260、 问下面哪一个是直线y = 5x 的垂直线的方程表达式? 1) y = -5x 2) y = 5/x 3) y = -5/x 4) y = x/5 5) y = -x/5
讨论答案: 5) y = -x/5
284、2^w * 3^z=72,求 2^(w-2)*3^(z-1)=?
作者答案:答案为6 easy
291、一个硬币分正反两面,问扔两次同一硬币,至少有一次是正面的概率是多少?
作者答案:答案有两个是1/4.2/3
294、1/X,X,X2, 那个最小, 1)X>0 2) X<1, 注意和老JJ不同
讨论答案:
296、 一个数列,A3=A2+A1, AN=P,问AN+2,
作者答案:应该是4P9、A company ‘s profit increased x percent in 1980 than 1975, and increased y percent in 1985 than in 1980, what percent increased in 1985 than 1975.
1) x+y=4
2) (1+x/100)( 1+y/100)=4
b
177、DS: woman:man:children =5:2:7, how many woman?
A: total of woman and children are 12;
B: there are fewer than 4 for men.
I chose D.
【答案】A
【思路】A中woman为5个。B中没有总人数。
179、PS. a company sell a product. The profit increased to 25 prcent of the cost from 20 percent of cost after adjusting to new selling price. The new price is $80, the cost is not changed. ask the old price?
answer: $76.8
【答案】66.24
【思路】cost=c,1.25c=80,c=64,1.2c=76.8
还有不知道是不是新题,我记得
1。知道一个轮子的半径是24,转了270度是多少圆周,答案有18派,我选36派。
2。N是267的倍数,N 的个位数是8,Q=N/267,问Q的个位数,我的答案是6。
总之数学不难,看了JJ可省很多时间。
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)