Re: [計量] 好多題計量請教

看板GRE作者Merica (美加文教)時間15年前 (2011/01/24 17:08)推噓2(2推 0噓 0→)

留言2則, 2人參與討論串19/26 (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 ↑此算法完全正確 : 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? 應是108-(2/5X+X) = X A is subtracted from B 意為 B-A 另"減"之正確拼法為subtract，不是substract : 3. Column A Column B : (2x-17)/2 x-17 ANS:A Column A和B各自乘以2，變成2X-17和2X-34 因2X-17 > 2X-34，所以答案A : 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? integer有包含0，另外0不是正，也不是負，又是偶數。 : 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 你漏了3，3÷7 = 0餘3 : 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　　　2x2+2 = 6 2+2-2 = 2　　　2-2-2 = -2　　 2x2-2 = 2 2+2x2 = 6　　　2-2x2 = -2　　 2x2x2 = 8 共有 -2, 2, 6, 8 四種 : 今天題目很少，麻煩大家一下！（以上內容由美加黃冠文老師提供） -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.36.57.205

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ooox

01/24 22:37, , 1^F

01/24 22:37, 1^F

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balance9235

01/25 23:21, , 2^F

01/25 23:21, 2^F

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