kiwistory
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PT23, S1, G3, Questions 12-18

by kiwistory Sun Jul 18, 2010 1:15 pm

Hi! I am having a bit of trouble on the researcher question.

Though I got the questions right, I feel that the method I chose to solve this problem was rather inefficient. I was wondering if there was a big deduction here that I missed? (Such as a certain individual must always be on a team, or two individuals must be on the same team at all times if both factors are played)

If there is a major deduction, was there any way I could have made this deduction just from studying the conditions given in the original prompt rather than via trial and error?
Are there any way I could have solved this problem with more ease than mainly trial and error method? (For example, q 14,15,16,17,18? Because for Q.14 The only answer I could eliminate off the bat was C, every other choice I had to plug and chug)
Also, is there a chapter in the Atlas Logic Games Strategy Guide that could help me with this type of problem?

Thank you so much, please let me know if my question was not clear!
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Re: PT23, S1, G3, Questions 12-18

by ManhattanPrepLSAT1 Mon Jul 19, 2010 2:05 am

I'm sorry to say that there's no fast way of doing this game. I've looked for a way to "frame" this game for years and have found that while plug and chug is tedious, it's actually the appropriate solution to this game.

I've attached a set up of the game board for this game, but there are no upfront inferences or major deductions that make this game any easier.

Sometimes you just have to fight your way through it!
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Re: PT23, S1, G3, Questions 12-18

by cyruswhittaker Thu Aug 19, 2010 5:30 pm

From the rules, this is what I've currently derived:

J1-->R2-->F2
R1-->J2-->F1 (due to that R can't be w/ M and one of the anthropologists must be selected per team)
M-->(N or O) (since M restricts both R and S from being with it)

I'm still having a hard time on the questions, particularly with #14-18.

I could laboriously crunch out the choices, but this would be rather futile on test day given that we only have less than 9 minutes per game.

So do you have any tips on the questions on how to speed this game up? Elimination methods? Inferences?

Thanks!
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Re: PT23, S1, G3, Questions 12-18

by ManhattanPrepLSAT1 Thu Aug 19, 2010 10:33 pm

Unfortunately, I think you have the big inferences. The key is to check who's left from each of the anthropologists and the linguists. The constraint that at least one of each team must include at least one anthropologist and at least one linguist is the most constraining element to this game.

I've always felt this game is one that can drain the clock. One thing that I think was expected on this set of games is that this game is more in the 10-12 minute range. In order to have those extra minutes you'd have to move very quickly on the other games, but unfortunately, the second game on this PT is also very time consuming. The only real easy game in the set of four is the first game.

So overall, I would say this was a challenging set of games.
 
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Re: PT23, S1, G3, Questions 12-18

by farhadshekib Wed Jul 06, 2011 12:41 pm

This is how I got through Q.14:

A, C and E were quick eliminations:

(A) - would force M + R in team 2 (remember: J1 -> R2; M also has to be there because there is at least 1 anthro per team).

(C) - violates N/R rule

(E) - has three linguists and no anthro on team 1.

Now, we are left with B and D. I realized that J has to be in at this point, as both A/C include J. This also means that R has to be in team 2.

So, Team 1: N, J, ?
Team 2: R, F, ?

Now, I simply choose one variable - S in this case - and I then tried to place it in team 1. It fit and I moved on.

Question 16) This could of been answered directly by the work I did on question 15.

Question 15 asks: what could be true If F + M are on the same team.

Well, if F + M are on the same team, they must be in team 1.

They cannot be together in team 2 because that would force J in team 1 (i.e. at least 1 anthropologist per team), putting R in team 2 (violation of the 3rd rule).

Question 16 asks: which one of the following pair of researchers cannot be together on team 2?

The correct answer is F + M. This was directly proven by question 15.

Question 17) asks: what could be true?

The correct answer is A: F is on team 1, and N is on team 2.

This could of been answered in less than 5 seconds by looking at the correct answer in the first question (#12), which shows that F can be on team 1, and N can be on team 2.

Question 18) asks: If M is on team 2, which one of the following must be on team 2?

M can't go with R and S, so that eliminates (D) and (E). M can't go with F, as evident in questions 15 and 16; thus we can eliminate (A).

Now we are left between J and O. If J is selected, it has to be in team 2 (putting J in 1 would force in R in 2, which is a big no-no).

So, lets try a scenario where J is not in:

Team 1: F, N O
Team 2: M, ? ?

Clearly, this doesn't work, so if M is 2, J is 2.
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Re: Diagram

by maryadkins Fri Jul 08, 2011 2:26 pm

Nicely done! Really impressed, too, with how you used previous work to move through the questions efficiently. Excellent job.