LSAT Logic Games : Determining sequence in linear games
Study concepts, example questions & explanations for LSAT Logic Games
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Example Questions
Example Question #161 : Sequencing
Marisa eats dinner at the restaurant Fine Dinerz a total of eight times. At each of her eight dinners she meets exactly one of five friends: Caldwell, Derek, Emily, Freddy, and Guinevere. She meets each of the friends at least once. The order in which Marisa’s friends meet her at Fine Dinerz is governed by the following constraints:
She is never met by the same friend twice in a row.
Caldwell meets her at least twice.
When she meets Emily, she does not meet Derek immediately afterward.
Freddy is neither the first nor the last person she meets.
Each time she meets Derek, she meets either Caldwell or Freddy immediately afterward.
If Marisa meets Caldwell four times, then each of the following could be true EXCEPT:
Marisa meets Emily sixth and Freddy seventh.
Marisa meets Emily fourth and Guinevere fifth.
Marisa meets Caldwell third and Derek fourth.
Marisa meets Freddy fourth and Derek fifth.
Marisa meets Derek third and Freddy fourth.
Marisa meets Derek third and Freddy fourth.
If Marisa meets two persons other than Caldwell third and fourth, there are not enough spots to meet Caldwell four times without breaking the condition that she is never met by the same friend twice in a row. That restriction does not apply if she meets such persons fourth and fifth, or sixth and seventh, because she can meet Caldwell first, third, sixth, and eighth, or first, third, fifth, and eighth.
Example Question #162 : Sequencing
Marisa eats dinner at the restaurant Fine Dinerz a total of eight times. At each of her eight dinners she meets exactly one of five friends: Caldwell, Derek, Emily, Freddy, and Guinevere. She meets each of the friends at least once. The order in which Marisa’s friends meet her at Fine Dinerz is governed by the following constraints:
She is never met by the same friend twice in a row.
Caldwell meets her at least twice.
When she meets Emily, she does not meet Derek immediately afterward.
Freddy is neither the first nor the last person she meets.
Each time she meets Derek, she meets either Caldwell or Freddy immediately afterward.
If the first four people Marisa meets are Caldwell, Freddy, Guinevere, and Emily, in that order, then which one of the following must be true?
Marisa meets Caldwell fifth.
Marisa does not meet Derek twice.
Marisa does not meet Freddy twice.
Marisa does not meet Guinevere sixth.
Marisa meets Emily at least once more.
Marisa does not meet Derek twice.
With Emily met fourth, Derek cannot be met fifth. Therefore, to meet Derek twice, Derek would need to be met sixth and eighth, since he cannot be met consecutively. But since Derek always must be followed by either Caldwell or Freddy, he cannot be met eighth. Therefore, Marisa cannot meet Derek twice under these circumstances.
Example Question #163 : Determining Sequence In Linear Games
Seven children – Ann, Ben, Carter, Daisy, Ernie, Fred, and Gladys –are to be seated in a circle to play a game at school. There are exactly seven spots, numbered 1 through 7, with one child sitting in each spot. Because the seats are in a circle, spot 1 is next to both spot 7 and spot 2, and each child will sit next to two other children. The following conditions apply to the seating arrangement:
Carter and Daisy will not sit next to each other.
Fred will sit next to either Ernie or Gladys, but not both.
Gladys will sit exactly two seats away from Ben.
If Carter sits next to Fred, Gladys sits next to Daisy.
Which one of the following seating arrangements, listed from spots 1 to 7, could be the order in which the children sit?
Ann, Ben, Carter, Ernie, Daisy, Gladys, Fred
Ben, Carter, Gladys, Fred, Ernie, Daisy, Ann
Ann, Ben, Fred, Gladys, Daisy, Ernie, Carter
Ann, Carter, Daisy, Ben, Fred, Gladys, Ernie
Ann, Carter, Fred, Gladys, Ernie, Ben, Daisy
Ann, Ben, Fred, Gladys, Daisy, Ernie, Carter
The correct answer choice is the only one that does not violate one or more conditions. The other answer choices have Carter and Daisy sitting together, Fred sitting next to both Ernie and Gladys, Gladys not sitting two seats from Ben, and/or Gladys not sitting next to Daisy when Carter sits next to Fred.
Example Question #161 : Determining Sequence In Linear Games
Seven children – Ann, Ben, Carter, Daisy, Ernie, Fred, and Gladys –are to be seated in a circle to play a game at school. There are exactly seven spots, numbered 1 through 7, with one child sitting in each spot. Because the seats are in a circle, spot 1 is next to both spot 7 and spot 2, and each child will sit next to two other children. The following conditions apply to the seating arrangement:
Carter and Daisy will not sit next to each other.
Fred will sit next to either Ernie or Gladys, but not both.
Gladys will sit exactly two seats away from Ben.
If Carter sits next to Fred, Gladys sits next to Daisy.
If Ernie and Fred do NOT sit next to each other, what is the total number of children any two of whom could sit next to Gladys?
Five
Six
Three
Four
Two
Five
If Ernie does not sit next to Fred, Gladys must sit next to Fred. The question, then, is who can sit next to Gladys on the other side? It cannot be Ben, since Ben must sit two spots from Gladys. However, any of the other children can sit next to Gladys without necessarily violating any conditions. Therefore, five is the correct answer (which includes Fred).
Example Question #162 : Determining Sequence In Linear Games
Seven children – Ann, Ben, Carter, Daisy, Ernie, Fred, and Gladys –are to be seated in a circle to play a game at school. There are exactly seven spots, numbered 1 through 7, with one child sitting in each spot. Because the seats are in a circle, spot 1 is next to both spot 7 and spot 2, and each child will sit next to two other children. The following conditions apply to the seating arrangement:
Carter and Daisy will not sit next to each other.
Fred will sit next to either Ernie or Gladys, but not both.
Gladys will sit exactly two seats away from Ben.
If Carter sits next to Fred, Gladys sits next to Daisy.
If Ann and Fred sit next to each other, then Ernie CANNOT sit directly between:
Ann and Daisy
Ben and Daisy
Fred and Gladys
Ann and Ben
Ben and Fred
Ann and Ben
If Ernie sits next to Ann, then Gladys must sit next to Fred (since Ann is next to Fred). Ben would then need to be two spots from Gladys in the other direction. This leaves only Carter and Daisy to sit next to Ernie. Ernie cannot sit next to both Ann and Ben under these circumstances.
Example Question #163 : Determining Sequence In Linear Games
Six fast-food restaurants at a food court are assigned to numbered lots---1 through 6---that are arranged in that order (i.e., lot 1 is on the far left and lot 6 is on the far right). The restaurants are A, B, C, D, E, and F. The following arrangement characterizes how these restaurants are situated in the food court:
A and B have one restaurant between them, which is to say, they are assigned to lots that are separated from each other by exactly one other lot.
A and D are not situated next to each other.
D is located in a higher-number lot than C.
F is in lot 3.
Which one of the following must be true with respect to restaurant A?
A must occupy a slot that precedes the slot occupied by B.
A and D must be in juxtaposition.
A cannot occupy slots 1 or 6.
A cannot occupy slot 5.
A must occupy slot 2, if it does not occupy slot 4.
A cannot occupy slot 5.
A cannot occupy slot 5 because situating it there precludes placing B in a slot that is just one removed from A, as required by one of the rules.
Example Question #164 : Lsat Logic Games
A physician will be seeing on consecutive days nine patients with a particular kind of skin disorder: Ben, Claire, Drake, Ella, Flo, Guy, Hal, Ilene, and Jen. With the exception of the first two conditions listed below relating to Flo, Ilene, Claire, and Guy, only one patient with this skin disorder sees the physician on a particular day.
Flo and Ilene see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
Claire and Guy see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
The other conditions that apply are as follows:
Ella will be seen before Ben.
Hal will be seen before Drake.
Drake will be seen after Ilene but before Ella.
Guy will be seen after Jen and Ben.
Ben will be seen before Jen.
Who will be the last two patients the physician sees?
Ella and Jen
Ben and Claire
Ben and Guy
Jen and Ben
Guy and Claire
Guy and Claire
This problem relies exclusively on deducing the relative positions of the patients. The first insight to glean is that the patients will be seeing the physician over the span of seven days (four patients see the physician in two days and the rest see the physician over the course of five days---see the first two rules).
The sequence in which the patients will be seen can be deduced with near certitude:
H and IF (Ilene and Flo together) come before all others, but their order is undetermined.
Thereafter the sequence is as follows: D E B J GC (Guy and Claire together).
We need to combine the rules to derive this sequence. For example, one rule specifies that E comes before B. We can combine that rule with the rule that B comes before G, leading us to the sequence E B G; and since G and C go together, we get E B GC. Furthermore, since J comes before G but after B, we get E B J GC. Because D comes before E, we get D E B J GC. We also have a rule about D---namely, that it comes between I and E, so that leads to this: I D E B J GC. F and I are together, so we add F into the sequence. The only thing we can't determine for sure is the relative position of H and FI.
With this sequence down, we can readily see that GC must come last, and that is our answer.
Example Question #164 : Determining Sequence In Linear Games
A physician will be seeing on consecutive days nine patients with a particular kind of skin disorder: Ben, Claire, Drake, Ella, Flo, Guy, Hal, Ilene, and Jen. With the exception of the first two conditions listed below relating to Flo, Ilene, Claire, and Guy, only one patient with this skin disorder sees the physician on a particular day.
Flo and Ilene see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
Claire and Guy see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
The other conditions that apply are as follows:
Ella will be seen before Ben.
Hal will be seen before Drake.
Drake will be seen after Ilene but before Ella.
Guy will be seen after Jen and Ben.
Ben will be seen before Jen.
How many patients will be seen before Jen gets to see the physician?
3
5
6
2
4
6
We derive the following sequence when analyzing the rules and restrictions:
H/FI (over the first two days) D E B J GC
So Jen must await the physician seeing six patients before she gets in to see the physician (namely, H, F, I, D, E, and B).
Example Question #165 : Determining Sequence In Linear Games
A physician will be seeing on consecutive days nine patients with a particular kind of skin disorder: Ben, Claire, Drake, Ella, Flo, Guy, Hal, Ilene, and Jen. With the exception of the first two conditions listed below relating to Flo, Ilene, Claire, and Guy, only one patient with this skin disorder sees the physician on a particular day.
Flo and Ilene see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
Claire and Guy see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
The other conditions that apply are as follows:
Ella will be seen before Ben.
Hal will be seen before Drake.
Drake will be seen after Ilene but before Ella.
Guy will be seen after Jen and Ben.
Ben will be seen before Jen.
Who will be seen on the fourth day?
Ben
Jen
Ilene
Ella
Guy
Ella
H and FI will be seen on the first two days, in either order. D will be seen on the third day and Ella will be seen on the fourth day. So Ella is the answer.
Example Question #170 : Determining Sequence In Linear Games
A physician will be seeing on consecutive days nine patients with a particular kind of skin disorder: Ben, Claire, Drake, Ella, Flo, Guy, Hal, Ilene, and Jen. With the exception of the first two conditions listed below relating to Flo, Ilene, Claire, and Guy, only one patient with this skin disorder sees the physician on a particular day.
Flo and Ilene see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
Claire and Guy see the physician on the same day as each other and no other patient with this skin disorder sees the physician on that day.
The other conditions that apply are as follows:
Ella will be seen before Ben.
Hal will be seen before Drake.
Drake will be seen after Ilene but before Ella.
Guy will be seen after Jen and Ben.
Ben will be seen before Jen.
Which of the following must be true?
Hal and Flo will be the first two patients to be seen
Either Hal is the first patient to be seen or Flo and Ilene are the first two patients to be seen.
Hal will be the first patient to be seen
Drake will be the first patient to be seen
Flo and Ilen will be the first two patients to be seen
Either Hal is the first patient to be seen or Flo and Ilene are the first two patients to be seen.
A fully deduced sequence provides the clear answer: either Hal will be seen first or Flo and Ilene together will be seen first. Our sequence establishes the other patients in a definitive order, but the sequencing of H, F, and I remains undetermined, other than the fact that those three are the first ones in line, ahead of all the others.
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