本月30日下午一点考试,还有9天,实际有效准备时间为8天。今天下午一点考的prep(作文没考,其他都是严格按真实考试执行,包括喝红牛,呵呵。)
结果:M49 V34 690
M:37错11,很奇怪能到49分,前十错2。
V: 40错17,(时间来不及,做到34时时间只有5分钟左右,结果最后乱点都没点完,最后8题错6个),错17个还能得34同样让我吃惊,不过前十也是错两个。具体分布为:SC 16错11,CR 10错3,RC 14 错3。SC一直头大,做了一遍OG(边做边分析了一遍后面的解释,看了LZM,BY,错题大部分看看也明白错在哪里,就是考试的时候时间紧,没有时间分析清楚就选了。)
---时间一次是个大问题,从两周前开始做GWD(一共做了7套XY13),一直都是超时25分钟的样子,今天做prep一直提醒自己加快,结果还是做不完,估计如果正常做完时超时10分钟左右。郁闷啊,不知怎么提高。难道真的只有猜?
最后谈谈M,之前做过GWD的一套题,错4个,而且时间剩余10分钟。但今天明显感觉时间不够用,难道PREP的数学比GWD难?
另外还有几个题目错了还是不明白,请教各位:
1,For every positive even integer n,the function h(n) is defined to be the product of all the even integers from 2 to n,inclusive.If p is the smallest prime factor of h(100)+1,the P is:
1>2~10 2>10~20 3>20~30 4>30~40 5>greater than 40------The answer is 5>
2,For how many integers is 2的n次方=n的2次方(不会输次方,没法子)?
The answer is TWO---- 看到答案后算出应该是2和4,但是请问一下考试时有什么方法?还是简单代入?
3,if X>Y的2次方>Z的4次方,which of the following statements could be true?
1> x>y>z 2, Z>Y>X 3 X>Z>Y
答案为1,2,3全对,非常奇怪,如果x=0.1 y=0.2 z=0.3 的话应该是满足题目要求,但是明显和答案不一致。
4,At least 100 students at a certain high school study Japanese.If 4 percent of the students at the school who study French also study Japanese,do more students at the school study French than Japanese?
1>16 students at the school study both French and Japanese.
2>10 percent of the students at the school who study Japanese also study French.
答案为B。
5 If the integer a and n are greater than 1 and the product of the first 8 positive integers is a multiple of a 的n次方,what's the value of a?
1> a的n次方=64
2》n=6
答案为B。
唉,数学居然还有这么多没搞清楚,晕啊。本来还想考700呢,不知道还有没有办法,各位大牛指导一下啊,多谢!
1>2~10 2>10~20 3>20~30 4>30~40 5>greater than 40------The answer is 5>
可知,n=2k, h(n) = (2)x(2x2)x(2x3)x ... x(2k) = (2^k)(k!)
所以,h(100)+1 = (2^50)(50!) + 1
-> h(100)+1 is 奇数, p is not 2
-> h(100) 含有 3 作为 factor, 因此 h(100) = 3y (y is integer); 然而, 3y+1 不能被 3 整除, 所以 h(100)+1 不含有 3 作为 factor
-> 同理, 所有小于50的质数都不能作为 h(100)+1 的 factor
-> 总结可得, p>50, 选 <5>
2,For how many integers is 2的n次方=n的2次方
3,if X>Y的2次方>Z的4次方,which of the following statements could be true?
1> x>y>z 2, Z>Y>X 3 X>Z>Y
答案为1,2,3全对,非常奇怪,如果x=0.1 y=0.2 z=0.3 的话应该是满足题目要求,但是明显和答案不一致。
4,At least 100 students at a certain high school study Japanese.If 4 percent of the students at the school who study French also study Japanese,do more students at the school study French than Japanese?
1>16 students at the school study both French and Japanese.
2>10 percent of the students at the school who study Japanese also study French.
答案为B。
5 If the integer a and n are greater than 1 and the product of the first 8 positive integers is a multiple of a 的n次方,what's the value of a?
1> a的n次方=64
2》n=6
答案为B
多谢!牛人一个!
另:第三题有人说是:could be true说明只要有能满足的情况即可,不一定要在所有的情况下都满足,这样题目就很容易理解了。
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