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终于考完了,贡献几个数学狗狗。
1. DS. x,y,z 是正数(?),是否 x<y<z ?
1. x<2y<z
2. 2x<y<2z
2. 有1.。。20 共20个数,不放回的取5个,问取到 5个中有 10 ,20 的概率
a. 1/4 b 1/5 c1/10 d 1/19 e 1/20
3. 某club last year 26 visit England, 26 visit France and 32 visit Italy, no one visit both E and F, 6 visit E and I, 11 visited F and I.
how many members visit at least a country?
4. 135791113...999. 奇数排列,问第110 是省么数?
5. Fast printer can print x% than slower, what percentage of the time decreased use fast printer to slower pinter.
6. 正方形 with point at (1,0),(3,0)(1,1)(3,1), a line pass (0,0), what's the slope can divide the rectangle to two equal area?
7. 2^(x^2+Bx+11/2) = 根号8 and x = -2, what's B?
8. 99999^2-1^2 =? ==> 10^5(10^5-2)
9. 最小的数是? 1. 0.3^2, 2. 0.03^2, 3. (3/10)^2, 4. 3/10^2 5.?? 不记得了
10. 某公司P产品1995 占了公司利润50%, 1996 P的利润上升30% 而其他的利润不变,? 1996 P的利润百分比
11.
休息一下,想起来再写吧 |
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