gmatpp-datasufficiency考試復(fù)習(xí)資料-全文預(yù)覽
【正文】 cturers paid amounts proportional to the number of scenes in which their product was depicted in the movie. If each manufacturer paid x dollars per scene, how much did the manufacturer of product D pay for this advertising? (1) The manufacturers of products A and B together paid a total of $560,000 for this advertising. (2) The manufacturer of product B paid $60,000 more for this advertising than the manufacturer of product C paid. 【 答案 】 D 【思路】 3X=? (1)21X+7X=560000,可得 Xsufficient (2)7X=4X+60000,可得 Xsufficient 29. 2131!item!187。002479 If x and y are integers, is the value of x(y + 1) even? (1) x and y are prime numbers. (2) y 7 【 答案 】 C 【思路】 (1)if x=3, y=2 則 x(y+1)=odd, x=3, y=3,則 x(y+1)=eveninsufficient (2)y7 (y+1)might be even or odd則 x(y+1)=even or oddinsufficient 10 (1)(2)y7 and prime number 則 (y+1)=even 則 x(y+1)=evensufficient 27. 2023!item!187。002455 One member of a mittee of 5 men and 8 women resigned and was not replaced. What fraction of the remaining members were men? (1) 127 of the remaining members were women. (2) The member who resigned was a woman. 【答案】 D 【思路】 (1) 可知 512是 man,充分 (2) 原本 woman 是 813 ,一個女人 resigned 後 ,女人比例變成 712 ,也可以推出 man: 512 ,充分 25. 1873!item!187。001222 Is p1 22?rr (1) p = r (2) r 0 【答案】 C 【思路】 將題目變成 22212 02 ( 2 )r r rpp r p r??? ? ???? (1) p=r 分子分母都無法知道正負(fù)數(shù) ,不充分 (2) 不知道 P 也無法知道是否大於零 ,不充分 (1)+(2) 結(jié)合 (1)(2)改寫式子為 2222 0( 2)rrrr?? ??,分子只剩 2(正號 ),分母也都是正號 ,所以相除確定大於零 ,充分 ! 23. 1765!item!187。000855 If 2x 3y, is x negative? 8 (1) y 0 (2) 2x + 5y 20 = 0 【答案】 D 【思路】題目 2x 3y ? 2x+3y 0 , x 是負(fù)的嗎 ? (1) 當(dāng) y0, x 一定要是負(fù)的 ,才能小於零 ,充分 (2) 將條件改成 2x+3y+2y=20,已知 2x+3y 0,所以 y 一定 0, 在代回 2x+3y 0,同樣可得出 x0, 充分 21. 1407!item!187。058amp。058amp。058amp。 不教 Arts人數(shù) 為 d 設(shè) Total=t 題目已給 a+c=,求 a=? (1) a+b+c+d = t = 200,無法得知 c,不充分 (2) c=72,根據(jù)題目給的算式 (因?yàn)椴恢偤?t),還是無法得知 a (1)+(2) C=72 t=200,根據(jù) a+c=,已經(jīng)可以得知 a是多少 ,充分 ! 14. 935!item!187。000429 Of the people who attended a workshop, 60 percent were teachers and some of the teachers were teachers of language arts. What percent of the people who attended the workshop were teachers of language arts? (1) 200 people attended the workshop. (2) 72 of the teachers who attended the workshop were not teachers of language arts. 【答案】 B 6 【思路】 Teacher ~ Teacher Arts a b ~ Arts c d 註 : 設(shè)是 Teacher amp。C 我們不知道 A or B or C 是多少 ,所以無法算出 Aamp。A + Aamp。 B amp。 B = [A amp。000341 Sets A, B, and C have some elements in mon. If 16 elements are in both A and B, 17 elements are in both A and C, and 18 elements are in both B and C, how many elements do all three of the sets A, B, and C have in mon? (1) Of the 16 elements that are in both A and B, 9 elements are also in C. (2) A has 25 elements, B has 30 elements, and C has 35 elements. 【答案】 A 【思路】畫個圖應(yīng)該可以很簡單算出 A amp。000324 Juan bought some paperback books that cost $8 each and some hardcover books that cost $25 each. If Juan bought more than 10 paperback books, how many hardcover books did he buy? (1) The total cost of the hardcover books that Juan bought was at least $150. (2) The total cost of all the books that Juan bought was less than $260. 【答案】 C 【思路】 設(shè) paperback = p, hardcover=h,題目問 if P10, h=? (1) 25h? 150 ? h? 6 ,不知 h 切確值 ,不充分 ! (2) 依題意 8p+25h 260,一樣無法知道 h 等於多少 ,不充分 (1)+(2) 條件說 if P10 當(dāng) p=11,12,13… ,代入 8p+25h 260,可得 h=6,充分
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