Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

Pandora's Box I.


  • This topic is locked This topic is locked
20 replies to this topic

#1 rookie1ja

rookie1ja

    Senior Member

  • Site Admin
  • PipPipPipPip
  • 1337 posts
  • Gender:Male
  • Location:Slovakia

Posted 30 March 2007 - 04:58 PM

Pandora's Box I. - Back to the Logic Problems
Once upon a time, there was a girl named Pandora, who wanted a bright groom so she made up a few logic problems for the wannabe. This is one of them.
Based upon the inscriptions on the boxes (none or just one of them is true), choose one box where the wedding ring is hidden.

Golden box
The ring is in this box.

Silver box
The ring is not in this box.

Lead box
The ring is not in the golden box.

This old topic is locked since it was answered many times. You can check solution in the Spoiler below.
Pls visit New Puzzles section to see always fresh brain teasers.


Spoiler for Solution

  • 0

rookie1ja (site admin)
Optical Illusions
Support BrainDen

"To start: Press any key... Where's the 'any' key?" - Homer Simpson


#2 pack_fanny

pack_fanny

    Newbie

  • Members
  • Pip
  • 8 posts

Posted 24 April 2007 - 10:07 PM

yay! my brain worked. i got the answer!
  • 0

#3 Joyce

Joyce

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 25 April 2007 - 04:41 AM

too easy
  • 0

#4 tictoon

tictoon

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 27 April 2007 - 05:25 AM

um, shouldnt it be lead box? since either only 1 lie, or all of the boxes lie. so if gold is lying then its in the lead box because silver says : the ring is not in this box. if they were all lying, then the puzzle would be unsolvable because lead would say the ring is in golden box and golden would say its not
  • 0

#5 pack_fanny

pack_fanny

    Newbie

  • Members
  • Pip
  • 8 posts

Posted 04 May 2007 - 07:48 PM

i see your point tictoon. my gut still goes with the silver.
  • 0

#6 fosley

fosley

    Junior Member

  • Members
  • PipPip
  • 33 posts

Posted 08 May 2007 - 03:48 AM

Instead of asking which box is lying, I asked "what if the ring was in X box" for each box, and I made a little truth table:
-----------------------------------------------------------------------
|		 | Gold	   | Silver		 | Lead		  |			 |
|		 | Ring here  | Ring not here  | Ring not gold | Total True  |
|---------+------------+----------------+---------------+-------------|
| Gold	|	 T	  |	   T		|	   F	   |	  2	  |
|---------+------------+----------------+---------------+-------------|
| Silver  |	 F	  |	   F		|	   T	   |	  1	  |
|---------+------------+----------------+---------------+-------------|
| Lead	|	 F	  |	   T		|	   T	   |	  2	  |
|---------+------------+----------------+---------------+-------------|
| None	|	 F	  |	   T		|	   T	   |	  2	  |
|---------------------------------------------------------------------|
The left column is showing which box we're testing. The next column is whether the inscription on the Gold box is true if the ring is in a given box, then Silver and Lead inscriptions. Finally, we have how many inscriptions are true. There is only one possible answer--it can't even be in none of the boxes. Edit: The only answer is that it's in the silver box, because it's the only one with 0 or 1 true inscriptions (the other 3 options have too many true inscriptions).
  • 0

#7 rookie1ja

rookie1ja

    Senior Member

  • Site Admin
  • PipPipPipPip
  • 1337 posts
  • Gender:Male
  • Location:Slovakia

Posted 08 May 2007 - 11:23 AM

There is only one possible answer--it can't even be in none of the boxes.


You might have overlooked the most important condition - none or just one of the inscriptions is true. And your table indicates the same conclusion - ring is in the silver box.
  • 0

rookie1ja (site admin)
Optical Illusions
Support BrainDen

"To start: Press any key... Where's the 'any' key?" - Homer Simpson


#8 fosley

fosley

    Junior Member

  • Members
  • PipPip
  • 33 posts

Posted 08 May 2007 - 10:15 PM

I am in agreement with you. I was just showing tictoon another way to look at it.
  • 0

#9 Spec1alGift

Spec1alGift

    Newbie

  • Members
  • Pip
  • 12 posts

Posted 14 July 2007 - 06:04 PM

W00t i solve it... kinda easy.. isnt it the silver box since both the silver and gold box are lying and the lead box is telling the truth
  • 0

#10 kc teves

kc teves

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 08 August 2007 - 07:48 AM

yeah i think it is in the silver box!!!
  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users