逻辑推理题目做起来似乎很麻烦，因为有一大堆的逻辑。本文为您介绍图形解法。
线性逻辑问题是队列问题的一种特例,它在前面的队列问题 上加上线性限制,在上题中,LSAT逻辑推理题目的图形解法4:次序问题之二限制条件只是元素的先后次序问题, 在本题中,条件加上对队列中某些元素和某些固定位子的关系,所以我们在 LSAT逻辑推理题目的图形解法 4 中的图形上也加上相应的改变。 来看本题。
Problem:
A film producer id arranging for a series of actor to appear during an awards show. The actore F, G, H, I, J and K, will fill six time slots during the show, and their appearance are sunject to the following constraints;
A) F will go after I
B) I wll not scheduled for time slot 2
C) H will be in time slot that is immediately after G
D) K will appear in a time slot that is two slot after H
我们用图形表示出上面条件如下。
注意条件D) K will appear in a time slot that is two slot after H, is two slot after H, 表示K和H之间只空一格。 而不是空两格。
将C,D 条件合并:
Fig。1
这是最主要的限制条件。
Q1. In how many different time slot is it possible for J to appear?
A) two
B) three
C) four
D) five
E) Six
只有 Fig。1 影响这个问题, 我们看到 占4格, 只是相互之间的限制, 它们可以在 1-6 之间有两格的移动, 就是说, 两头的 1,2, 5,6 ,GH和 K 之间的空位取 3,4,5 相应的位置, 所以J 可以取的位子是 1,2,3,4,5,6, 共有6种, 答案是 E) Six。
Q2. if G is scheduled in slot 3, then who of the following must be scheduled in slot 5?
A) F
B) H
C) I
D) J
E) K
这表明 限制必须开始在第三格:
只有1,2 和 5 位子可选, 而 F 必须在 I 前, I 又不能在 2, 所以 I必须 在 第 5 格。 答案是 C) I。
Q3. which Actors CANNOT not be scheduled at time slot 3?
A) I and K
B) F amd J
C) J and H
D) F and G
E) K and F
From constraints Fig1, K at least can be as early as slot 4, so that answer is A) I and K
,we do not even need to look at where I could be, because there is only one rightr answer.
