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LAST指导:逻辑推理题目的图形解法(7)

2009-05-11 
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。
   在上节中,LSAT逻辑推理题目的图形解法 5, 线性逻辑, 我们熟悉了队列的线性问题, 现在我们再来看一个更复杂一点的类似问题。
    A camper counselor is holding yetherball practice for seven camper named F, G, H, I ,J K, L throughout this week starting from monday. each camper practiceonly once and only one camper will practice per day.
    A) F, and J will practice on either Tuesday or Satuready.
    B) H will practice day after F
    C) L will not practice either the day before or the day after F or J practice
    D) K will not prctice on the day immediately following the day that J practice
    We still use the similar diagram we used at LSAT逻辑推理题目的图形解法 5, 线性逻辑, for keeping the consistency.
    我们用 X 在线下表示 No。 条件 C 相当与:
    即 L 只能在 4,。
    Q1. if J prctice before L, then who will practice on Sunday?
    A) L
    B) G
    C) H
    D) I
    E) K
    从条件 C 知道 L 只能在 4, 而J prctice before L, 则 F 只能在 6, from B, 那就是 H 在 Sunday, 所以 答案是 C) H 。
    Q2, if K practice at Friday, then whi will practice on Thursday>
    A) K
    B) G
    C) I
    D) L
    E)H
    我们已经知道, L 只能在 4 ,所以这个条件是多余的, 不要怀疑自己,答案是 D) L . 所以开始的推导必须要认真, 把题目看清楚。
    Q3 Who of following who CANNOT practice on Monday orTuesday?
    A) I
    B) H
    C) F
    D) K
    E)G
    From the constrain B) H will practice day after F, 答案是 B) H.
    Q4。 If G and H practice before J, then who will practice on Sunday?
    A) I
    B) L
    C) K
    D) F
    E)G
    If G and H practice before J, so that theymust practie before Saturday, rule out G and H, F, J, and L, so only K could practice on Sunday, and K could not follow J who may be on Saturday, answer is A) I.
    Q5, if K practice third, then we know which days that how many people practice, including Kelly?
    A) 2
    B) 3
    C) 4
    D) 5
    E)5
    这句英语的意思是在K第三个出场, 也就是 在周三play 的条件下,有几个人的schedule?是确定的? K 不能 follow J,所以周二只能是 F play, so 我们知道 F, K, L, J的 schedule,
    answer isC) 4
    Q6, if G practice before J and J practice before L , then who will practice on Friday?
    A) J
    B) G
    C) K
    D) I
    E)F
    From the constrains , we have above diagram, only K and I left for , and 5, but K can not follow J on 3, so that K has to practice at Friday, answer is C) K.
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