Chinagmat:四月GMAT考试机经真题
5页1、Chinagmat:四月GMAT考试机经真题Question: 1题目If x and y are integers, is x2 1 y2 + 1?(1) x y(2) y 0选项A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.D. EACH statement ALONE is sufficient.E. Statements (1) and (2) TOGETHER are NOT sufficient.Answer: C +w:ivyexam 获取更多保分机经题库 (GMAT保分730; GRE保分330 ;TOEFL保分100) 注释:条件
2、(1)(2)同时成立时,xy0,又因为x和y都是整数,所以为x2 y2 3,不等式成立。单独条件无法论证,如果x=2, y=-5,等式不成立,(1)不充分;当x=2, y=2,等式不成立,(2)不充分,所以选择C。Question: 2题目 Is s + t 0 ?(1) s t 0(2) s2 t2 0选项A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.D. EACH statement ALONE is sufficient.E. Statements (1) and (2) TOGETHER are NOT sufficient.Answer:
3、 C +w:ivyexam 获取更多保分机经题库 (GMAT保分730; GRE保分330 ;TOEFL保分100)注释:因为(2) s2 t2 =(s+t)(s-t)0,则s+t0,s-t0或s+t0,s-t0,则s-t0;所以条件(1)(2)同时成立时,不等式才成立,单独条件无法论证,选择C。Question: 3题目Is r t?(1) 5r 5t = 2(2) 5r + 5t = 10选项A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.D. EACH statement ALONE is sufficient.E. Statements (1
4、) and (2) TOGETHER are NOT sufficient.Answer: A +w:ivyexam 获取更多保分机经题库 (GMAT保分730; GRE保分330 ;TOEFL保分100)注释:(1) 5r 5t = 5(r-t)=2,所以r-t=2/5,所以rt,条件充分;(2) 5r + 5t =5(r+t)=10,所以r+t=2,无法推出rt。所以选择A。Question: 4题目Which of the positive numbers x or y is greater?(1) y = 2x(2) 2x + 5y = 12选项A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.C. BOTH statements TOGETHER are sufficient, but NEITHER stat
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