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题目:七人选四个(J,K,L,M,N,P,Q)
J,K必选一,但不全选
N,P必选一,但不全选
N cannot be selected unless L is selected
Q cannot be selected unless K is selected
分析:此提考的就是unless条件,按新东方的方法来,N选àL被选,千万不要当成(NL)条件,两者不同
题目:花工种花,G,O,R,V四种花,种1,2,3 三排,每排三朵,9个花要cover这四种
条件: at least twice as many R as O must be used
1 must contain exactly two types of flowers
2 must contain at least one R
3 must contain ar least one G but no O
分析:不难,要记住第一个条件,算是个构架吧
题目:F,G,H,I,J,K,L,M,N九人按高低分三个三人组(1th,2th,3th),前三高在1th,后三低在3th,其余在2th.
条件:I高于G
G高于J,K
J高于M
M高于H
H高于N
K高于F,L
分析:合并条件,找一三两组的人
题目:三人(LMN)买东东(fruitt cup,hot dogs,petzls,and shish kebabs)
条件:每人每种最多买一份
IF 一个人买hot dog,他一定不要shish kebab--à ~(hs)
At least一个人要hot dog,at least 一个人要pretzel
M buys shish kebab
N buys fruit cup
L,N not buys pretzel
M not buys any kind of food that N buys.(大条件重要,记下!)
分析:因为没有对每人买的东东的个数限定,所以不要在4个东东下文章,主要是看三个人
by the way:象fruitt cup,hot dogs,这样的东东命名时一定要统一是用前词还是后词
还有有的在其中夹了什么 fruit cup,water cup,这样的,后来问一个关于cup的题,要小心
五人F,G,H,K,L,每人一个position: President,Manager,Technician.Only President不被人supervised
其他人每人被Supervised by exactly one 人,who is either the president or the manager.每个被su的人与su的
人的position不同。
条件:exactly 一个 president
at least,president su 一个manager
each manager su 一个人 at least
F不su any one
G exactly su 两个
分析:F为T,manage少于等与Technician人数
注意:不要犯习惯思维president就管manager,manager管technician
十个鸟: KIND MALE FEMALE
Gold H J,K
Love M N
Para Q,R,S T,W
把鸟按同类pair(一MALE,一FEMALE)拿出,一次at most拿2 pairs,剩下的分在两组
条件:每组鸟少于等于4个
同sex+同kind的鸟不在一组
一旦J or W 拿出,S不拿出。
分析:关键在:同同不在一组的条件,看到 para的MALE有三个鸟,所以,一定
至少拿出其中一个
题目:一个委员会5人,其中一人为头头。这五人在5个好人(F,G,J,K,M)与4个坏人(P,Q,R,S)中选
委员会在好坏人中至少分别有两个
头头一定是从exactly选了2个人的group(可能是好也是坏)中选
if F is selected,Q must be selected
if G is selected, K must be seclede
if either J or M is selected,the other must also be selected
M and P cannot both be selected
分析:关键在第二个条件,后来的题有问到的,分为2好3坏和3好2坏两种,隐含有K/Q or both入选
因为:FàQ,GàK,JMàQ,在好人中F,G,JM中必有入选,所以K/Q or both
题目:6个协奏曲在123456六天演,这六个中两个从G作的H,J,K,两个从R作的M,N,O,P,两个从V作
的X,Y,Z中选出。
条件:N被选-àJ被选
M被选àJ,O一定不被选
X被选àZ,P一定不被选
IFJ,O都被选àJ在O前
X=5TH-àR的一个被选为在1th.
分析:做题时要时刻记住构造条件2,2,2。
题目 :
题目:3个男 K,L,M,3个女:R,S,T,跳三个舞1,2,3,每个舞3对狗男女,每对一男一女
条件:K 在1 或2中配S
不论谁在2陪了R,一定要在3中陪S
no people can partner each other in more than one dance
分析:做题时要突出条件二
IF MR在1中互陪,问下列哪个对(LR一定在2中互陪)
1
MR
2
* R
3
* S
在一二中必有KS,所以3中没有KS,所以*不是K,又2中没有MR,所以*不是M,所以*是L
大小排列:G,H,I,J,K,M,N,O加入一公司
条件:H before N
K before J
N and J before O
N before O
J before M
G before I
分析:条件一定要合并完全,表达清楚,就不会出错。(先将N,J分开,最后统一合并)
作图题:R,S,T,U四个雷达区域,part of R intersects T,part of S intersect T,R 不 intersect S。
U完全in R,and 完全in T. 四个飞机J,K,L,M杀过来。
条件:each plane is in ar least one of the four areas
J is in S
K is not in any detection area that J is in
L is not in any detection area that M is in
M is in exactly one of th areas
分析:作表示集合的图就可以了
1
2
3
4
5
6
如图6个CITY,有8个机构:4 hospital,2 jials,2 univercity分配给这六个城
条件:每一个机构最多分一个城
没有一个CITY有多于1个的jail,和多于一个的univercity
Univercity和Jail不同城
Each jail is located in a city that contians at least one hospital
The university are located in two cities that do not share a common boundary
City 3 contains a university and city 6contains a jail
分析:注意第二个条件,千万别忘了
prior to this years annual promotion reviesw, the staffof a law firm consisted of partners H,R,associate O,and
assistants G,J,L,S,T,W,during each annual review,each assistant and associate is considered for promotion to the next higher rank
and ar least one person is promoted from each of the two lower ranks.an assistant is promoted to associate when a majority
of higherranking staff votes for promotion ,an associate is promoted to partner when a majority of partners vote for promotion,
Everyone eligibel votes on every promotion ,No one joins or leaves the firm
O never vote for promoting G,J,T
R never vor for promoting L,S
H never vote for promoting J,W
分析:提干中的条件比单列的条件更重要,其实就是阅读,注意提中有问after next year’s review可不是this year
题目:湖中五岛J,K,L,M,O,用桥连之
条件:每桥连两岛
每两岛一桥连
一岛最多连三岛
J,K,Lare each directly connected by bridge with one or both of M and O
L is directly 与两岛连
K与一岛连
JO,MO,分别相连
分析:画个草图
题目:六个小屋,如图排 J K L
M N O
After a snowstorm,residents shovel a single continuous path that connects all of the chalets
and meets the following condintions:
条件:这条路共五段,每段连两个小屋
每个小屋都要连到
每个小屋最多连2次
路不交叉
J连N,K连L
分析:主要读出提干的最后一句就搞定是个 single continuous path
一种化学反应题:1,2,3,4个烧杯分别装有red,blue,green,orange四种chemical,定义一个experiment为
把一个烧杯中的东东全到到另一中,生成物不能再用。
条件:1+2=red
2+3=orange
3+1/4=blue
4+1/2=green
题目都是问experiment后的颜色,较易。 |
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