04年2月数学机井总结 2004

04年2月数学机井总结
2004-02-03 10:19:36 转自www.mba8.com

1. Know W=k/(r^2). when r=4000, W=200. What is W when r=5600?
答案：5000/49

2. 0.99999*1.00001-.99998*1.00002=?
答案：-3*10^(-10)

3. 5 people race, no tie in the result. how many possible orders in which K is ahead of M.
答案：60

4. There are five minorities in a nation, the total population is 50 millions, I, J, K, L, M, N (listed from the most to the least), the population in each minority might be equal, the N has 2 millions people, and M has 21 percent of the total population, what might be the most numbers of the population of L? (my ans: 6)
答案：题目数字好像有问题，M就占21％了，明显不对。但请大家注意这类题目

5. DS：what is X and Y
1 3x+4y=6
2.-12y-9x=-18
答案：E

6. 10 stamps, 3 belong to B, randomly pick 2, what is the possibility that neither of these two are B's stamp?
答案：C(7,2)/C(10,2)

7. (-1,3) and (2,-1) are endpoints of a diagnole of a square, what is the perimeter of the square.
答案：14.14

8. 20!的值=Ax10(n次方), 问n=?
答案：4

9.There are 2 Cylinders, Radius1=2R2, Height1=1/2H2, ask 表面积 of Cylinder1/表面积of Cylinder2?
答案：1

10. Ask how much is X and Y?
a. 2X-4Y=11
b. -6X+12Y=-33
答案：E

　

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