can someone help explain #16? just tell me in a sentence, I dont need a big explanation. I dont understand what I'm not seeing.
thanks!
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- rachael.swetnam
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- noah
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Atticus Finch
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Re: PT36, S4, G3 Guiterrez, Hoffman, Imamura...
What an insane question. It would drive me to med school. I literally have never spent so much time thinking about a forum response, and it's only because I overlooked a work in the first rule. Arghh.
My first piece of advice is about how to study. With this question, you should have worked out all the reasons why (D) must be true by testing out all the other possibilities (and you'd see that K must be in row 1).
So, let's talk about how to arrive at the answer under pressure. If you're stuck, you could write out a valid scenario, draw circles to indicate any pieces which could switch places, and with that info try to eliminate as many as possible. But, that's not ideal an approach since you probably would be left having to do a second scenario.
Here's a bit more nuanced approach:
If M is in row 1, which rules are triggered?
- We can't have I in front of M, so we can't have GK.
- We can't have M in the 3rd row, so we can't have K in the window seat.
Since we see a bunch about K, consider where it might go. We know it has to go in an aisle seat.
Can it go in aisle 3? Where would we put the GH chunk? (Always consider the chunks!). It would have to go in aisle 1 and 2 (since GH must be in an aisle). But with K in the 3rd row, we'd need to put I in the first, and row 1 is full with MG. Nope!
Can it go in aisle 2? Where would the GH chunk go then? Nope!
K must go in aisle 1!
Phew!
My first piece of advice is about how to study. With this question, you should have worked out all the reasons why (D) must be true by testing out all the other possibilities (and you'd see that K must be in row 1).
So, let's talk about how to arrive at the answer under pressure. If you're stuck, you could write out a valid scenario, draw circles to indicate any pieces which could switch places, and with that info try to eliminate as many as possible. But, that's not ideal an approach since you probably would be left having to do a second scenario.
Here's a bit more nuanced approach:
If M is in row 1, which rules are triggered?
- We can't have I in front of M, so we can't have GK.
- We can't have M in the 3rd row, so we can't have K in the window seat.
Since we see a bunch about K, consider where it might go. We know it has to go in an aisle seat.
Can it go in aisle 3? Where would we put the GH chunk? (Always consider the chunks!). It would have to go in aisle 1 and 2 (since GH must be in an aisle). But with K in the 3rd row, we'd need to put I in the first, and row 1 is full with MG. Nope!
Can it go in aisle 2? Where would the GH chunk go then? Nope!
K must go in aisle 1!
Phew!
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- BHofkin
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Vinny Gambini
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Re: Q16
Like the other questions in this game, I found this one to be manageable with frames:
"”G "”"”
"”H "”G
"”"” "”H
The contrapositive of the fourth constraint starts us off; that is, if M is in row 1 (NOT row 3), K has to occupy an aisle seat. Conveniently, there's only one aisle seat left in each frame, allowing us to place both K and therefore M:
MG MK
"”H "”G
"”K "”H
The frame on the left is impossible, however, because K's being in row 3 would require I's being in row 1"”and there's no room for I in row 1. So we're left with the righthand frame, and both remaining people can go in either open slot.
"”G "”"”
"”H "”G
"”"” "”H
The contrapositive of the fourth constraint starts us off; that is, if M is in row 1 (NOT row 3), K has to occupy an aisle seat. Conveniently, there's only one aisle seat left in each frame, allowing us to place both K and therefore M:
MG MK
"”H "”G
"”K "”H
The frame on the left is impossible, however, because K's being in row 3 would require I's being in row 1"”and there's no room for I in row 1. So we're left with the righthand frame, and both remaining people can go in either open slot.
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