jj整理，上战场前的贡献till 11.25比较难的题 - ChaseDream

12、DS：某个人读6本诗集，每个诗集里的诗都不相同，问他是否读某个诗集里的诗超过6首

2. n是大于1的整数,T是集合{k*n},其中k为所有整数.问n是多少?
    (1) -7是T中的一个
    (2)49是T中的一个
    解:选A,因为此时n=7,k=-1,不可能有其他解,而条件(2)可能得到n=7,k=7或n=49,k=1.

1 DS: an positive integer N=P+M+S PMS are positive consecutive intergers P<M<S; N=xyz where xyz are positive consecutive intergers where X<Y<Z, what is the remainder when N is divided by 5

(1)when P is divided by 5, the remainder is 1

(2)when X divided by 5, the remainder is 1

2. two kinds of books: hardcover and papercover ones, if the range of the prices of both kinds of books is 50 and the range of the prices of paperbooks is10, what is the range of the prices of the hardcover books:

(1)the lowest price of hardcover books is 2 less than the highest price of paperbook

(2)the highest price of hardcover books is 40 more than the highest price of papercover books

3 if 1<s<t, s and t are positive intergers and are all factors of n, which of the following must be the factor of n^(st)

1s^t

2(st)^2

3 s+t

1,2

3 预计股票A在明年增长的可能性是54%，预计股票B在明年增长的可能性是68%，问：两个股票明年都没有发生上述两件事情的最小可能性是多少：（题目基本是这样，希望遇到这道题目的其他考友来确认）
A: 22%
B: 32% RIGHT

C: 37%
D: 46%
E: 68% (这个比例不确定)

实际上P(A∩B)=P(A|B)*P(B),在当B发生导致A必发生的情况下,即P(A|B)=1时达到最大: P(A∩B)=P(B).

15.DS题,有30个东西排5列,问是否至少有一列超过9个东西?(1). 平均而言,有3列至少各有8种东西(2)有二列exactly各2个,

2似乎也不一定啊
可以是 2,2,8,9,9 啊
这样没有超过9的

15.DS题,有30个东西排5列,问是否至少有一列超过9个东西?(1). 平均而言,有3列至少各有8种东西(2)有二列exactly各2个,

2似乎也不一定啊
可以是 2,2,8,9,9 啊
这样没有超过9的

你题目抄错了，问的是没有一列超过8~