[转帖]刚刚考完， 一点jj

vagrant

数学非常有帮助，遇到不少jj上的题目。

Issue: A leader is accepted only when he has the ability to perform a task that he expected other person to perform.

Argument: A security service firm should suggest all its clients to use ID dodges because----
Some of them are copy from the old JJ since they are almost the same.

1. 正六边型，知面积，求边长。

2．a是x公司销售，b是y公司销售。a和b的月收入均为底薪加提成，问底薪是否相同？

1）上月两人收入相同 2）上月两人销售汽车数目相同

3．两数列A，B. a1=1, b1=k. when n〉=2, an=bn-1-an-1 bn=bn-1+an-1. 问a4=
(some of the answers include B2)


4.一個整數(0.0025)(0.025)(0.00025)*10^k, 問k最小為多少


5．在高速公路路面paint. 已知1 gasoline 可以paint 面積P feet^2. 現在有一片要paint的width是X inch(X有給數字), length是 Y mile(Y有給數字),問一共要多少gasoline的漆. (有給inch, foot, mile之間的單位換算率)


6. line a, b, have the same slope, can line b's y-intercept be known?
1) line a's x-intercept is -1, and throught point (0, -1)
2) line b througth point (10, 20)

7. f(w)= 2x.3y.5z (x,y,z are square number),f(v)=9f(w), ask： f(w)-f(v)=?

8.一個地區的電話號碼有7個digits. 若每個電話號碼的前三位都是一樣的, 如都是921-xxxx. 現在共有282000個號碼, 請問需要多少exchange來support.

9. What's the median of the monthly rent payment of last year?
1. each of the first six month : 8000
2. total of last year: 102000

10. 4 persons, a, b, c, d, chose two. the probability of both a and b be chosen.

11. 一家商店賣三種商品, 問所有商品的平均售價
a) 1/3 的商品賣xx刀(有給數值), 1/4的商品賣 yy刀(有給數值), 其他的商品賣zz刀(有給數值)
b)所有商品共228個items

12. 0 to 99, inclusive, devided by 3, how many have the remainder of 1.

13. x is multiple of 6, y is multiple of 14, is xy multiple of 105?
1) x is multiple of 9
2) b is multiple of 25
(can't remember exactly what the numbers are.)

14. 1/(2square4*5square7), turn into decimal format, how many none zero number does it has?