    GRE网络课堂学习笔记-逻辑

第二讲 分组题

1. Questions 1-6

Exactly eight consumers-F, G, H, J ,K, L, M, and N-will be interviewed by market researchers. The eight will be divided into exactly two 4-person groups-group 1 and group 2-before interviews begin. Each person is assigned to exactly one of the two groups according to the following conditions:
F must be in the same group as J.
G must be in a different group from M.
If H is in group 1, then L must be in group 1.
If N is in group 2, then G must be in group 1.

(1). Group 1 could consist of
(A) F, G, H, and J
(B) F, H, L, and M
(C) F, J, K, and L
(D) G, H, L, and N
(E) G, K, M, and N

(2). If K is in the same group as N, which one of the following must be true?
(A) G is in group 1.
(B) H is in group 2.
(C) J is in group 1.
(D) K is in group 2.
(E) M is in group 1.

(3). If F is in the same group as H, which one of the following must be true?
(A) G is in group 2.
(B) J is in group 1.
(C) K is in group 1.
(D) L is in group 2.
(E) M is in group 2.

(4). If L and M are in group 2, then a person who could be assigned either to group 1 or, alternatively, to group 2 is
(A) F
(B) G
(C) H
(D) J
(E) K

(5). Each of the following is a pair of people who could be in group 1 together EXCEPT
(A) F and G
(B) F and H
(C) F and L
(D) H and G
(E) H and N

(6). If L is in group 2, then each of the following is a pair of people who could be in group 1 together EXCEPT
(A) F and M
(B) G and N
(C) J and N
(D) K and M
(E) M and N

KEYS: DBCEBD

2. Questions 7-11

Five children-F, G, H, J, and K-and four adults-Q, R, S and T-are planning a canoeing trip. The canoeists will be divided into three groups-groups 1, 2, and 3-of three canoeists each, according to the following conditions:
There must be at least one adult in each group.
F must be in the same group as J.
G cannot be in the same group as T.
H cannot be in the same group as R.
Neither H nor T can be in group 2.

(7). If F is in group 1, which one of the following could be true?
(A) G and K are in group 3.
(B) G and R are I group 3.
(C) J and S are I group 2.
(D) K and R are in group 1.
(E) Q and S are in group 2.

(8). If F and S are in group 3, which one of the following must be true?
(A) G is in group 2.
(B) H is in group 3.
(C) K is in group 1.
(D) Q is in group 2.

(E) R is in group 1.

(9). If G and K are in group3, which one of the following must be true?
(A) H is in group 3.
(B) J is in group 1.
(C) R is in group 2.
(D) S is in group 3.
(E) T is in group 1.

(10). If Q is in group 1 and S is in group 3, which one of the following CANNOT be true?
(A) G is in group 2.
(B) T is in group 1.
(C) There is exactly one child in group 1.
(D) There is exactly one child in group 2.
(E) There is exactly one child in group 3.

(11). If G is the only child in group 1, which one of the following must be true?
(A) F is in group 3.
(B) K is in group 3.
(C) Q is in group 2.
(D) R is in group 1.
(E) S is in group 2.

KEYS: EAEDB