LSAT的逻辑组题（二）a

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Time-35 minutes  
3 X7 j4 e6 H9 U24 Questions
' i. l% y) v3 WQuestions 1-6

Seven students-fourth-year students Kim and Lee; third-year students Pat  
7 A% t4 S# H) oand Robin: and second-year students Sandy, Tety and Val-and only those seven,  
7 ]; i$ i1 Z" x7 ^) [3 nare being assigned a rooms of equal size in a dormitory. Each room assigned  
" K4 q2 w- U. h5 Y: fmust have either one or two or three students assigned to it and will  
accordingly be called either a single or a double or a triple. The seven
students are assigned to moms in accordence with the following conditions:

7 E7 `) [  n8 Q! @( vLio fourth-year student can be assigned to a triple.

$ V0 K  |8 z; W1 L7 ?No second-year student can be assigned to a single.
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% l3 Q' [& E! e9 R$ M4 I8 Z1 uLee and Pobin must not share the same room  

( [* w0 O# i: c) g! f: s8 {1 kKim and Pat must share the same room.
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1. Which one of the following is a combination of rooms to which the seven  
* W' z$ ]) V2 k+ j6 Tstudents could be assigned?

(A) two triples and one single
) A  H* ]( n1 d2 j(B) one triple and four singles
3 m  @! W) n6 U* d/ v. `( r(C) three doubles and a stngle
7 H, Z& l6 K% D8 g! r: t; l- _(D) two doubles and three singles
, V4 E+ i; g: a; Q1 {& U- f+ d, M! g(E) one double and five singles

2. It the room assigned to Robin is a single, which one of the following could  
be true?

(A) There is exactly one double that has a second-year student assigned to it.
7 `& K0 X0 P, e  y% n(B) Lee is assigned to a stngle.
6 I8 w7 _+ ]& [3 d7 S" r(C) Sandy Fat and one other student are zseigned to a triple together.
0 k6 T' P1 _6 `: v. a# c(D) Lixactly three of the rooms assigned to the students are singles
(E) Exactly two of the rooms assigned to the students are doubles.

3. Which one of the following must be true?
  `! b6 k. v6 D; f* d; h$ }$ z
(A) Lee is assigned to a single
, K2 T2 P: U2 q& S& b- C(B) Pat sharts a double with another student
(C) Robin shares a double with another student
2 }6 L* y& l, ^; S(D) Two of the second-year students share a double with each other
(E) Neither of the third-year students is assigned to a single
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' ~+ G2 w/ B* H! O8 e9 Q* Z- m4 e4. If Robin is assigred to a triple, which one of the following must be true?

(A) Lee is assigned to a single
2 r6 e& `" Q2 g3 u+ V5 k' y  g& M(B) Two second-year students share a double with each other
(C) None of the rooms assigned to the students is a single
(D) Two of the rooms assigned to the students are singles.
(E) Three of the rooms assigned to the students are singles

2 U5 Y6 F5 V; \3 h0 N5. If Terry and Val assigned to different doubles from each other, other, then  
) U4 j* d6 n' k) c5 r; xit must be true of the students’ rooms that exactly
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(A) one is a single
. ]; _6 L# Q* Z: @5 W) n. U; }(B) two are singles
# B* T! ~' D* R  x" b; q, a0 |(C) two are doubles
1 R' P/ T0 t/ L; |" Y5 o; H6 b. {(D) one is a triple
5 B) x4 o' J7 s+ }; ~(E) two are triples  
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6. Which one of the following could be true?
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(A) The two fourth-year students are assigned to singles.
(B) The two fourth-year students share a double with cach other.
' `1 D; K# F0 X( t% V(C) Lee shares a room with a second-year student
- e% B3 L1 Z3 ~! P, v(D) Lee shares a room with a third-year student
(E) Pat shares a triple with two other students
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' ]/ D8 k) f+ |4 q% I/ gQuestions 7-11
4 Z* j' ~0 l( a& p' k9 c
A worker will insert colored light bulbs into a billboard equipped with  
0 T; l! l/ x/ |: I0 h  Bexactly three light sockets, which are labled lights 1, 2, and 3. The worker  
4 B. t) C) E( chas three green bulbs, three purple bulbs, and three yellow bulbs. Seiection of  
bulbs for the sockets is governed by the following conditions:

* ?) Z1 \0 J! G% |% D! w# D# RWhenever light 1 is purple, light 2 must be yellow.

4 \5 r5 m+ \9 W1 RWhenever light 2 is purple, light 1 must be green.

Whenever light 3 is either purple or yellow, light 2 must be purple.

7. Which one of the following could be an accurate list of the colors of light  
bulbs selected for lights 1, 2 and 3, respectively?

(A) green, green, yellow
/ b" O6 [* r4 c) e0 w(B) purple, green, green
(C) purple, purple, green
6 u, O( E- D" C; n9 {' _(D) yellow, purple, green
8 f0 z0 [6 H5 {! I(E) yellow, yellow, yellow

( P* g/ l% b8 J8 s% @8. If light 1 is yellow, then any of the following can be true, EXCEPT:
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(A) Light 2 is green.
(B) Light 2 is purple
(C) Light 3 is green
: P6 s# @/ J' ?(D) Light 3 is purple
8 C* }8 X7 A- G: h- E(E) Light 3 is yellow
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5 U8 t7 l3 `* U3 W! [; O9 P% \9. There is exactly one possible color sequence of the three lights if which
- d9 m/ E7 A5 T3 p: aone of the following is true?

(A) Light 1 is purple.
(B) Light 2 is purple.
(C) Light 2 is yellow
& X3 p# c% m: D: b0 @7 N. z(D) Light 3 is purple.
. N3 k5 O+ W, ], L(E) Light 3 is yellow
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# `. k* Z- m' i+ `" c10. If no green bulbs are selected, there are exactly how many possible  
- P# J. d. `9 u7 ydifferent color sequences of the three lights?

(A) one
(B) two  
  m* ]& G1 {; n* h: A$ T6 l(C) three
/ v& \7 ?( b8 u7 G(D) four
! H& V# F6 [! F7 W* ~(E) five
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11. If no two lights are assigned light bulbs that are the same color as each  
other, then which one of the following could be true?

4 B$ X( k& r% V; k$ j+ v(A) Light I is green, and light 2 is purple.
8 ^5 R1 |% A& }, v9 U(B) Light I is green, and light 2 is yellow.
1 D5 |2 U8 C) Y8 x(C) Light I is purple, and light 2 is yellow.
2 t. v( [% N. i- P7 t" T2 e8 d(D) Light I is yellow, and light 2 is green.
(E) Light I is yellow, and light 2 is purple.