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Replies: 35
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Oculus Spirit [81628]
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Fun Riddle
Apr 1, 2016, 2:13 PM
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http://fivethirtyeight.com/features/can-you-solve-the-impossible-puzzle/
Three very skilled logicians are sitting around a table — Barack, Pete and Susan. Barack says: “I’m thinking of two natural numbers between 1 and 9, inclusive. I’ve written the product of these two numbers on this paper that I’m giving to you, Pete. I’ve written the sum of the two numbers on this paper that I’m giving to you, Susan. Now Pete, looking at your paper, do you know which numbers I’m thinking of?”
Pete looks at his paper and says: “No, I don’t.”
Barack turns to Susan and asks: “Susan, do you know which numbers I’m thinking of?” Susan looks at her paper and says: “No.”
Barack turns back to Pete and asks: “How about now? Do you know?”
“No, I still don’t,” Pete says.
Barack keeps going back and forth, and when he asks Pete for the fifth time, Pete says: “Yes, now I know!”
First, what are the two numbers? Second, if Pete had said no the fifth time, would Susan have said yes or no at her fifth turn?
Message was edited by: soccerkrzy®
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Legend [17337]
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7***
Apr 1, 2016, 2:15 PM
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Heisman Winner [105478]
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SIXTY NINE***
Apr 1, 2016, 2:17 PM
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Oculus Spirit [81628]
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It cannot be 6&9***
Apr 1, 2016, 2:29 PM
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Heisman Winner [105478]
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DID I STUTTER?***
Apr 1, 2016, 2:33 PM
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Oculus Spirit [75683]
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Oculus Spirit [81628]
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Because the product of 6&9 is unique in the number set***
Apr 1, 2016, 2:34 PM
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Oculus Spirit [75683]
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This only lost me more.***
Apr 1, 2016, 2:36 PM
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All-In [40344]
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where is the fun part?***
Apr 1, 2016, 2:28 PM
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Oculus Spirit [81628]
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Figuring it out?***
Apr 1, 2016, 2:29 PM
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Heisman Winner [105478]
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*fingering it out***
Apr 1, 2016, 2:33 PM
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All-In [40344]
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maybe it's the borderline millenial in me
Apr 1, 2016, 2:41 PM
[ in reply to Figuring it out?*** ] |
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but i wanna see an answer now
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Oculus Spirit [75683]
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I want to see now because I have no idea of how to
Apr 1, 2016, 2:45 PM
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figure it out. I reckon I am missing a clue somewhere.
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Oculus Spirit [81628]
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So lube up your finger...
Apr 1, 2016, 2:45 PM
[ in reply to maybe it's the borderline millenial in me ] |
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You know it's two numbers 1 - 9, can be the same.
He asks the guy with the product of the two numbers if he knows the answer, he says no, so now you can rule out all the unique product numbers.
He asks the girl with the sumb of the two numbers if she knows the answer, she can use the information of the ruled out numbers from the products...but she says no, so now you can rule out the unique numbers...
etc...until round 5
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Heisman Winner [135504]
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Obviously, it's 666.
Apr 1, 2016, 3:01 PM
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BECAUSE MATH IS SATANIC WIZARDRY.
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All-In [38514]
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pigs of Susan?***
Apr 1, 2016, 2:33 PM
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Rock Defender [53]
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Thanks Obama.***
Apr 1, 2016, 2:35 PM
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CU Medallion [54011]
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Drinking so I will give it a shot...
Apr 1, 2016, 3:08 PM
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The numbers are 3 and 6. And there is no way to know Susan's response after her 5th turn...
I haven't even fugged her yet.
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Oculus Spirit [81628]
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Re: Drinking so I will give it a shot...
Apr 1, 2016, 3:12 PM
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3&6 is incorrect, how did you get to that answer? Second part is wrong too!
Sorry you haven't fugged her
Here's a picture of a hot Susan:
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CU Medallion [54011]
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Just fugged her...
Apr 1, 2016, 3:14 PM
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Sort of.
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Orange Blooded [2247]
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The answer is 2 & 4 and No she would not know for sure.
Apr 1, 2016, 3:16 PM
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nm
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Oculus Spirit [81628]
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Numbers are wrong.
Apr 1, 2016, 3:31 PM
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2 & 4 are actually never eliminated.
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Orange Blooded [2247]
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Re: Numbers are wrong.
Apr 1, 2016, 3:36 PM
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2&4 are never eliminated, which I would deduce to be the 2 numbers. So Pete and 8 and Susan had 6. Susan would not have gotten yet because 1 is also not eliminated on her side.
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Oculus Spirit [81628]
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See my work below in this thread. What are you doing?***
Apr 1, 2016, 3:38 PM
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Orange Blooded [2247]
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Re: Numbers are wrong.
Apr 1, 2016, 3:38 PM
[ in reply to Numbers are wrong. ] |
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I assumed it had to be 2 separate numbers.
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Oculus Spirit [81628]
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Hmm, he does say two natural numbers...crap***
Apr 1, 2016, 3:39 PM
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Orange Blooded [2247]
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Re: Hmm, he does say two natural numbers...crap***
Apr 1, 2016, 3:44 PM
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I didn't use a spread sheet....just a post it note, and eliminated all obvious answers after each turn. I was left with
Sum Side Product Side
1+4 2x4
2+4
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Oculus Spirit [81628]
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Doesn't work if you rule out same numbers.
Apr 1, 2016, 3:51 PM
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Don't even get past Round 2 and they're all eliminated.
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Heisman Winner [105478]
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Rock Defender [53]
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I've got it narrowed down to
Apr 1, 2016, 3:19 PM
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2 & 9
3 & 8
4 & 6
Am I on the right track?
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Oculus Spirit [81628]
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None of those.***
Apr 1, 2016, 3:31 PM
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Rock Defender [53]
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####.***
Apr 1, 2016, 3:31 PM
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Oculus Spirit [81628]
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Here's my work shown
Apr 1, 2016, 3:33 PM
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Heisman Winner [105478]
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Nice work! Here is my peanor
Apr 1, 2016, 3:37 PM
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just kidding, but you fagits clicked to see it anyways.
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Oculus Spirit [75683]
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Only if you use the wrong view.***
Apr 1, 2016, 3:53 PM
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All-In [38514]
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2 & 8***
Apr 1, 2016, 4:00 PM
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Replies: 35
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50
