Complex Riddle
- Thread starter sarutobi
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The OP doesn't say that they do.
Soldato
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Ugh, I knew it was this one before i entered the post, what next, will the air-plane on the conveyor take off?
Ask either guard: "If I asked the other guard, which is the door to my 47 virgins, which would he point to." Then you go into the door that the guard doesn't point to.
Ask either guard: "If I asked the other guard, which is the door to my 47 virgins, which would he point to." Then you go into the door that the guard doesn't point to.
But there are three guards!
I'm pretty sure you can't do it with one question. The random element makes it impossible to be entirely sure you will get the correct door with only one question. Your best chance would be "which door do the other two heads think leads to survival?". There's a small chance you will get an identical response from the two heads if you happen to ask the truth head the question and the alternating head happens to be lying. The same is true if you ask the lying head the question and the alternating head is telling the truth. You would then go with the opposite door if you got an identical response. In all other cases you'd get a "left and right" response so it's just 50/50 again.
Soldato
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that method still offers the highest probability of success.
Well the head you ask the question to has two heads to pick from. Those two heads can be a mix of a group of three so you may as well just ask the question "which door leads to survival". No matter how many times you do it, you will never be entirely sure you're going to survive.
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I would ask the dragon to go out of door 1.
if it dies I would go through 2, if not I would follow it.
if it dies I would go through 2, if not I would follow it.
I think I just solved it, but its late so let me check again.
Edit: OK here goes. I would ask
assuming doors are labelled A and B, A is safe and B is death
"If you start with the number 0 and add 1 if door A is safe and add another 1 if the majority of you (the dragons) are correct, is your total 2?"
That counts as a question right?
I'll let someone else run through the working before I post mine.
Edit 2: oops i forgot to say, you then go with what the majority answer is. If you ask about door A then the majority will answer yes, so its safe. if you ask about door B then the majority say no so its not safe.
Edit: OK here goes. I would ask
assuming doors are labelled A and B, A is safe and B is death
"If you start with the number 0 and add 1 if door A is safe and add another 1 if the majority of you (the dragons) are correct, is your total 2?"
That counts as a question right?
I'll let someone else run through the working before I post mine.
Edit 2: oops i forgot to say, you then go with what the majority answer is. If you ask about door A then the majority will answer yes, so its safe. if you ask about door B then the majority say no so its not safe.
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My question doesn't aim to find out which head is which, it ends up that even if two of the dragons are lying the fact that both are lying causes them to give you the right answer.
Doesnt matter, the majority still give you the right answer. If you askes about the right door then they all say Yes, and if you asked about the wrong, the one who tells the truth and the switcher say No and the liar says yes.
wait what?
You only get one question, and can only ask one (only one speaks)
A is safe B is death
You ask (with your method) is door A safe.
You ask lying head, he doesn't add 1, the switching head is lying too the majority is wrong, but their lying so they don't add one answer = 0
You ask lying head, he doesn't add one, the witching head is telling truth, majority right doesn't add one as he's lying answer = 0
You ask truthful head, he adds 1, switching head is lying, majority not correct answer =1
You ask truthful head, he adds 1, switching head telling truth majority correct answer =2
You can get 0, 1 and 2 with your method and thats just if you chose the safe door to ask about.
The switching head breaks the riddle.
You only get one question, and can only ask one (only one speaks)
A is safe B is death
You ask (with your method) is door A safe.
You ask lying head, he doesn't add 1, the switching head is lying too the majority is wrong, but their lying so they don't add one answer = 0
You ask lying head, he doesn't add one, the witching head is telling truth, majority right doesn't add one as he's lying answer = 0
You ask truthful head, he adds 1, switching head is lying, majority not correct answer =1
You ask truthful head, he adds 1, switching head telling truth majority correct answer =2
You can get 0, 1 and 2 with your method and thats just if you chose the safe door to ask about.
The switching head breaks the riddle.
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Ah, i think i see my error. I asked each of the dragons the question...forgot you only got to ask one....its late.