lsat june 1996 - section 1, question 5

[cornofstarchy]

Hi, I need some help with this one. Here's the question:

 

ADMIN EDIT: QUESTION DELETED. PLEASE DO NOT POST LSAC LSAT QUESTIONS.

 

I've tried it and I keep getting A, B, C, D are true but E is false. The answer key says that D is the correct answer. Can anyone explain to me why? Or is the question worded incorrectly? Should it say, "Which one of the following must be FALSE?" Cause that would make E true... :doh:

 

Oh yea, here are my "solutions"...

 

A)

G,H,J,Q,R,F

H,G,J,Q,R,F

 

B)

G,H,J,Q,R,F

J,G,H,Q,R,F

 

C)

H,G,J,Q,R,F

G,J,H,Q,R,F

 

D)

G,H,J,Q,R,F

G,J,H,Q,R,F

 

E)

Can't because it must end as Q,R,F to fulfill the restriction that R comes immediately before F. Q must always be on day 4.

[cornofstarchy]

Nevermind, I figured it out and here's the answer in case anyone needs it:

 

Solution:

The correct answer is D. To get the answer, simply negate the selection. We know that Q,R,F must be on days 4,5,6 respectively. Choice D says that either H or J is scheduled for day 3. So, if neither J or H is scheduled for day 3, then it should fail.

 

ex) J,H,G,Q,R,F

 

This fails because if G is scheduled for day 3, then Q must be scheduled for day 5. As you can see, Q is not scheduled for day 5. Therefore, D is the correct answer because we cannot put J or H on a day that's not day 3.

[rakovsky]

SETUP:

6 days, 1 factory per day, F, G, H, J, Q, R

 

F= 1 or 6

J...Q

QRF

G=3 --> Q=5 therefore Q=/=5 --> G=/=3

 

Choice A.

J G H Q R F works so A might not be true.

 

Choice B.

H G J Q R F works so B might not be true.

 

Choice C.

G H J Q R F works so C might not be true.

 

Choice D.

 

QRF must be last, and G can't be third. So either H or J must be scheduled for day 3.

 

Answer= Choice D

 

I find that I spend significant amounts of time on the choices leading up to the right answer. In the case above, the right answer was easy for me to see. Is there a way that I can usually look ahead and spot the right answer quickly, or is it a waste of time because it is not so easy?

[cornofstarchy]

Sorry. The more you do, the faster you'll get. That's all there really is to it, I'm afraid. :(

[krusta80]

What's the average time alotted per question on the LSAT?

[larbgai]

cornofstarchy-

While your answer is right, I don't think your logic is correct.

 

You said that "Therefore, D is the correct answer because we cannot put J or H on a day that's not day 3."

 

That isn't true. We can't put G on day 3, so day 3 must be J or H.

 

 

We can determine that the sequence is XXXQRF.

 

Then, we recognize that since Q is not in position 5, G cannot be in position 3. So J/H must be in position 3. This is why the answer is D........

 

But if we put J on day 3, we can put H on day 1 or 2, and vice versa.