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新人求大神帮帮忙！3天后考试，发个帖子求大神帮忙顺便攒人品！
在prep中有几道题有点疑惑
1. If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r ?
(1)n is not divisible by 2
(2)n is not divisible by 3
2.The number 75 can be written as the sum of the squares of 3 different positive integers. What is the sum of these 3 numbers?
选项分别有：17,16,15,14,13这五个
3.A certain library assesses fines for overdue books as follows. On the first day that a book is overdue, the total fine is $0.10. For each additional day that the book is overdue, the total fine is either increased by $0.30 or doubled, whichever results in the lesser amount. What is the total fine for a book on the fourth day it is overdue？
选项分别有：0.6 0.7 0.8 0.9 1.0
题中the fourth day构筑理解为overdue了4天，所以一种是0.1+0.3*3=1.0，另一种是0.1*2*2*2=0.8 所以选0.8
但是答案是选0.7，是不是构筑理解题目出错了？
4.For every positive even integer n, the function h(n) is defined to be the product of all the even integersfrom 2 to n, inclusive. If p is the smallest prime factor of h(100)+1, then p is
a.between 2 and 10
b.between 10 and 20
c.between 20 and 30
d.between 30 and 40
e.greater than 40
5. A certain city with a population of 132,000 is to be divided into 11 voting districts, and no district is to have a population that is more than 10 percent greater than the population of any other district. What is the minimum possible population that the least populated district could have？
五个选项分别有：10,700 10,800 10,900 11,000 11,100
6. Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the averge (arithemetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax , in Country R's currency, for a person in that country whose annual income is I ?
A. 50+I/200
B 50+3I/100
C. 50+I/40
D. 100+I/50
E. 100+3I/100
I/200就表示200分之I，题中选项是分子分母的分数形式。
…………………………………………………………………………………………………………………………
新加一题，求解答，感谢！！
7。 In the xy-plane, does the line with equation y=3x+2 contain the point (r,s) ?
(1) (3r+2-s)(4r+9-s)=0
(2) (4r-6-s)(3r+2-s)=0
--------我是二战之后心情很down的分割线----------
1.26 广州
因为记住的不多，而且构筑目前心情很down，跪了。。
就记得有两篇阅读在一个【1.23晚9点】那个阅读寂静整理帖子里面有，一个就是帖子里面的第8个，纽约黑人奴隶，就是white这个人有个作品，然后好几个时代的黑人奴隶的情况，还有作者对他的研究提出的建议。寂静里面整理满全面，但是无奈我看了记不住，辜负了辛苦整理的大家~
还有一个阅读就是第7个 星云【我当时看到这个寂静的第一反应是边江大大配音的画江湖里面的李星云大师兄！】
and then当时我做题的时间不够了，然后因为没记住这个寂静。。想选都选不了。。T_T 【乱想的惩罚来了。。。】
AWA： During the month of June, ...一个business manager把automobiles的luxury models和inexpensive models一起advertising on the newspaper 然后把luxury models放在展柜前面展示并且放到中心什么什么的， 这样卖的好。又说了在February的时候，广告照做，但是inexpensive的放在前面跟中间的时候， oversales lower了。所以manager就觉得，要增加利润，就要把luxury放在中心展卖。 我理解的大概就是这样。
数学有一道题，因为耗时长记住了。。但我感觉最后我还是没对。。
具体的题目记不住，但是要求什么记住了，就是n是整数，以n分之一的形式相加 从n=33到n=64求和 和的范围 选项有1/64<sum<1/32 1/32<sum<1/16 1/8<sum<1/4 1/4<sum<1/2 1<sum<2 前面三个选项记不住了，就记得有后面两个
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发表于 2016-1-23 12:00:46
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