10/4
5.一排位子,A在其中,A在从左数的第30个从右数的第33个,
在A的左边抽去2个右边抽去4个,还剩多少 (during my test, it is about books on a shelf)
8.2的N次方是10!的因子,问N最大是几
9.n把椅子(1-n)放在环形的路上,其中3号在顶(top),18号在底(bottom),问n=?
math new JJ.
3、What is the possibility of event A or event B or both?
A) The possibility of event A is 0.6
B) The possibility of event B is 0.4
5、there is a list M( m1,m2, m3, …..m10), ask: 是否至少有7个小于9?
A)LIST中至少有一个大于9
B)The number after the third is at least greater than the preceding one.
6、有一个集合里有一个数是20,问RANGE是否大于12?
A)最大的数是50
B)最小的数是30(数字不确定)
(好险,confirm之前发现错了)
8、98年产量是X, 2000年产量是Y,问产量下降是否超过10%?
A)X/Y>5/4
B) Y/X>1/4
6.有100位选民,A B两个候选人, 有一个两行三列的表格,分别列出多少人支持A,反对A,中立;多少人支持B,反对B,中立。问既又支持A支持B的有机人。
(1)有10人既反对A反对B
(2)一共有XX人中立。
.?Min(10,M)
(1)M=Max(20,Z)
(2)M=Max(10,M)
DS: 45% the apartments with <=3 people living in each one. What’s the median?
(1)80% of the apartments have <=5
(2)35% of the apartments have >=5
###(C) Note: Median is 4
what is the meaning of the following sentence?? ::::
there are no any entrees ordered by more than 5 people
DS: 4 entrees, one of them is “dish”, 15 people, Q: is there at least 1 person order “fish”?
(1)there are no any entrees ordered by more than 5 people
(2)one dish less than 4 people ordered …(something like this)…
### (C) …(SURE)
Why???????
海伦公式是什么????
2。四信放四信封,求只有一封放对的概率
---------------------------------
1/3
WHY???
求大于700的三位数中奇数个数?(要求every unit is non zero, and different)
(91)
WHY??
还是不明白,请讲讲
[em18]作者: tongxun 时间: 2002-10-4 13:12
5、A在从左数的第30个从右数的第33个:30与33重复,必须减去1。共30+32=62个。
在A的左边抽去2个右边抽去4个:减掉6个。62-6=56。
8、2的N次方是10!的因子,问N最大是几
1*2*3*。。。*10,中含2的数有:2*4*6*8*10=2^8, n may be one of sequence(1,2,3,...8), so the biggest one is 8.作者: tongxun 时间: 2002-10-4 13:30