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Topic: Some Answers to Easy Section (Read 10368 times) |
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #25 on: Jun 6th, 2003, 9:47pm » |
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i suppose your co-workers are as qualified as you are.This becomes a barrier to accepting new information.Since they feel "i know as much as this guy does so why should i listen to him?" or it could be "i have been working like this and produced quality products,now why should i take risk and listen to this guy".
To deal with such type of people,the best way is way of Socrates "make them realise their mistake by asking them innocent looking question".
i am no psychological expert but this trick works when i have to convince my friends of my ideas.
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Self discovery comes when a man measures himself against an obstacle - Antoine de Saint Exupery
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Chronos
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Re: Some Answers to Easy Section
« Reply #26 on: Jun 11th, 2003, 1:54pm » |
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Personally, I approach any problem with the assumption that it has a simple (if perhaps tricky) solution. Most problems with difficult solutions are not worth asking in the first place.
Of course, this attitude just makes things harder for me when I do come across a genuinely difficult problem.
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fyo
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Re: Some Answers to Easy Section
« Reply #27 on: Jun 25th, 2003, 8:46am » |
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This is a bit of nitpicking regarding the answer to the Hour Glass puzzle...
TenaliRaman's suggestion was to:
1) Start both hour glasses.
2) When the 7min one runs out, "start the timer"
3) Let the 11min finish running out (4 mins).
4) Restart the 11min glass and you get 15 mins.
While correct, this is not the best way to do it. The problem is that you are limited in your ability to time the 45 minutes. If someone tells you tell him when 15 mins have past from NOW, you're dead in the water. The solution given requires (at minimum) a 7 minute head start.
The "proper" solution would be to:
TIMER STARTS NOW
1) Start both glasses.
2) When the 7min glass runs out, restart the 7min glass.
3) When the 11min glass runs out (the 7min glass has 3 minutes left), turn the 7min glass around. It will run out of sand after 4mins, giving the required 15mins total.
TIMER ENDS NOW
Sincerely,
fyo
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #28 on: Jun 25th, 2003, 1:06pm » |
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yes you are right
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Self discovery comes when a man measures himself against an obstacle - Antoine de Saint Exupery
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Elysha
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final answer to Chess Problem I (long)
« Reply #29 on: Aug 8th, 2003, 12:50am » |
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Finally we will have a solution which should look like this,
N-knight K-king Q-queen B-bishop R-rook
N 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ R
_ _ K _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _
This will not work, because neither the knight nor the bishop will be able to attack row 1 square 2. I like the formatting you've used for the answer, though, so I'm going to use it to present the three possible answers I found. There are no other answers possible, as I will show.
First I will label the positions we are filling from left to right, then top to bottom, as A, B, C, D, and E, like this:
A 1 _ _ _ 1 _ B
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ C
_ _ D _ _ _ _ _
_ _ _ _ _ _ _ _
_ E _ _ _ _ _ _
I will use these statements for further deductions: 1) Because of the 0, A cannot be the bishop or the queen. 2) D cannot be the rook or the queen. 3) B must be either the rook or the queen.
Only B, C, or E can be the queen. I'm going to look at each of these possibilities in turn.
First, Suppose E is the Queen. Then this is the only possible solution:
N 1 _ _ _ 1 _ R
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ K
_ _ B _ _ _ _ _
_ _ _ _ _ _ _ _
_ Q _ _ _ _ _ _
Here is my reasoning: Suppose E is a queen.
Then B is a rook. (see B)
Then D, in order to attack row 4, square 5, must be a bishop.
A is not a king, because row 1 square 2 can only be attacked by the queen in E. A has to be a knight, the only possibility remaining to it.
If A is a knight, then the only position left to the king is C.
Now, let's suppose C is a queen.
If C is queen, then E must be the bishop, to threaten the position C fails to threaten. In this case, there are no pieces left that can move horizontally. Neither B nor D can threaten the position between them. This is a contradiction, and it is not possible for C to be the queen.
Now, the third possibility: let's suppose B is the queen. I found two possible solutions (similar to yours):
R 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ K
_ _ N _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _
Also:
K 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ R
_ _ N _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _
Reasoning: Suppose B is the queen. Then D is not the bishop, but is either the knight or the king. Now, there are two possibilities: either E is not the bishop, or E is the bishop. First, suppose E is not the bishop.
If E is not the bishop, then C is the knight.
Now, D is not allowed to move diagonally because B is the queen. D is also not allowed to move vertically, because it would threaten the position that isn't threatened by anything. The only pieces left to D by this are knight and king. Since C is the knight, D must be the king.
The only position left for the bishop to fill is A. A is not allowed to be a bishop. This is a contradiction.
Therefore, if B is the queen, E cannot be anything but a bishop.
Can E be a bishop?
Let's try that second case. B is a queen; E is a bishop.
Then C is either a rook or a king, and A is either a rook or a king. Since rook and king must be divided up someway between those two positions, the only position left to D is knight. There are two possible scenarios: either the rook is in position C and the king is in D, or vice versa.
In sum, three possible scenarios and no others.
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wowbagger
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Re: final answer to Chess Problem I
« Reply #30 on: Aug 8th, 2003, 4:21am » |
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Elysha, you obviously invested a lot of time and effort. So sorry in advance for disproving your suggestions (or at least trying to do so).
I have the impression you misinterpreted the riddle. There are no other pieces on the board. "Green numbers indicate how many pieces could move to that square on the next move." This means that the square f8 (standard chess notation for top row, column 6) doesn't block the piece on h8 (top row, col. 8) from moving to b8 (top row, col. 2), for example.
on Aug 8th, 2003, 12:50am, Elysha wrote:Finally we will have a solution which should look like this,
N-knight K-king Q-queen B-bishop R-rook
N 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ R
_ _ K _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _
This will not work, because neither the knight nor the bishop will be able to attack row 1 square 2. |
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Actually, it does work. The queen attacks the square b8.
Quote:First, Suppose E is the Queen. Then this is the only possible solution:
N 1 _ _ _ 1 _ R
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ K
_ _ B _ _ _ _ _
_ _ _ _ _ _ _ _
_ Q _ _ _ _ _ _ |
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Not valid, because b8 is attacked by queen and rook, so it would have to have a "2" instead of a "1".
Quote:Now, the third possibility: let's suppose B is the queen. I found two possible solutions (similar to yours):
R 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ K
_ _ N _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _ |
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Not valid, because b8 and f8 are attacked by queen and rook.
Quote:Also:
K 1 _ _ _ 1 _ Q
_ _ _ _ _ _ _ _
_ _ 0 _ _ _ _ _
_ _ _ _ 1 1 _ _
_ _ _ _ _ _ _ R
_ _ N _ _ _ _ _
_ _ _ _ _ _ _ _
_ B _ _ _ _ _ _ |
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Not valid, because b8 is attacked by king and queen.
By the way, the solution TenaliRaman gave for Chess Puzzle II is also correct.
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| « Last Edit: Aug 8th, 2003, 4:28am by wowbagger » |
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Elysha
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Re: Some Answers to Easy Section
« Reply #31 on: Aug 8th, 2003, 3:46pm » |
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Thanks a million! Whyever didn't I see that?
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Elysha
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Re: Some Answers to Easy Section
« Reply #32 on: Aug 8th, 2003, 4:14pm » |
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Any moderator should feel to clear away my post if it's clogging things up. It appears that I managed to post in the wrong thread anyway; I thought I had read some discussion of Chess Problem I in these pages, but I cannot find it anymore.
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wowbagger
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Re: Some Answers to Easy Section
« Reply #33 on: Aug 8th, 2003, 4:34pm » |
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on Aug 8th, 2003, 4:14pm, Elysha wrote:| Any moderator should feel to clear away my post if it's clogging things up. It appears that I managed to post in the wrong thread anyway; I thought I had read some discussion of Chess Problem I in these pages, but I cannot find it anymore. |
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Ha! The moderator who clears up all posts on this forum that are clogging things up hasn't been born yet! 
But just in case he has and should happen to read this: Please start with the 0.999-thread. Oh, and have a particularly watchful eye for these duplicate threads. 
And never mind posting to the wrong thread, this happens a lot to newbies. By the way, as a member, you can modify (and remove) your posts.
With regard to your wrong answers: This happens even to Überpuzzlers. 
To quote a sig (sorry, I don't remember whose it is/was): "It is better to have puzzled and failed than never to have puzzled at all."
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| « Last Edit: Aug 8th, 2003, 4:39pm by wowbagger » |
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Elysha
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Re: Some Answers to Easy Section
« Reply #34 on: Aug 8th, 2003, 11:21pm » |
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Ah! But I wasn't registered yet when I posted. Thank you for your kind words. I'll be sticking around... these riddles are addictive.
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #35 on: Aug 9th, 2003, 8:36am » |
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The sig is of the UberPuzzler "Eric Yeh".
* This post is absolutely senseless but hey look out for my "post meter" it is inching towards 126 *
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wowbagger
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Re: Some Answers to Easy Section
« Reply #36 on: Aug 11th, 2003, 3:35am » |
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on Aug 9th, 2003, 8:36am, TenaliRaman wrote:| * This post is absolutely senseless but hey look out for my "post meter" it is inching towards 126 * |
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There are even more senseless posts...
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #37 on: Aug 11th, 2003, 10:41am » |
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LOL!!!! 
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Ziyaad
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Re: Some Answers to Easy Section - foot Size and s
« Reply #38 on: Aug 14th, 2003, 3:20am » |
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The correlation is correct because, As a person gets older, their foot size generally becomes larger. Of course, as one gets older, one's spelling ability generally also improves!!!
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #39 on: Aug 14th, 2003, 11:17am » |
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yeap!! it seemed the only answer to me too ! But when i searched the forum for the answer i found some really goofy discussion on this (as usual).it may not be enlightening but certainly entertaining .
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jtrook
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Re: Some Answers to Easy Section: Marble Jar1
« Reply #40 on: Sep 10th, 2003, 9:29am » |
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Answer to Marble Jar. I think from the reading of the question that each jar must have 50 marbles when you are finished. It says redistribute (e.g. swap a black with a white). The best probability is 50% if you don't swap any or if you even the jars with 25 black and 25 white. I would prefer the second which leave the choice in your hands not random selection of the jar.
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aero_guy
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Re: Some Answers to Easy Section
« Reply #41 on: Sep 10th, 2003, 12:24pm » |
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jtrook, I won't spoil it for you, but there is a better solution (just shy of 75% survival). There is a separate thread on the topic.
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jtrook
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Re: Some Answers to Easy Section
« Reply #42 on: Sep 10th, 2003, 2:41pm » |
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Thanks aero_guy,
I found the thread. I wasn't considering the two jars events together. I only looked at the 24.74% one jar and the 50% the other jar.
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #43 on: Sep 10th, 2003, 4:12pm » |
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*still feels he should have clicked "some others should,not this one*
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Icarus
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Re: Some Answers to Easy Section
« Reply #44 on: Sep 10th, 2003, 6:48pm » |
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It's nothing personal, TenaliRamen! I just think that they detract rather than advance the conversations, so I decided to see if this opinion was limited to me or if it was generally shared by those who have been around long enough to be aquainted with both single issue threads, and these in-mass ones. (Speaking of which, I'm restricting this to members only. Visitors who have been around that long really ought to register anyway! )
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| « Last Edit: Sep 10th, 2003, 6:49pm by Icarus » |
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otter
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Re: Some Answers to Easy Section
« Reply #45 on: Sep 10th, 2003, 7:22pm » |
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on Sep 10th, 2003, 6:48pm, Icarus wrote:
It's nothing personal, TenaliRamen! I just think that they detract rather than advance the conversations, so I decided to see if this opinion was limited to me or if it was generally shared by those who have been around long enough to be aquainted with both single issue threads, and these in-mass ones. (Speaking of which, I'm restricting this to members only. Visitors who have been around that long really ought to register anyway! ) |
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I have to agree, Icarus. I have come to view these "en-masse" responses as spoilers at best and "one-upsmanship" at worst. One of the things that keeps me coming back to this forum is the great discussion and the thought that goes into the posts. Many times I have learned much more from following the individual threads than I did from the riddle or puzzle itself. As William notes, "how you get to the answer is more important that the answer itself".
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| « Last Edit: Sep 10th, 2003, 7:23pm by otter » |
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We shall not cease from exploration. And the end of all our exploring will be to arrive where we started
and know the place for the first time.
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mistysakura
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Re: Some Answers to Easy Section
« Reply #46 on: Sep 11th, 2003, 2:13am » |
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My reason for voting "some others should, not this one" is becuase I feel that the "easy" section doesn't generate much conversation after the puzzle is solved anyway, whereas in medium/hard/what happened etc, there ae usually many continuations after the initial "solving" of the puzzle. some of them are extensions, and some are arguments against the answer. I think that "easy" is much more clear-cut than most other categories, so there' not much harm done in leaving this one. If these threads are kept in the harder forums though, it does lead away from the left-over conversation.
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TenaliRaman
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Re: Some Answers to Easy Section
« Reply #47 on: Sep 11th, 2003, 8:08am » |
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Icarus,
no probs!(which may slightly hint toward the fact that i share your viewpoint)
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Icarus_Bound
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Re: Some Answers to Easy Section
« Reply #48 on: Sep 11th, 2003, 7:10pm » |
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Some higher power must disagree, because as you can see by my lowly "guest" status, I am for some reason unable to log in. I've asked William, and he can find no problems at his end, and so far I have found nothing at mine.
So I guess your thread is safe from me until I can find a solution to a much more vexing puzzle!
Icarus
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towr
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Re: Some Answers to Easy Section
« Reply #49 on: Sep 11th, 2003, 11:48pm » |
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on Sep 11th, 2003, 7:10pm, Icarus_Bound wrote:| Some higher power must disagree, because as you can see by my lowly "guest" status, I am for some reason unable to log in. I've asked William, and he can find no problems at his end, and so far I have found nothing at mine. |
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Have you tried logging in from a different computer?
Deleting all your cookies?
Having William change your password?
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