... I'm not really familiar with this but do you have any specific questions? Looking at the article it's plausible that the problem is difficult since it...
14013
Sourabh Gandhi
sourabh_gandhi
Mar 6, 2010 5:05 pm
http://vedicmath.50webs.com [Non-text portions of this message have been removed]...
14014
Tofique Fatehi
tofiquef
Mar 8, 2010 11:50 pm
I have added this solid geometrical fun page to my web-page: ...
14015
Tofique Fatehi
tofiquef
Mar 12, 2010 1:45 am
A "done" Rubik's cube may be said to be in a state of "sanity" You rotate any one face (clockwise or anticlockwise) and it reaches the first stage of...
14016
Edward Moore
emoore06905
Mar 12, 2010 3:18 am
Wow - great questions! Not only do I hope you get your answers, I hope you share them with the rest of us :) Ed ________________________________ From: Tofique...
14017
bogaduck
Mar 12, 2010 3:43 am
Using your terminology, I have often wondered if there is a standard state of insanity used in "competition solving races". Peter...
14018
wondering_one123
wondering_on...
Mar 12, 2010 6:39 pm
That's an interesting question. In theory, I would think that the second question would be easier because you simply do exponential increase, but then I...
14019
video_ranger
Apr 4, 2010 1:29 pm
Two logicians A and B are introduced to each other by a mutual friend F: F: "You two were born exactly one day apart" A: "Is your birthday one day before or...
14020
whk726
Apr 4, 2010 3:42 pm
... Tne "month" relates to a true lunar month Excluding 3/1 & 3/2 due to febs. brevity A Wild A_ _ Guess...
14021
video_ranger
Apr 5, 2010 11:52 am
... No, it's just the ordinary calendar - no trick. Just to be clear, the problem is relatively uncomplicated: A knows his own birthday (March 3) and knows B's...
14022
bogaduck
Apr 5, 2010 2:54 pm
A's birthday is the third, so knows B is 2nd or 4th. If B's was the 2nd, he would know A's is either 1st or 3rd. If A's birthday was the 1st, A would know his...
14023
slim_the_dude
Apr 5, 2010 6:41 pm
... Just because the answer came a few questions after F told them it was in the same month doesn't mean that any information was introduced. In general, it...
14024
video_ranger
Apr 6, 2010 1:56 pm
... My thinking is that Peter's explanation of A's reasoning is correct and depends on, and could only follow the statement that both birthdays were in the...
14025
Edward Moore
emoore06905
Apr 6, 2010 2:31 pm
My thought was that this only works if A's birthday is on the 3rd (or the 29th), and A is the one who figues it out. Haven't thought it out, but I think it's...
14026
Tofique Fatehi
tofiquef
Apr 6, 2010 4:08 pm
This is an old puzzle, and my favorite. One man is telling his friend: A few years ago, my father and my uncle, who are twin brothers born within a few minutes...
14027
clooneman2000
Apr 7, 2010 12:38 pm
The father was born close to midnight on February 28th 1900. The uncle was born after midnight in the morning of March 1st 1900. 1900 was not a leap year. 100...
14028
clooneman2000
Apr 7, 2010 12:50 pm
A knows that he was born on March 3. B knows that he was born on March 4. After F's introduction, A knows that B was born on either March 2 or 4; B knows that...
14029
Tofique Fatehi
tofiquef
Apr 7, 2010 12:52 pm
Yes---Â "one fine morning on the same day" is very important. And the father - who was born before the uncle celeberated his 100th birthday after the uncle...
14030
Edward Moore
emoore06905
Apr 7, 2010 1:00 pm
A also knows that B knows that A's birthday is either March 1st, 3rd, or 5th, and B knows that A knows that B was born on March 2nd, 4th, or 6th. When the...
14031
video_ranger
Apr 7, 2010 10:25 pm
Maybe the mother was crossing the international date line - like on a ship? Going which ever way makes the date go backwards - with the oldest being born on...
14032
video_ranger
Apr 7, 2010 10:27 pm
... Yes. F's statement gives new information (I think). Clooneman: F knows both birthdays....
14033
slim_the_dude
Apr 7, 2010 10:30 pm
Yes, I must have misunderstood. I was wrong when I said there wasn't useful new information....
14034
video_ranger
Apr 7, 2010 10:36 pm
In the problem with the logicians and hats (that you posted), it seemed a little uncanny that everyone already knew the first logician would say "I don't know"...
14035
slim_the_dude
Apr 7, 2010 10:37 pm
But then they wouldn't have been born on the same day, as the problem said....
14036
Tofique Fatehi
tofiquef
Apr 8, 2010 1:53 am
You got it. Â The father was born on a ship travelling from west to east, close to the International Date Line (IDL), on the 1st of March. Immediately after...
14037
bogaduck
Apr 8, 2010 4:02 am
... But they would have been born on the same day - just not the same date!!! A day is a day is day. Just because someone decides to call it "Monday the...
14038
cscmw
Apr 8, 2010 12:35 pm
I'd like to learn some maths and programming to deal with simulating group behaviors of small animals. Can anybody here give me some hint? Thank you very much...
14039
Tofique Fatehi
tofiquef
Apr 9, 2010 10:46 am
When I had posed this problem to my College group and sent the solution later, somebody pointed out that the Nautical International Date Line came into...
14040
clooneman2000
Apr 9, 2010 5:02 pm
Yes, F knows both birthdays; I knew that and still I asked it, hmmm... :/ Going soft in my old age I think!...
