七个学生:四年制KIM 和 LEE 三年制PAT和ROBIN 两年制SANDY, TERRY AND VAL 有三种房间可供选择:SINGLE, DOUBLE AND TRIBLE 每间至少1人,至多3人。 根据下列规则安排: 1、 KIM/LEE ≠ TRIBLE 2、 SANDY/TERRY/VAL ≠ SINGLE 3、 LEE ≠ROBIN 4、 KIM = PAT
整理,隐含条件KIM=S/D, KIM=PAT → KIM = PAT T: SANDY TERRY VAL ROBIN D: KIM = PAT S: ROBIN LEE LEE ≠ ROBIN KIM = PAT
1、 排除法 选C 2、 ROBIN = S → SANDY/TERRY/VAL = T, LEE=S, KIM/PAT = D, 或3D 选B 3、 KIM = S/D, PAT = KIM → PAT = KIM = D 4、 ROBIN = T → 有一个两年制的学生为D,且和LEE在一起。 5、 T和V 为不同的D,→ 3D1S,而且,LEE=S 6、 排除法,选C
Questions 7-11 A worker will insert colored light bulbs into a billboard equipped with exactly three light sockets, which are labeled lights 1, 2, and 3. The worker has three green bulbs, three purple bulbs, and three yellow bulbs. Selections of bulbs for the sockets is governed by the following conditions:
Whenever light 1 is purple, light 2 must be yellow.
Whenever light 2 is green, light 1 must be green.
Whenever light 3 is either purple or yellow, light 2 must be purple.
整理分析: 1、 1 2 3 P y 2、 g G 3、 p P/Y 大写为主选项,小写为从选项 不受限制的排列: g/y y/p g
一个律师从周一到周六会见证人,在六天中必须有连续的两天会见HOSTILE WITNESSE。NO HOSTILE WITNESSES Q,R,UX,Y,AND Z各一上午或下午。Q和R必须同时。 条件: 1 2 3 4 5 6 MORNING X AFTERNOON 2、 U > QR > X 3、 X/Y > Z
12、 选D 13、周二有人 → 5,6为连续的两天,Y=1/2/3。 结合 U > QR > X 选D 1 2 3 4 5 6 MORNING U NONE X AFTERNOON Y QR Z 14、Y < X → 5,6天必须有至少一人→ 1,2,3天有连续两天空缺 → 2必须空 缺。 选 B 15、R < Y QR > X → Y > QR > X → 1,2,3无空缺 → 5,6空缺。选E 16、 1,3A = NONE → 5,6空缺 → Z = 4A 选E 17、Z = 6M → 空缺在前3天 排除法选A