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标题: [转帖]6.26 maths JJ, Shanghai [打印本页]

作者: smart    时间: 2007-6-29 01:12     标题: [转帖]6.26 maths JJ, Shanghai

先申明:数学只有50。所以我给的新题的答案我不确定正确。

1. DS, 三个数r.s.t.问他们的mean 和median相等吗?

1) mean of r, s, and t is s

2) r<s<t

这题一开始想选C,后来发现直接选A也可以,因为三个数字的平均数是s的话,另外两个数或者一个大一个小,或者和s一样大,那中数肯定还是s。后来还是选A了

2.DS,一个集合里很多个连续整数,求这个集合的和

1)最小数和最大数的和是1

2)最大数是25

选C了

3.DS.有个地方卖房子,40%的房子送车库,问这个地方有多少套房子

1)有车库和没有车库的房子正好差3套

2)2 apartments do have parking lot for every 3 apartments do not have parking lot

第二个条件看了半天。。。很长一串。。。这题我不确定,选了A

4.已知(x^n - 1)/(x-1)=x^(n-1)+x^(n-2)+x^(n-3)+...+x+1。又知道1+7+7^2+7^3+...+7^8=一个数A(给出这个数了),求7^9

5.一个集合,里面都是连续整数,问1是不是在这个集合里

1) 忘了

2)for each n in the set, n-1 is also in the set

我选B了

6.有一个比较恶心。DS: is 31 a factor of x*y?(好像是这样)

1) 31^2 is a factor of x*y

2) 31^2 is NOT a factor of x和y的最小公倍数

估计这道我是做错了

7. DS. n是小于10的正整数,求n

1) n和1/n的十分位数一样

2) n和1/n的百分位数一样

(都是本月出现的机经的变体)

想不起来了。。。再想想,想到了再补充

作文:

AI. 对那些自己没有经历过的事情,Public figures should aviod expressing personal opinions

AA.  The following appeared as part of a newspaper editorial. “Two years ago Nova
    High School began to use interactive computer instruction in three academic subjects. The school dropout rate declined immediately, and last year’s graduates have reported some impressive achievements in college. In future budgets the school board should use a greater portion of the available funds to buy more computers, and all schools in the district should adopt interactive computer instruction throughout the curriculum.”

Verbal...偶么资格说话,考了太烂了...不误导大家

不过有个sc非常有印象,我的verbal第一题,看了要哭了。。。

5个选项里直接就可以排除掉三个,留下的两个唯一的区别是一个用fire,一个用fires,题目里面没划线的部分是a various variety of

我就想着fire一般不可数。。。但是a various variety of能形容么。。。所以后来还是选了那个fires的。。。疯掉了,这个都考。。。






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