11/08 Boston JJ

11/08 Boston M (51) V (42) 760. JJ for fellow CDers.

AA: Disc Depot, a local music store has increased foot traffic into the store since it started radio advertising. The owners of Disc Depot are wealthy enough to retire. However, Carlo's Clothing's profits have been staganant for the past three years. Therefore Carlo's Clothing should switch from newspaper advertising to radio advertisement.

AI: Rise of multinational companies has lead to global homogeneity. Because people want similar products and services, regional difference will disappear.

Math: overall, I think it's easier than prep but much harder than gwd.

1. A integer, when divided by 6, has remainder 2 and when divided by 8 has remainder 4. What's the possible remainder when it is divided by 48. <I chose 20>

2. S (n) = 1+2+...+n. What's S(2n)-S(n)? <I chose n^2+S(n)>

3. line l is l = f(x); line k is k = -f(x). line l passes through (4,5). Which point does line k must pass. There are three choices, which I cannot recall. <I chose only one correct. (4,-5)>

4. DS: x+y>0? 1) x/(x+y)>0; 2) y/(x+y)>0; <I chose E. ex. x=1 & y=1 vs. x=-1&y=-1>

5. 某人第一小时以某个速度走了多远，又以另一速度走了一段。问两小时平均速度。题目有具体数字，我不记得了。

6. 这个记得不是很清楚。3^12*33^10 （还是3^10*33^12) 约等于什么？方法是99^n*剩下的。99当100算。剩下的很明显知道是几位数。

阅读：

1. 围棋比赛为了增加比赛的看点，出台一个新规定：前45个move不可以叫平。这篇很长，问题有些tricky.具体的想不大起来了

2. 原来人们预测二氧化碳的时候都假设冬天植物不再呼吸。新的证据表明，他们还是呼吸的。

3. 美国的资产配置有问题 - 太注重短期回报。所以在经济整体，有一些行业会过渡投资。在公司里面，research是cost，经常也被cut.

剩下一个想不起来了。也很简单。读起来很快，答案也挺显而易见的。

逻辑：

真的什么都想不起来了。。。汗

语法：

基本都是长句子。都是些逻辑错误，注意平行，和修饰的紧凑性。实在抱歉，具体题目想不起来了。

...these are all I can remember. will put up more as they come to my mind...

果然大NN都是无视换题时间的。。

恭喜MM！！

恭喜恭喜，真是太厉害了！

我想问一下第二题的答案是不是应该是 S(2n) = n^2 + 2S(n) ? 哪位好心人帮忙确认一下，谢谢拉

NN,

thanks for sharing JJ. But why my GMATPrep doesn't have MATH section?

f(n)=1+2+3+...+n   f(2n)=1+2+3+...+n+n+1+...+n+n=2(1+2+3+...+n)+n2=2f(n)+n2 

这题是不是应该是这个答案？请教牛人！！！

我算出来的答案跟5L的一样

谢谢！

本月第1个超高分啊！

LZ MM 先休息下，再想想阅读和逻辑鸡精吧，呵呵！