Re: [計量] 好多題計量請教
看板GRE (GRE入學考試)作者DoubleFish (他和她的童話故事)時間15年前 (2011/01/20 04:17)推噓1(1推 0噓 2→)留言3則, 1人參與討論串17/26 (看更多)
※ 引述《balance9235 (退伍變米蟲)》之銘言：
: 1. Recently 30,744 residents of Lyon County and 20,496 residents of Saline
: County voted on a referendum. A total of 38,430 residents of the two
: counties voted yes. If the same perdentage of the voters in each county
: voted yes, how many of the residents of Lyon County voted yes?
: (A) 7,686
: (B) 10,248
: (C) 15,372
: (D) 17,934
: (E) 23,058 ANS:(E) 38430/(30744+20496)*30744 好醜
數字是很醜啦，但約分一下後就是很漂亮的3/4啦，30744又可被4整除
就單純考計算速度而已，算式你已經列出來了
: 2. When 2/5 of a certain number is added to the number and this sum is
: substracted from 108, the result is equivalent to the original number.
: What is the original number?
: (A) 35
: (B) 45
: (C) 54
: (D) 60
: (E) 270 ANS:(B) 2/5x+x-108=x 算出來是270，答案也是對，少注意到甚麼嗎?
108-(2/5x+x)=x才對
: 3. Column A Column B
: (2x-17)/2 x-17 ANS:A
改成x-17/2跟x-17就很明顯了
: 4. If the product of 6 consecutive integers is equal to one of them, what is
: the largest possible value of one of the integers?
: (A) -1
: (B) 0
: (C) 5
: (D) 6
: (E) 12 ANS:(C) integer有包含0嗎?
連續整數的積必須等於成員之一，必定只能透過0這特別的整數了
答案要最大的整數，所以從0自己開始往正整數數6個囉
: 5. Column A Column B
: The number of positive 13
: integers less than 100
: that have a remainder 3
: when divided by 7. ANS:A 我算13
3 10 17 24 31 38 45 52 59 66 73 80 87 94
: 6. If each of ★ and ◆ can be replaced by ＋,－, or ×, how many different
: values are there for the expression 2★2◆2?
: (A) 3
: (B) 4
: (C) 5
: (D) 6
: (E) 7 ANS:(B) 我算-2,0,2,6,8五種
2+2+2=6 2-2-2=-2 2+2-2=2 2x2x2=8
2-2x2是-2不是0唷
: 今天題目很少，麻煩大家一下！
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