LSAT PrepTest 44 Section 3 Question 3 Explanation | Logic Games

I didn't write the following blog post. It was already on the blog when I took over the URL. The following blog post may contain mistakes. -Steve

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This Logic Games question is from the October 2004 LSAT.


We know that the second meeting is with F. So, let's start with a table and put the symbols (FMRST) into it, as always. I'll walk us through it a bit more than usual. F is second, and the F's cannot be consecutive (the rules say so), so we know they have to go in spots 2-4-7 or 2-5,-7. There are no other possibilities. Let's try 2-5-7 (the X's mean we don't know what goes in that spot yet):


1 | 2| 3 | 4 | 5 | 6| 7|
x | F| x | x | F | x| F|

T must go right after S, and M cannot be first (both according to the rules), and R is put in the remaining spot (spot 1). So:


1 | 2| 3 | 4 | 5 | 6| 7|
R | F |T |S| F | M| F|

Let's start eliminating some of the answer choices, now that we have a full diagram. Remember, since the question's asking for a "complete and accurate list," as many games questions do, if an answer choice leaves out someone that is in our correct diagram, we can eliminate that answer choice. S doesn't appear in choices B and D, so we can eliminate those. Now, let's try 2-4-7, so we can eliminate the other answer choices:


1 | 2| 3 | 4 | 5 | 6| 7|
x | F |x | F | x| x | F|

S must go right after T, M can't go first, and R must go in the remaining spot (spot 1), so:


1 | 2| 3 | 4 | 5 | 6| 7|
R | F|M| F |T| S | F|

We've now done the only 2 diagrams that are possible here. C doesn't mention F and S, so we can eliminate it. We can also eliminate A, because it includes R. We know R can't be in spot 4 because we've done both possible diagrams (the one with F's at 2-4-7 and 2-5-7) and it hasn't appeared. So choice E is correct.

Remember:

1) Make a diagram out of a table and put symbols into it. This one simple strategy will answer almost any games question. Aside from a extremely rare question here and there, no other sorts of diagrams are necessary.

2) When a question asks for a "complete and accurate list" of anything, and you have a correct diagram, if an answer choice doesn't include one of the possibilities in the diagram, the choice is wrong. After all, if the choice gave a complete list, it would include the possibility that your correct diagram has.