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logic problems
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Smee



Joined: 24 Dec 2004
Location: Jeollanam-do

PostPosted: Sat Apr 01, 2006 8:18 am    Post subject: Reply with quote

George - Ulsan
Harold - Busan
Ivan - Daegu


I can't think of one, so Tomato can go again.
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Njord



Joined: 12 Jan 2006
Location: South Korea

PostPosted: Sat Apr 01, 2006 8:30 am    Post subject: Reply with quote

tomato wrote:
You gave me two hints, but I think I got it this time:

1. (C) 4
2. (A) 1
3. (A) 5
4. (A) 1
5. (A) A
6. impossible
7. (D) D
8. (B) 7

Now can I present my next puzzle?


Hmm... Now you have the wrong answer for question 1. (The next question with the same answer as this one.) Also, you must answer all questions (even if they are impossible). Anyone else care to try?
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Smee



Joined: 24 Dec 2004
Location: Jeollanam-do

PostPosted: Sat Apr 01, 2006 8:39 am    Post subject: Reply with quote

1. A
2. A
3. A
4. A
5. A
6. A
7. D
8. B
???
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huck



Joined: 19 Jan 2003

PostPosted: Sat Apr 01, 2006 9:11 am    Post subject: Reply with quote

old thoughts: Smile

(#2 can never be 'B' or 'C'.)

If 1 is A, then 2 = A , which negates number 1 because 1 doesn't equal C.

If 1 is B, that would make 3 = B, which would make 6=A. But 2 can never be B..That's an impossible answer.

So 1 has to equal C...

Finally, if 1 is D, then 5 is D. 2 can not be A,B or C because they negate either 1 or 2....But if 2 = D, then 1 is negated...

new thoughts: Cool

1. C (therefore 4=C....2/3 can't = C)
2. A (the first C is 1)
3.
4. C (therefore, there are 3 D's)
5. D (there are 3 D's - that's the most)
6. D (5 and 6 are the same)
7.
8.

We need another D, and it's obviously not #8. If 3 is A or C, then it changes 6, and then we really won't have enough D's. 3 has to equal D because it can't be 7 or 8. I think 3 = D, so then 8 = A, which would make 7 = B. But that's the wrong answer for 8.

So, I guess this is where the 8th question comes in....how many of these questions are possible, but if the questions negate each other, how do you know which ones to keep as possible answers?
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tomato



Joined: 31 Jan 2003
Location: I get so little foreign language experience, I must be in Koreatown, Los Angeles.

PostPosted: Sat Apr 01, 2006 9:35 am    Post subject: Reply with quote

How do you interpret number 6:
"The first question with the same answer as the question following it is:"?

Does that mean the same (A) (B) (C) (D) answer, or the same answer following the (A)(B)(C)(D)?

I interpreted it as the same answer following (A)(B)(C)(D).
I answered that this question was impossible, because the four choices were 2, 3, 4, and 5.
The choices for 2, 3, 4, 5, and 6 are, respectively, numbers 1-4, numbers 5-8, numbers 1-4, letters A-D, and 2-5.
Those are five mutually exclusive choices.
So none of those answers could be correct.
That's why I marked number 6 as impossible.
Since I saw it as impossible to get a right answer to all 8 questions, I marked 7 as the highest possible score.
Njord must have agreed with me, because he never corrected me for numbers 6 and 8.

Smee seems to think that it means the same (A)(B)(C)(D) answer.
In which case, number 1 is indeed (A) and number 8 is indeed (D).

By the way, Njord, did you make up this puzzle, or did you get it from somewhere else?


Last edited by tomato on Sat Apr 01, 2006 9:41 am; edited 1 time in total
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huck



Joined: 19 Jan 2003

PostPosted: Sat Apr 01, 2006 9:38 am    Post subject: Reply with quote

I think it means the first time an answer (A, B, C, D) repeats in sequential order....back-to back numbers...

and then choose the first question as your answer...if that makes sense.


[url]
http://www.mathpuzzle.com/20questions.htm[/url]

this seems to be similar, but it has 20 questions...i didn't try it yet...it's bedtime.
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tomato



Joined: 31 Jan 2003
Location: I get so little foreign language experience, I must be in Koreatown, Los Angeles.

PostPosted: Sat Apr 01, 2006 9:46 am    Post subject: Reply with quote

Njord, you corrected me for number 1 but not for number 2.
Are you sure?
How could number 1 be wrong and number 2 be right?
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tomato



Joined: 31 Jan 2003
Location: I get so little foreign language experience, I must be in Koreatown, Los Angeles.

PostPosted: Sat Apr 01, 2006 9:51 am    Post subject: Reply with quote

Smee, in your 4:18 PM post, you answered my 11:24 AM post correctly, but you left out something:
which foreign teacher was making a midnight run for which reason?
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huck



Joined: 19 Jan 2003

PostPosted: Sat Apr 01, 2006 6:48 pm    Post subject: Reply with quote

I was thinking that the questions that might be impossible are the ones that say "which letter has been used the least".....if A and B are both 1, then whichever answer you say will make it a lie, because then it'll have 2. Or the one saying, "the last question with the answer A is...." and if it's #2, then it's not a choice.

so, here is my final guess....the only one that is a lie is number #4, but #4 HAS to be "C"....it can't be anything else because #1 HAS to be 'C".

1. C (#4 is the next C)
2. A (#1 is the first C)
3. (the answer is #2 because question 2 is the last 'A', which isn't a choice)
4. C (this answer is a lie. there aren't any D's, which isn't a choice)
5. C (C occurs the most)
6. C (#4 is the first answer with the same answer following it)
7. B (B and D never appear).
8. C (the answers for #3 and #4 aren't among the choices, so there are only 6 right answers).


edit.....the correct answer is here... http://perplexus.info/show.php?pid=2664&op=sol

i don't like how you can choose which answer you want to miss. so, i'm offficially changing the correct answer to mine. Wink you can't choose which anwers you want to be wrong. answers are wrong because the correct choice isn't available.


Last edited by huck on Sat Apr 01, 2006 9:15 pm; edited 1 time in total
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midgic



Joined: 14 Feb 2004

PostPosted: Sat Apr 01, 2006 7:47 pm    Post subject: Reply with quote

my completely wrong answer deleted.....
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huck



Joined: 19 Jan 2003

PostPosted: Sun Apr 02, 2006 3:51 am    Post subject: Reply with quote

Quote:
eorge, Harold, and Ivan are all staging a midnight run.
They were employed in Busan, Daegu, and Ulsan, although not necessarily in that order.

Here is what our three down-trodden, long-suffering martyrs have been going through:

--One of the members is fed up with all those impudent little urchins yelling "�̱�����Դϴ�!"

--Anyone with common sense ought to know better than to use sweet corn as a pizza topping. If the second member of our trio gets one more pizza with corn on it, he will throw a conniption.

--Our third member asked his director quite nicely to change the light bulb in his bathroom. And would you believe, the director actually refused to make the special trip to his apartment!

Here are the hints:

1. Cross George/Busan, Harold/Daegu, and Ivan/Ulsan off.

2. The teacher employed in Busan doesn't know a word in Korean, so when those nasty little ��������'s laugh and point, he doesn't realize they're talking about him.

3. The foreign teachers in Ulsan have a powerful lobby in Ulsan. The City Council recently passed an ordinance setting a minimum wattage for all the light bulbs in all the foreign teachers' apartments. Moreover, they appointed a special police squad to make certain that this ordinance is strictly enforced.

4. Ivan knows at least two words in Korean. When he orders a pizza, he always remembers to say "������ ������." So Ivan and the pizza store get along just fine.

5. On Dave's ESL Cafe, the teacher in Ulsan has written messages flaming posters who don't like kids yelling "�̱�����Դϴ�!"

Match the names, the cities, and the grievances.



Ivan, living in Busan, can't understand Korean (except for ordering pizza).

Harold, living in Ulsan, had a bad lightbulb.

George living in Daegu, hates the pizza.
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huck



Joined: 19 Jan 2003

PostPosted: Sun Apr 02, 2006 3:53 am    Post subject: Reply with quote

Quote:
eorge, Harold, and Ivan are all staging a midnight run.
They were employed in Busan, Daegu, and Ulsan, although not necessarily in that order.

Here is what our three down-trodden, long-suffering martyrs have been going through:

--One of the members is fed up with all those impudent little urchins yelling "�̱�����Դϴ�!"

--Anyone with common sense ought to know better than to use sweet corn as a pizza topping. If the second member of our trio gets one more pizza with corn on it, he will throw a conniption.

--Our third member asked his director quite nicely to change the light bulb in his bathroom. And would you believe, the director actually refused to make the special trip to his apartment!

Here are the hints:

1. Cross George/Busan, Harold/Daegu, and Ivan/Ulsan off.

2. The teacher employed in Busan doesn't know a word in Korean, so when those nasty little ��������'s laugh and point, he doesn't realize they're talking about him.

3. The foreign teachers in Ulsan have a powerful lobby in Ulsan. The City Council recently passed an ordinance setting a minimum wattage for all the light bulbs in all the foreign teachers' apartments. Moreover, they appointed a special police squad to make certain that this ordinance is strictly enforced.

4. Ivan knows at least two words in Korean. When he orders a pizza, he always remembers to say "������ ������." So Ivan and the pizza store get along just fine.

5. On Dave's ESL Cafe, the teacher in Ulsan has written messages flaming posters who don't like kids yelling "�̱�����Դϴ�!"

Match the names, the cities, and the grievances.



Ivan, living in Busan, can't understand Korean (except for ordering pizza).

Harold, living in Ulsan, had a bad lightbulb.

George living in Daegu, hates the pizza.
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tomato



Joined: 31 Jan 2003
Location: I get so little foreign language experience, I must be in Koreatown, Los Angeles.

PostPosted: Sun Apr 02, 2006 5:20 am    Post subject: Reply with quote

Smee got the cities right and Huck got the grievances right.
Huck, you must have misunderstood the hints.
Hint #2 was supposed to render Busan and the kids on the street mutually exclusive.
Hint #3 was supposed to render Ulsan and the light bulb grievance mutually exclusive.
Hint #4 was supposed to render Ivan and Busan mutually exclusive.
If you correct that, you should get it right.

In other words, hints #1 and #4 should give you this.
I think you got hint #1:



Hints #2, 3, and 5 should give you this:



and hint #4 should give you this:

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huck



Joined: 19 Jan 2003

PostPosted: Sun Apr 02, 2006 6:03 am    Post subject: Reply with quote

ah...okay...i thought the guy couldn't understand the kids and so he got pissed at them......and i sped-read the part about the director and i thought he DID change the lightbulb...

Ivan/Daegu/hates the kiddies.

Harold/Busan/bad lightbulb

George/Ulsan/hates pizza.

I like these puzzles. Basically, these kinds of questions made up the whole logic section of the GRE test for graduate school.

like this Smile

An amusement park roller coaster includes five cars, numbered 1 through 5 from front to back. Each car accommodates up to two riders, seated side by side. Six people—Tom, Gwen, Laurie, Mark, Paul and Jack—are riding the coaster at the same time.

Rules

* Laurie is sharing a car.
* Mark is not sharing a car and is seated immediately behind an empty car.
* Tom is not sharing a car with either Gwen or Paul.
* Gwen is riding in either the third or fourth car.

Questions

1.
Which of the following groups of riders could occupy the second car?
.
(A) Laurie only
(B) Tom and Gwen
(C) Laurie and Mark
(D) Jack and Tom
(E) Jack, Gwen, and Paul
Answer �� Premise and Rules

2.
If Gwen is riding immediately behind Laurie's car and immediately ahead of Tom's car, all of the following must be true EXCEPT:
.
(A) Gwen is riding in the fourth car.
(B) Paul is riding in the third car.
(C) Tom is riding in the fifth car.
(D) Laurie is riding in the third car.
(E) The first car is empty.
Answer �� Premise and Rules

3.
Which one of the following statements CANNOT be true?
.
(A) Neither Tom nor Gwen is sharing a car with
........ another rider
(B) Neither Mark nor Jack is sharing a car with
........ another rider.
(C) Tom is sharing a car, and Jack is sharing a car.
(D) Gwen is sharing a car, and Paul is sharing a car.
(E) Tom is sharing a car, and Gwen is sharing a car.
Answer �� Premise and Rules

4.
If Paul is riding in the second car, how many different combinations of riders are possible for the third car?
.
(A) one
(B) two
(C) three
(D) four
(E) five
Answer �� Premise and Rules

5.
Assume that a seventh rider is riding with Jack in the first car, but that all other rules remain unchanged. Which of the following is a complete and accurate list of the riders who might be riding in the fifth car?
.
(A) Mark
(B) Gwen, Paul
(C) Tom, Laurie, Paul
(D) Tom, Laurie, Mark
(E) Tom, Paul, Laurie, Mark
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tomato



Joined: 31 Jan 2003
Location: I get so little foreign language experience, I must be in Koreatown, Los Angeles.

PostPosted: Sun Apr 02, 2006 6:45 am    Post subject: Reply with quote

John is a dismal failure as a teacher.
He has been on the job for only one day and already he is in trouble.
In one of his classes, he didn't want to spend the whole hour reciting the textbook, so he planned what he thought was an interesting class--with games, songs, and picture books.

But it didn't turn out that way.
The director called John into the office and gave him a good scolding.
"Parents are complaining! One parent says her child doesn't like to play games! Another parent says her child doesn't like to sing songs! Another parent says her child doesn't like to look at picture books! Why can't you please everybody all the time?"

John hasn't quite learned all the students' names, and he doesn't know which parent made which complaint. But he does know that the names are Judy, Kathy, and Laura, and that they wore red, yellow, and blue, although not necessarily in that order.

And he also knows this much:

1. Judy didn't wear red, Kathy didn't wear yellow, and Laura didn't wear blue.
2. Judy likes games, Kathy likes songs, and Laura likes picture books.
3. The girl who wore yellow doesn't like games.

Can you help John match the names, the colors, and the activities?
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