近期ＪＪ疑问

gmat02

246. 9*10^10-2*10^5接近哪个数
[确认]E 10^11

思路？

348.
一样,请大家讨论吧.这到数学怎么和阅读有一拼.
From the beginning of last year, Price per share increased K percent. Earning per share increased M percent. Question: ask the ratio in percentage for price per share to earning per share in increase. In term of K, M.
[确认](K-M)/(100+M)。此题是一老JJ。

题目不太懂？　有无列式

352 DS题,说农场里有animals 60头，其中2/3either猪or牛,问猪(或者牛)的数目是多少?
(1) the number of cow is more than twice as many as the number of pigs.
（2）pigs的数more than 12
[确认]C

题目不太懂

353. 做pizza还是什么的那道，选用6中cheese, 选用2种咚咚，如果pizza采用cheese种类数量 和 采用咚咚种类的数量相同问pizza的种类
[确认] 27

题目不太懂？安逸

359.problem solving有一道新题看不太懂，我背了下来，请大家补充，谢谢！
the prosibility of A increased is 54%, the prosibility of b increased is 68%, what's the "greatest prosibility of neither of the 2 event occur"?
a) 22%， b) 32% ， c) 37%， d)46%， e)??
[思路]这是求两个事件都不发生的概率吧。
我选32，完全重合，取最大的补集，
最小的话，应该是22，大家呢？

我同意３２，　不过最小该率应是０吧

360.相片外面有1寸的边，总面积W，边增加到2寸，总面积W+52,问相片的周长？
[确认]40

列式？

484.还有一个z的百分为是多少
A:100z的十位是2
B:1000z的个位是2
[确认]E

为何不是Ａ？

David0822

I see.
thank you.

gmat02

equation is wrong, please refer to that from Tongxun.

tongxun and sherry, thank you very much.

David0822

360.相片外面有1寸的边，总面积W，边增加到2寸，总面积W+52,问相片的周长？
[确认]40
列式？
---------------
[ab = W]   &   [(a+2) * (b+2) = W + 52]
2(a+b) = 48
---------------
somebody tell me what the problem is, please.

sherrytang

353:
C6^1+C6^1+C6^2=6+6+15=27

484:
Z=0.1A+0.01B+0.001C
(1)100Z, THE TENTH DIGIT IS A
(2)1000Z, THE UNIT DIGIT IS C
So, there is no clue to know B. The answer is (E)

sherrytang

352：
P FOR PIG， C FOR COW
P+C=60*2/3=40
(1)C>2P
(2)P>12
IF C=2P+1, THEN P=13, C=27
IF C=2P+4, THEN P=12 WILL NOT BE VALID. AS P>12
SO THE ANSWER IS (C).

tongxun

246. 9*10^10-2*10^5接近哪个数
主要看选项中有哪些。按这个式子看，. 9*10^10-2*10^5=10^5（9*10^5-2）
其中9*10^5-2基本就等于9*10^5，所以比较接近9*10^10

348： P=price，E=earning
{[p（1+k%）/e（1+m%）]-p/e}/（p/e）

359、100-68=32  

（x+2）（y+2）=W
（x+4）（y+4）=w+52