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On September 19 2006 15:14 Rekrul wrote:Show nested quote +On September 19 2006 12:57 LTT wrote:#2 + Show Spoiler +We want a set of questions where there are three unique answers that are independant of the watches settings.
Consider the questions: Is the Car Behind door 1 or 2? and Is the Car Behind door 2 or 3?
C = car, G = goat. Doors are presented in order from 1 to 3
Case:
CGG Yes, No
GCG Yes, Yes
GGC No, Yes
Now, for our questions to ask the watch, use the following:
Is the answer to the question "Is the car behind door 1 or 2?" blue?
Is the answer to the question "Is the car behind door 2 or 3?" blue?
Blue = Yes, Yellow = No
cgg Blue, Yellow
gcg Blue, Blue
ggc Yellow, Blue
Blue = No, Yellow = Yes
cgg Blue, Yellow
gcg Yellow, Yellow
ggc Yellow, Blue
We get the same results irregardless of the truth values of the watch. If Blue, Yellow pick door 1, If the answers are the same pick door 2, If Yellow, Blue pick door 3. No. This still leaves you with a 50/50 cause you won't know if it's door one or three considering the fact that you don't know which light means no or yes.
This answer is wrong. You don't know which color means yes. The only way to determine which door it is according to your answer is if the car is in the middle door and you get the same light twice.
"""We get the same results irregardless of the truth values of the watch. If Blue, Yellow pick door 1, If the answers are the same pick door 2, If Yellow, Blue pick door 3."""
Since when did Blue and Yellow mean yes and no.. Lol, Switch the values of blue and yellow and your answers are all wrong. The Blue Blue or Yellow Yellow works tho. It would be in the middle.
Edit: If it tells you if the answer is blue, and it says blue it might mean no. If it tells you blue for the 2nd it might mean yes leaving door 3 open, so I'm actually wrong above.. I'm just thinking and thinking and its not making sense PLZ someone explain the answer to me if im wrong or someone at least agree with me haha im really tired.
has anyone heard this b4? this riddle?
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On September 19 2006 18:05 JoopeyDoop wrote:Show nested quote +On September 19 2006 15:14 Rekrul wrote:On September 19 2006 12:57 LTT wrote:#2 + Show Spoiler +We want a set of questions where there are three unique answers that are independant of the watches settings.
Consider the questions: Is the Car Behind door 1 or 2? and Is the Car Behind door 2 or 3?
C = car, G = goat. Doors are presented in order from 1 to 3
Case:
CGG Yes, No
GCG Yes, Yes
GGC No, Yes
Now, for our questions to ask the watch, use the following:
Is the answer to the question "Is the car behind door 1 or 2?" blue?
Is the answer to the question "Is the car behind door 2 or 3?" blue?
Blue = Yes, Yellow = No
cgg Blue, Yellow
gcg Blue, Blue
ggc Yellow, Blue
Blue = No, Yellow = Yes
cgg Blue, Yellow
gcg Yellow, Yellow
ggc Yellow, Blue
We get the same results irregardless of the truth values of the watch. If Blue, Yellow pick door 1, If the answers are the same pick door 2, If Yellow, Blue pick door 3. No. This still leaves you with a 50/50 cause you won't know if it's door one or three considering the fact that you don't know which light means no or yes. This answer is wrong. You don't know which color means yes. The only way to determine which door it is according to your answer is if the car is in the middle door and you get the same light twice. """We get the same results irregardless of the truth values of the watch. If Blue, Yellow pick door 1, If the answers are the same pick door 2, If Yellow, Blue pick door 3.""" Since when did Blue and Yellow mean yes and no.. Lol, Switch the values of blue and yellow and your answers are all wrong. The Blue Blue or Yellow Yellow works tho. It would be in the middle.
You need to read my post again. I covered both cases. Either blue means yes and yellow means no, or yellow means yes and blue means no. That's two cases. The car can be behind door number 1, door number 2, or door number 3. That's three possibilities for each of the two possible truth values for the watch responses. Here's the chart I originally posted:
Blue = Yes, Yellow = No
cgg Blue, Yellow
gcg Blue, Blue
ggc Yellow, Blue
Blue = No, Yellow = Yes
cgg Blue, Yellow
gcg Yellow, Yellow
ggc Yellow, Blue
Read it as follows:
Possible Truth Values
Door orientation, Watches answer to question one, watches answer to question two.
Notice the questions are crafted in such a way that the watch responses are unique to each door, but the same regardless of which color means yes or no.
If you still don't follow, I can write out every case.
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On September 19 2006 08:31 Pacifist wrote:Show nested quote +On September 19 2006 08:24 Ethenielle wrote:On September 19 2006 08:05 GrandInquisitor wrote:
2. You have a very nice, shiny watch. But this is no ordinary watch. This watch can answer two yes or no questions 100% accurately per day. You ask, and either a blue or yellow light will flash. Unfortunately, you don't know which light means yes and which light means no, and you can never find out because there's a 50-50 chance of the lights switching every night.
You happen to be on a game show. The rules are simple. There are three doors. Behind two are goats. Behind one is a shiny red car. Obviously, you want the car. You can choose any door, after asking the watch two questions.
What are the two yes/no questions you can ask so that you will have a 100% guaranteed chance of getting the car? + Show Spoiler +I'm not entirely sure if it's allowed, but you could just ask "are there goats behind these two doors?", if you get a yes, then it's the third door, if you get a no you can ask "is there a goat behind this door(= one of the two doors you chose)", if no then it's the car, if yes then it's the other. If you can't ask about two doors at once, though..  + Show Spoiler +You don't know which light means yes and which light means no.
[spoiler] 1. Ask is there goat in door 1, 2? If you get blue, assume it means no. 2. Ask if there is goat in door 3. If you get blue, that means car is door 3. If you get yellow, then that means blue = yes. Thus, goat is in door 3.[spoiler]
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lol im havin trouble followin, i dont want you to spell it for me but if u did id love u 
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1. Ask is there goat in door 1, 2? If you get blue, assume it means no. 2. Ask if there is goat in door 3. If you get blue, that means car is door 3. If you get yellow, then that means blue = yes. Thus, goat is in door 3.
Um.. If you ask the first question, then you already will know that the answer to the second question is the opposite color that the watch flashed the first time... I don't think you've solved it with 1 question.
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On September 19 2006 18:21 kdog3682 wrote:Show nested quote +On September 19 2006 08:31 Pacifist wrote:On September 19 2006 08:24 Ethenielle wrote:On September 19 2006 08:05 GrandInquisitor wrote:
2. You have a very nice, shiny watch. But this is no ordinary watch. This watch can answer two yes or no questions 100% accurately per day. You ask, and either a blue or yellow light will flash. Unfortunately, you don't know which light means yes and which light means no, and you can never find out because there's a 50-50 chance of the lights switching every night.
You happen to be on a game show. The rules are simple. There are three doors. Behind two are goats. Behind one is a shiny red car. Obviously, you want the car. You can choose any door, after asking the watch two questions.
What are the two yes/no questions you can ask so that you will have a 100% guaranteed chance of getting the car? + Show Spoiler +I'm not entirely sure if it's allowed, but you could just ask "are there goats behind these two doors?", if you get a yes, then it's the third door, if you get a no you can ask "is there a goat behind this door(= one of the two doors you chose)", if no then it's the car, if yes then it's the other. If you can't ask about two doors at once, though.. + Show Spoiler +You don't know which light means yes and which light means no. [spoiler] 1. Ask is there goat in door 1, 2? If you get blue, assume it means no. 2. Ask if there is goat in door 3. If you get blue, that means car is door 3. If you get yellow, then that means blue = yes. Thus, goat is in door 3.[spoiler]
dude how can you assume lol you have no idea if its yes or no... if its telling you yes and its blue ur *#&$ed lol
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Looks like this simplifies even better than I thought. The second case isn't blue, blue and yellow, yellow. It is always blue, blue! I guess I was rushing my logic before. ^_^;
This is a breakdown of every case. I start out with the entire question and begin with the inner piece. I then work my way out until I've answered the original question. Think of it as substitution.
Case 1: Door 1 = Car, Door 2 = Goat, Door 3 = Goat
-Subcase 1: Blue = Yes, Yellow = No
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> Yes
*Yes -> Blue
*(the answer to the question "Is the car behind door 1 or 2?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> Blue
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> No
*No -> Yellow
*(the answer to the question "Is the car behind door 2 or 3?" ) = yellow
*Is (yellow) blue? -> No
*No -> Yellow
-Subcase 2: Blue = No, Yellow = Yes
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> Yes
*Yes -> Yellow
*(the answer to the question "Is the car behind door 1 or 2?" ) = yellow
*Is (yellow) blue? -> No
*No -> Blue
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> No
*No -> Blue
*(the answer to the question "Is the car behind door 2 or 3?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> Yellow
Conclusion: For both possibilities of the truth values for blue/yellow, the response to the questions will be Blue for #1 and Yellow for #2.
Case 2: Door 1 = Goat, Door 2 = Car, Door 3 = Goat
-Subcase 1: Blue = Yes, Yellow = No
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> Yes
*Yes -> Blue
*(the answer to the question "Is the car behind door 1 or 2?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> Blue
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> Yes
*Yes -> Blue
*(the answer to the question "Is the car behind door 2 or 3?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> Blue
-Subcase 2: Blue = No, Yellow = Yes
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> Yes
*Yes -> Yellow
*(the answer to the question "Is the car behind door 1 or 2?" ) = yellow
*Is (yellow) blue? -> No
*No -> Blue
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> Yes
*Yes -> Yellow
*(the answer to the question "Is the car behind door 2 or 3?" ) = yellow
*Is (yellow) blue? -> No
*No -> Blue
Conclusion: For both possibilities of the truth values for blue/yellow, the response to the questions will be Blue for #1 and Blue for #2.
Case 3: Door 1 = Goat, Door 2 = Goat, Door 3 = Car
-Subcase 1: Blue = Yes, Yellow = No
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> No
*No -> Yellow
*(the answer to the question "Is the car behind door 1 or 2?" ) = yellow
*Is (yellow) blue? -> No
*No -> yellow
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> Yes
*Yes -> Blue
*(the answer to the question "Is the car behind door 2 or 3?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> Blue
-Subcase 2: Blue = No, Yellow = Yes
Is (the answer to the question "Is the car behind door 1 or 2?" ) blue?
*Is the car behind door 1 or 2?" -> No
*No -> Blue
*(the answer to the question "Is the car behind door 1 or 2?" ) = blue
*Is (blue) blue? -> Yes
*Yes -> yellow
Is (the answer to the question "Is the car behind door 2 or 3?" ) blue?
*Is the car behind door 2 or 3?" -> Yes
*Yes -> Yellow
*(the answer to the question "Is the car behind door 2 or 3?" ) = yellow
*Is (yellow) blue? -> No
*No -> Blue
Conclusion: For both possibilities of the truth values for blue/yellow, the response to the questions will be Yellow for #1 and Blue for #2.
Final Conclusion: If the answers are #1 Blue #2 Yellow, pick the first door. If the answers are #1 Blue #2 Blue, pick the second door. If the answers are #1 Yellow #2 Blue, pick the third door.
Edit: Damn smilies.
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they're good riddles, only some of the answers are too long. short answers would be better...anyone else got any more?
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simple answer for #2 + Show Spoiler + question 1 "is the car behind door 1 red?" question 2 "is the card behind door 2 red?" if the watch flashes a color it means that the car is behind that door. if the car isn't behind that door, the question doesn't make sense and therefore, the watch wont flash anything. if the watch doesnt flash something on both doors, it means the car is behind door 3.
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looking over LLT's post... @_@. trying to make sense of it.
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United States24669 Posts
This thread is another example of how people post before reading what other people have said...often completely contradicting what has already been proven....so many lazy ppl ._. I mean look at how many people gave the wrong answer for the brick boat and lake problem after it was solved...
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Didn't read all posts .. though no1 is pretty easy ... u burn string 1 from both sides and string 2 from one side at the same time. After the 1st string is burned u burn 2nd string from 2nd side. GG no re
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Korea (South)17174 Posts
ltt, in your original post you put " "Is the car behind door 1 or 2?" blue? " with the parenthesis fucked so i missread, i didn't read your long post but i assume it is also just a very complicated way to do the solution
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can someone put all the answers in one post?
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Aotearoa39261 Posts
Your plane crashed in the middle of an unknown jungle and everyone except you was killed, nothing remained in the plane as it burnt to a crisp. You walk for a while, and find a path... you follow it. After about 30 minutes of walking you reach a fork, with a man standing on the far left, and another of the far right of the fork. There is a sign in the middle which reads "Eternal bliss awaits those who venture down one path. Those who venture down the other will be tortured and killed. These two men will help you, they will answer one, and only one question which you ask them. One of these men will always tell you the truth, the other will always lie."
What question do you ask to find out the correct path? Goodluck :D
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Lots of people don't seem to understand, so I'm going to explain in detail about #2:
+ Show Spoiler +Q1: If I ask is there a car behind 1 will you light in blue? Q2: If I ask is there a car behind 3 will you light in blue? This way the answers will always be the same no matter which color means yes and which no. Car at 1 - Blue, Yellow Blue = Yes, Yellow = No Q1: The car is at 1, so the answer to "Is there a car behind 1" is yes - Blue To the full question it has to answer yes, because it will light Blue, so in the end the answer will be yes - Blue Q2: The car is not at 3, so the answer to "Is there a car behind 3" is no - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Yellow Blue = No, Yellow = Yes Q1: The car is at 1, so the answer to "Is there a car behind 1" is yes - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Blue Q2: The car is not at 3, so the answer to "Is there a car behind 3" is no - Blue To the full question it has to answer yes, because it will light Blue, so in the end the answer will be yes - Yellow Car at 2 - Yellow, Yellow Blue = Yes, Yellow = No The car is not at 1, so the answer to "Is there a car behind 1" is no - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Yellow The car is not at 3, so the answer to "Is there a car behind 3" is no - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Yellow Blue = No, Yellow = Yes Q1: The car is not at 1, so the answer to "Is there a car behind 1" is no - Blue To the full question it has to answer no, because it will light Blue, so in the end the answer will be no - Yellow Q2: The car is not at 3, so the answer to "Is there a car behind 3" is no - Blue To the full question it has to answer yes, because it will light Blue, so in the end the answer will be yes - Yellow Car at 3 - Yellow, Blue Blue = Yes, Yellow = No Q1: The car is not at 1, so the answer to "Is there a car behind 1" is no - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Yellow Q2: The car is at 3, so the answer to "Is there a car behind 3" is yes - Blue To the full question it has to answer yes, because it will light Blue, so in the end the answer will be yes - Blue Blue = No, Yellow = Yes Q1: The car is not at 1, so the answer to "Is there a car behind 1" is no - Blue To the full question it has to answer yes, because it will light Blue, so in the end the answer will be yes - Yellow Q2: The car is at 3, so the answer to "Is there a car behind 3" is yes - Yellow To the full question it has to answer no, because it will light Yellow, so in the end the answer will be no - Blue ... For those wondering what would Blue, Blue mean: there are cars behind both door 1 and door 3  Ofc, it there are lots of possible 2 question combinations to solve the riddle, they could be for cars at 1/2 or 2/3 or goats behind 2 door combinations or yellow instead of blue, it doesn't matter.
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Plexa, exact this riddle was solved and explained by Day in other thread about puzzles few months back. But good one for those who never heard it.
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EPT
