live in America!!! Posts: 323 Re: Brain Teasers and Riddles 2,3, and 8 remain the only ones un-solved!
 04-23-2010, 02:15 AM #27 Bosnian Sajo (-_-)(X_X)BB(9_9)(^_^)     Join Date: Feb 2010 Location: Formerly Known as "big baller" Posts: 5,087 Re: Brain Teasers and Riddles A women shoots her husband, holds him under water for 5 minutes, and then finally hangs him. Later that evening, they go out an enjoy a lovely dinner. How can this be?
04-23-2010, 02:17 AM   #28
EroticVanilla
Sexual Chocolate=GOAT

Join Date: Feb 2009
Posts: 1,620
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by Bosnian Sajo A women shoots her husband, holds him under water for 5 minutes, and then finally hangs him. Later that evening, they go out an enjoy a lovely dinner. How can this be?
She took a picture of him.

BTW did anyone get shot-up in you school.

04-23-2010, 02:20 AM   #29
IlliniFan
Very good NBA starter

Join Date: Jul 2006
Location: NOVA
Posts: 8,055
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by Bosnian Sajo A women shoots her husband, holds him under water for 5 minutes, and then finally hangs him. Later that evening, they go out an enjoy a lovely dinner. How can this be?
I see what you're trying to do but this little riddle doesn't work.

04-23-2010, 02:20 AM   #30
Bosnian Sajo
(-_-)(X_X)BB(9_9)(^_^)

Join Date: Feb 2010
Location: Formerly Known as "big baller"
Posts: 5,087
Re: Brain Teasers and Riddles

Quote:
 Originally Posted by EroticVanilla She took a picture of him. BTW did anyone get shot-up in you school.

Nope, apparently the kid will come once the police leave the school, although the police are spying on him 24/7 so I doubt anything will happen.

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