# June 2007 - Sec 1 - Game 3 - Q14

## Video Transcript:

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Moving on to question 14. If Freedom makes a voyage to Guadalupe in week 1 and
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a voyage to Jamaica in week 5 which one of the following must be true. Alright so were looking
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at a situation where we have Guadaloupe in week 1 and Jamaica in week 5. We don't
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have that in any of our previous work so let's draw out a new hypothetical here. And it's telling us
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now that we have Guadaloupe in week 1 and Jamaica in week 5. Alright, well we know that if
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Jamaica appears any week preceding Jamaica must be Guadaloupe. So, that tells week 4 must be Guadaloupe. Now
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we need to have our Martinique block appear. And you notice we can't have our
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two Martiniques go consecutively in 2 & 3 because of the 5th condition and the 3rd condition
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that says there must be at least one G in between them so our only two
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possibilities are 2 & 6 or 3 & 6. So, you notice in both of those scenarios what is in common?
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Martinique must be in 6. Now again we know Guadalupe cant be in 2 or 3 because we can't have
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consecutive destinations in the same place. We also know now that because we
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can't have Guadaloupe in week 2 we can't have Jamaica in week 3.So, the only possibilities for
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week 3 are Martinique and Trinidad. Again, for week 2 we could have Martinique, Trinidad or
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Jamaica. So now which of the following must be true?
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(A) Freedom makes a voyage to Jamaica in week 2. Again we just said that we can have Martinique
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Trinidad or Jamaica in week 2. So (A) is not necessarily true so (A) would be
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eliminated. Again one counter example will disprove a must be true question. OK because if
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it must be true it always must be the case. (B) Freedom makes a voyage to Trinidad in
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week 2. Again we don't know.
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It's possible that it's Jamaica it's possible that it's Martinique.
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(C) Freedom makes a voyage to Martinique in week 3.
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Again possible but doesn't have to be true. It could be Trinidad. So, (C) is out. (D)
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Freedom makes a voyage to Guadaloupe in week 6. That is not even possible. We know week
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6 must be Martinique. Low and behold answer choice (E) Freedom makes a voyage to Martinique
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in week 6. That must be true as we concluded because the only two possibilities for
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our Martinique block were 2-6 or 3-6 and again
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6 is in common in both of those scenarios. So (E) here must be true and (E) would be the correct
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