[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]

2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

File: 492 KB, 3072x3066, 20190213_235713.jpg [View same] [iqdb] [saucenao] [google]

I solved this riddle in half an hour, what's my IQ? Anonymous Wed Feb 13 17:16:22 2019 No.10385251 [Reply] [Original]

You have 2 doors, one leads to a billion dollars and the other leads to some shit you dont want.
There is a guard in front of each door, one is always lying and the other is always telling the truth.
You dont know which guard is lying and you dont know which door leads to the billion dollars.
you can ask a guard only one question in order to get to the billion dollars, what question will you ask?

>>	Anonymous Wed Feb 13 17:20:27 2019 No.10385265 >>10385251 >I got half an hour into "The Labyrinth," what's my IQ

>>	Anonymous Wed Feb 13 17:21:36 2019 No.10385268 are you in front of the door to the shit i don't want

>>	Anonymous Wed Feb 13 17:23:31 2019 No.10385277 >>10385268 You are in front of both

>>	Anonymous Wed Feb 13 17:26:16 2019 No.10385286 >>10385251 >you can ask a guard only one question in order to get to the billion dollars, what question will you ask? Does God exist?

>>	Anonymous Wed Feb 13 17:30:49 2019 No.10385303 >>10385251 “which door would the other guard tell me the billion dollars is behind?” the go in the opposite >>10385265 fuck yeah crack sip

>>	Anonymous Wed Feb 13 17:31:07 2019 No.10385304 Will you kill the other guard?, then wait

>>	Anonymous Wed Feb 13 17:32:12 2019 No.10385308 >>10385277 fuck off, that's literally the answer to this gay riddle that everyone has heard a thousand times. you stand in front of one of the guards and ask that.

Anonymous Wed Feb 13 17:36:29 2019 No.10385321

>>10385268
what would the other guard say if i ask him if he's guarding the billion dollars?
"yes" = go into this door
"no" = go into the other guard's door
OP's IQ : 70. took him a half hour

>>10385251
i'm black and it took me 3 minutes and average black IQ is 85. that means OP must be somewhere between 70-85

>>	Anonymous Wed Feb 13 17:37:58 2019 No.10385327 >>10385321 good work nigger

Anonymous Wed Feb 13 18:59:07 2019 No.10385546

>>10385268
>>10385308
>calls out OP for posting a riddle everyone has heard a thousand times
>gives the wrong answer

Anyway, here's a similar, but harder riddle: There are three guards and two doors, one leads to <bad place>, the other leads to <good place>. Each of the guards either always tells the truth or always lies. One of them tells you that "two of us are liars". You only get to ask one question after this, what do you ask?

>>	Anonymous Wed Feb 13 19:32:57 2019 No.10385632 >>10385546 Same question, the guards that didnt say anything act as one. If there are two liers then its the other guards, if not then the one guard is the lier.

Anonymous Wed Feb 13 19:38:45 2019 No.10385644 [DELETED]

"I associate the truthful guard to the myuneez and the lying guard to the random shit. What's your door?" to any guard.

"Show me the door you'd show me if I asked you where the money is." to any guard.

If you needed half an hour, your IQ is worrying.

>>	Anonymous Wed Feb 13 19:47:08 2019 No.10385655 File: 297 KB, 1300x1300, 1547105304537.jpg [View same] [iqdb] [saucenao] [google] >>10385303 >lying guard says "I don't know" >truth telling guard says the lying guard would not tell you a door your move anon

>>	Anonymous Wed Feb 13 19:56:49 2019 No.10385680 >>10385655 >truth telling guard says the lying guard would not tell you a door Now ask this guard which door leads to the money

>>	Anonymous Wed Feb 13 20:06:32 2019 No.10385696 File: 119 KB, 583x482, 1548672444364.png [View same] [iqdb] [saucenao] [google] >another IQ thread

Anonymous Wed Feb 13 20:07:27 2019 No.10385700

>>10385546
Ask "If I asked every guard to whether this door has a billion dollars behind it, would an odd number of them say yes?"
The answer to this question is yes for all three possibilities for which guards are liars.

T LL: If good door, 1 would say good. If bad door, 2 would say good. Original guard is honest about odd/even.
L LL: If good door, 0 would say good. If bad door, 3 would say good. Original guard lies.
L TT: If good door, 2 would say good. If bad door, 1 would say good. Original guard lies.

>>	Anonymous Wed Feb 13 20:13:53 2019 No.10385717 >>10385696 fuck off frogposter

>>	Anonymous Thu Feb 14 08:51:02 2019 No.10386978 >>10385251 What is 1 + 1

>>	Anonymous Thu Feb 14 09:58:20 2019 No.10387085 >>10385251 I would ask the guard a very important question, humanity hasn't the answer to. Screw the billion dollars, there is a 50% chance that we might learn something very important.

>>	Anonymous Thu Feb 14 10:25:44 2019 No.10387124 >>10385321 I'm pretty sure the answer is do the opposite regardless, but I don't want to use my brain to prove it. My chocolatey friend.

Anonymous Thu Feb 14 11:29:18 2019 No.10387219

>>10387085
He could answer "idk" and the and it'd be true. The lying one would just say some bs. They're only compelled to tell the truth, not know everything, the chances are much lower than 50% of getting a good answer to a question of the caliber you're proposing.

Anonymous Thu Feb 14 11:34:42 2019 No.10387227
File: 9 KB, 480x360, hqdefault.jpg [View same] [iqdb] [saucenao] [google]

>>10385251
"Are you the one that tells the truth?"
"Alright thanks"
You may have a billion dollars but I know which guard tells the truth and who doesnt.
I have the knowledge, and that you cant buy.

Anonymous Thu Feb 14 12:08:20 2019 No.10387289

>>10387227
Responses to “are you the liar?”
Truth teller: no
Liar: no

Responses to “is the money behind this door?”
Truth teller: yes
Liar: yes

This is a probability question. It’s the same as the 3 door gameshow question, aside from it being more binary.

>>	Anonymous Thu Feb 14 12:11:43 2019 No.10387301 There’s no solution with 100% accuracy.

>>	Anonymous Thu Feb 14 12:20:53 2019 No.10387325 >>10386978 So you still dont know if his door leads to the billion

Anonymous Thu Feb 14 13:02:00 2019 No.10387416

>>10387325
OK then, addressing the guard:
"You have an answer string. If one thought something was true, you'd add A. If one thought it was false, you'd add B. Your single answer could be AA, BB, AB, or BA. There are 2 scenarios.
1) 1 + 1 = 2
2) the door you're guarding has a billion dollars
What is your answer?"
It's one question

>>	Anonymous Thu Feb 14 14:22:45 2019 No.10387620 >>10387416 You can formulate two questions into a single one but that's not the point of the question, there's a logical way to figure it out

>>	Anonymous Thu Feb 14 14:28:31 2019 No.10387635 >>10387620 The point of it was to solve the riddle ;)

>>	Anonymous Thu Feb 14 14:40:11 2019 No.10387669 >>10385251 I got this answer >>10385303 in less than 3 minutes. Genius IQ CS major checking in. We are hard wired to think logically, and such puzzles are mere trifles for us.

>>	Anonymous Thu Feb 14 14:42:10 2019 No.10387679 >>10387289 >This is a probability question. Imagine being this much of a brainlet

>>	Anonymous Thu Feb 14 15:02:14 2019 No.10387741 File: 12 KB, 275x275, Glock-17-9mm_main-1.jpg [View same] [iqdb] [saucenao] [google] I would calmly ask both guards to step away from the door

>>	Anonymous Thu Feb 14 17:42:43 2019 No.10388183 >>10387669 >retarded codeslave reporting in >we are mentally conditioned to perform one task >I agree with this post because I want dopamine points for posting

Anonymous Thu Feb 14 18:45:07 2019 No.10388308

>>10385251
The classic answer is ask "what would your brother say" (or some shit like that).
But, I've been thinking about it and I came up with another valid solution. Approach one of the two guards and ask him "What would you say if I asked you: 'is the money behind your door'". WLOG say the money is behind this guard's door. If he is the liar, his answer to the subquestion "is the money behind your door" would be "no". Because he has to lie, his answer to the primary question would have to be yes. If the guard is on the truth-teller then his answer to the subquestion would be yes, and his answer to the primary question would be yes as well.

>>	Anonymous Thu Feb 14 19:10:49 2019 No.10388360 >>10388308 Woah woah woah, is this a paradox? How can the liar answer the question?

>>	Anonymous Fri Feb 15 01:14:13 2019 No.10388987 >>10388308 Holy fuck I think this actually works. Kudos anon

>>	Anonymous Fri Feb 15 01:25:53 2019 No.10389008 >>10385321 Based and nigpilled.

>>	Anonymous Fri Feb 15 02:34:14 2019 No.10389078 >>10388308 sorry but the answer to the question "what would you say if X?" can always be "I will say the truth." they don't have to answer the subquestion if they are assholes

>>	Anonymous Fri Feb 15 03:00:54 2019 No.10389116 >>10389078 >they don't have to answer the subquestion if they are assholes You can force them to answer it by asking "would you say yes or no if X?".

>>	Anonymous Fri Feb 15 03:28:00 2019 No.10389144 >>10385251 Gentoo

>>	Anonymous Fri Feb 15 04:04:44 2019 No.10389175 https://youtu.be/HBEEBXsFeRk have non of you anons watched this based cartoon?

Anonymous Fri Feb 15 04:50:17 2019 No.10389229

>>10387219
But by definition to always tell the truth, you have to know everything. You have to assume the guard is omniscient, otherwise he couldn't know anything for sure.
For example if you asked him if he has the money, he would be compelled say I don't know. Because he can't know for sure the money is behind the door. Maybe it was stolen, or maybe the guy who made him a guard was lying etc.

>>	Anonymous Fri Feb 15 10:57:10 2019 No.10389760 >>10388987 >>10388360 >>10388308 Samefag.

>>	Anonymous Fri Feb 15 11:08:27 2019 No.10389778 "Would the other guard tell me his door has the money?"

>>	Anonymous Fri Feb 15 14:41:21 2019 No.10390251 File: 92 KB, 305x237, fsdffslu.png [View same] [iqdb] [saucenao] [google] >>10389116 >asking an or question

>>	Anonymous Fri Feb 15 14:46:18 2019 No.10390258 >>10389078 You can always give a non-useful 'answer', you're just adding a bullshit layer to the problem. https://youtu.be/PZbqAMEwtOE

>>	Anonymous Fri Feb 15 16:28:17 2019 No.10390478 >>10390251 What's your point?

>>	Anonymous Fri Feb 15 16:35:08 2019 No.10390495 >>10390478 is it a logical or, or is it giving the option it would say? whoknows kindof like the smug people who say "yes" to either-or questions

>>	Anonymous Fri Feb 15 16:38:06 2019 No.10390498 >>10385251 "Look here, man, there is a billion dollars behind one of these doors. Don't say a word, just led me through the door with the billion and half is yours."

>>	Anonymous Fri Feb 15 17:29:31 2019 No.10390590 >>10388308 The mental gymnastics performed in this post is astounding.

Advanced search
Text to find
Subject [?]Search by post subject. Leave empty for any.
Username [?]Search for user name. Leave empty for any user name.
Tripcode [?]Search for tripcode. Leave empty for any.
Email [?]Search by email. Leave empty for any.
Filename [?]Search by image filename. Leave empty for any.
From Date [?]Enter what date to start searching from. Format is YYYY-MM-DD
To Date [?]Enter what date to start searching until. Format is YYYY-MM-DD
Image hash
Search in	All Posts OPs Only
Deleted posts	Show all posts Show only deleted posts Only show non-deleted posts
Internal posts	Show all posts Show only internal posts Show only archived posts
Order	New posts first Old posts first
Capcode	All Posts Only by Users Only by Mods Only by Admins Only by Developers
Results	Posts Threads
Action	[ Simple ]