June 2007 LSAT Section 1 - Logic Game 3

0:05

Moving on to question 14. If Freedom makes a voyage to Guadalupe in week 1 and

0:11

a voyage to Jamaica in week 5 which one of the following must be true. Alright so were looking

0:17

at a situation where we have Guadaloupe in week 1 and Jamaica in week 5. We don't

0:24

have that in any of our previous work so let's draw out a new hypothetical here. And it's telling us

0:30

now that we have Guadaloupe in week 1 and Jamaica in week 5. Alright, well we know that if

0:37

Jamaica appears any week preceding Jamaica must be Guadaloupe. So, that tells week 4 must be Guadaloupe. Now

0:46

we need to have our Martinique block appear. And you notice we can't have our

0:53

two Martiniques go consecutively in 2 & 3 because of the 5th condition and the 3rd condition

0:59

that says there must be at least one G in between them so our only two

1:03

possibilities are 2 & 6 or 3 & 6. So, you notice in both of those scenarios what is in common?

1:09

Martinique must be in 6. Now again we know Guadalupe cant be in 2 or 3 because we can't have

1:18

consecutive destinations in the same place. We also know now that because we

1:26

can't have Guadaloupe in week 2 we can't have Jamaica in week 3.So, the only possibilities for

1:33

week 3 are Martinique and Trinidad. Again, for week 2 we could have Martinique, Trinidad or

1:43

Jamaica. So now which of the following must be true?

1:46

(A) Freedom makes a voyage to Jamaica in week 2. Again we just said that we can have Martinique

1:50

Trinidad or Jamaica in week 2. So (A) is not necessarily true so (A) would be

1:55

eliminated. Again one counter example will disprove a must be true question. OK because if

2:01

it must be true it always must be the case. (B) Freedom makes a voyage to Trinidad in

2:08

week 2. Again we don't know.

2:10

It's possible that it's Jamaica it's possible that it's Martinique.

2:14

(C) Freedom makes a voyage to Martinique in week 3.

2:17

Again possible but doesn't have to be true. It could be Trinidad. So, (C) is out. (D)

2:25

Freedom makes a voyage to Guadaloupe in week 6. That is not even possible. We know week

2:30

6 must be Martinique. Low and behold answer choice (E) Freedom makes a voyage to Martinique

2:37

in week 6. That must be true as we concluded because the only two possibilities for

2:43

our Martinique block were 2-6 or 3-6 and again

2:48

6 is in common in both of those scenarios. So (E) here must be true and (E) would be the correct

2:54

answer.

June 2007 - Sec 1 - Game 3 - Q14

Video Transcript: