gmatpp-datasufficiency考試復(fù)習(xí)資料-資料下載頁
2025-08-14 15:38本頁面
【導(dǎo)讀】由於這是眾人一起完成的,難免會有疏失,希望大家可以一起修正錯誤,讓這份詳解變得更完整!K是整數(shù)的平方,也不確定,所以不充分。因為z是正數(shù),所以題目可改寫w<z?四個未知數(shù),有四個方程式,可解,充分!
【正文】 sufficient 32. 2346!item!187。058amp。002760 Is positive integer n divisible by 3 ? (1) 362n is an integer. (2) n214 is an integer. 【 答案 】 A 【思路】 (1) n= 36 a=6a, which is divisible by 3sufficient (2) 1442 2 36?? ,n=2 or 6insufficient 33. 2446!item!187。058amp。002780 If a 0, b 0, and c 0, is a(b c) = 0 ? (1) b – c = c b (2) cb = bc 【 答案 】 D 【思路】 (1)3與 7互質(zhì) ,則 n必為 7的倍數(shù) , 7n is intergersufficient (2)5與 7互質(zhì) ,則 n必為 7的倍數(shù) , 7n is interger sufficient 34. 2500!item!187。058amp。002904 Are positive integers p and q both greater than n ? (1) p q is greater than n . (2) q p 【 答案 】 C 【思路】 (1) p=?,q=?,n=?insufficient (2)qp, n=? insufficient (1)(2)n=負(fù)數(shù) ,and p,q=+sufficient 12 35. 2600!item!187。058amp。002931 What is the value of xy ? (1) y = x + 1 (2) y = x2 + 1 【 答案 】 E 【思路】 (1)xy=x(x+1)= 2x +x insufficient (2)xy=x( 2x +1)= 3x +xinsufficient (1)(2)insufficient 36. 2847!item!187。058amp。003085 If ax + b = 0, is x 0 ? (1) a + b 0 (2) a b 0 【 答案 】 E 【思路】 (1) a=? ,x=? insufficient (2) a=? ,x=? insufficient (1)(2) a=? ,x=? insufficient 37. 3042!item!187。058amp。003156 Are the integers z and f to the right of 0 on the number line? (1) The product of z and f is positive. (2) The sum of z and f is positive. 【 答案 】 C 【思路】 z and f are positive (1)z and f =++, insufficient (2)z and f =++, , + insufficient (1)(2)z and f=++sufficient 38. 3096!item!187。058amp。003188 Some of the students enrolled at College T are parttime students and the rest are fulltime students. By what percent did the number of fulltime students enrolled at College T increase from the fall of 1999 to the fall of 2020 ? (1) There were 50 more fulltime students enrolled at College T in the fall of 2020 than in the fall of 1999. (2) The total number of students enrolled at College T increased by 5 percent from the fall of 1999 to the fall of 2020. 【 答案 】 E 【思路】 2020 partA, 2020 fullB,1999 partC,1999 fullD,問 BDD? =? (1)B=D+50 insufficient (2) ( ) ( ) 5100A B C DCD? ? ? ?? insufficient (1)(2) ( 5 0 ) ( ) 5100A D C DCD? ? ? ? ?? insufficient 39. 3150!item!187。058amp。003215 If c and d are integers, is c even? 13 (1) c
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