Q18

[ShehryarB30]

Could you pls explain this

[ohthatpatrick]

We would start analyzing each answer choice by looking over previous work to see if we'd ever had a scenario that matches the answer choice. If we do, we can eliminate that answer.

For this thread, we'll just create hypotheticals from scratch, if needed. But before we go plug and chug, we take a quick pass through the answers to see if anything jumps out as us as something that must be false.

(A) An FG chunk would either go on 1/2 or 2/3, since F/q can't ever be on 3. It seems doable to still isolate I from G. Defer.

(B) An FH chunk would be 1/2 or 2/3, since F/q can't go on 3. But if it went 1/2, then GI would be together in spots 3/4. So the FH chunk would have to go 2/3. But that seems fine. Defer.

(C) A GH chunk could go in 1/2, 2/3, or 3/4, it would seem. It would always be possible to separate G and I.

(D) An HF chunk would be 1/2 or 3/4, since F can't go on 3.
But in either of those scenarios, you'd be cramming G and I next to each other.

H F (G, I)
(G, I) H F

This answer must be false.

(E) An IH chunk could seemingly go 1/2, 2/3, or 3/4, and it would be easy to separate G from I.


If we'd needed to, we would have written more complete scenarios to prove some of those answers were possible and thus wrong. But since all these answers were giving us chunks, it was easier to do our normal thinking of "where can the chunk go"? We're only really limited in terms of the rules that F can't be 3rd and that G and I must be separated.


Hope this helps.