LG Game 2 Question 7 Explanation, by LSATHacks
This question asks how to force Mollie to be assigned to 1922. From our scenarios, only scenario 3 allows Mollie to be placed. Here’s that scenario:
Let’s think about how to force Molly to be second. We need to meet two conditions:
- It must be something that, in that diagram, would force Molly to 2nd
- It must be something that can’t occur in another diagram. (Because in those other scenarios, M isn’t second)
The second bit is less obvious. Don’t worry, I’ll explain below.
In the diagram above, either O or Y in 1st would force M 2nd. So it seems like either could be the right answer.
But, the diagram above is only scenario 3. In scenarios 1 and 2, O is also first. And in those scenarios, M is not second. So, placing O first doesn’t force M to be second, in all scenarios.
Therefore, E is CORRECT. Placing Y 1st forces M to be second. (And this is the only scenario where Y can go first.)
If you hadn’t diagrammed the three scenarios out in the initial run, how would you solve this question? I missed the different scenarios right off the bat, so I’m wondering if this would’ve been solvable otherwise, and if so how that would be done. Thanks!