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12月5号一些数学机经
onion 2003-12-10 20:07:16
下面是我12月5号在北京考的一些数学机经,没想到回忆起来的还不少,尽管有些很简单。应该是换了题库的,很多都面生,题目也许不难但是叙述长一些,这样就费了不少时间读题以免犯粗心的错误。时间不算松快。不过月底考的G友应该不用太担心,有机经的帮助,考场上会省些时间的。Good luck & best wishes!

1. 452*36*17
7 个数字中,哪个数字增加1,乘积增加小于1000?
A. 1
B. 2
C. 5
D. 7
E. 4

2. N 有几个不同的质数?
A. N 是7200的因子
B. 180 是N的因子

3. M, P, T 是positive integer, m

A. T-P=P-M
B. Forgot

4. 一个序列,从第三位数起,每个数都与它前面连续的两个数的和有关,the number is the sum of the 2 numbers in the sum is odd or ½ if the sum of the 2 numbers are even, the forth number is 7 and the fifth number is 5, what is the first number?

5. Give the English definition of standard deviation, 2 or 3 lines, there are 4 numbers, 9, 8, 7, 4, ask the standard deviation of these 4 numbers?

6. X, Y 是正整数,X 是3的倍数吗?
A. X-Y 是3的倍数
B. X-2Y是3的倍数

7. N除以3的余数是多少?
A. N除以2 余1
B. N+1除以3 余2

8. 正方体内有以内切球,直径为6,求正方体内最长的一条对角线长度

9.一正方形,10 <长< 20, 5<宽<9, 求周长范围

10.
A. S, T 关系
B. t > 1
题目记不清,但是通过A, 求出T 有两值1,2,根据B,可确定T=2, 则答案选C

11. 卖门票 on Monday & Tuesday, children’s ticket $7 each, adult $10 each, children’s number on Tues is twice the number on Monday, adult’s number on Tues is ½ the number on Monday, the total revenue on Monday is $2700, revenue on Tuesday is $2400, what’s the children’s number on Monday?

12. –2

13.3个不同的旗子排列视为一个信号,有四面不同的旗子,可排成几个信号?

14.从50加到100的和?

15.孩子们拿笔,either 3 pens , 2 pencils, or 1 pen, 3 pencils, the average pen number is 1.6, what’s the average pencils number? (the number is not accurate)

16. lottery $16 billion, separate as gifts, government payment, and expense, give the relation of payment and gift & the relation of payment and presentation, ask the payment in $ amount

17. 7 red tomatoes, 5 green tomatoes, ask the probability of all 3 tomatoes are red ….

18. 某数的80%是多少? (具体叙述忘了,但翻译过来就是求这个式子)

19. Is xy >x^2y^2
A. 14X^2=3
B. Y^2=1

20. Mary 和 Tom 同时从a地出发到b地,问Mary 比 Tom早到几分钟?
A. a地到b地距离100miles.
B. Mary的小时速度 比 Tom小时速度快5 miles.

21. r>1, r * = 1-(1/r) what’s the value of : r * - (r-1)*

22. Is xyz>0
A. XY>0
B. YZ>0

23. A (0,3) B (-2,0), C在AB上,C的横坐标是-5,求纵坐标?(数不准,有图)

24.People in Senior only is 16, ppl in physics only is 24. ppl in senior only + ppl both in senior and physics = ppl in physics only. What’s the percentage does ppl both in senior and physics account for all senior ?

25. 一个三角形x,y,z,分别为三个外角,确定x的度数?
A. x=y
B. x=z

26. DS 根据账户里的钱付费用问题,$400 之内付1。5%,超出部分付1.2%, 求某人上月账户里有多少钱?
(题目叙述长,数不准)


Verbal 做得感觉不好,把握不大,所以Cancel 了。



 

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