GMAT真题9

15 Math Section ------------------------------------------------------------------------------------------------------------ Q1: The population of City X is 50 percent of the population of City Y. The population of City X is what percent of the total population of City X and City Y? A. 25% B. 33 31 % C. 40% D. 50% E. 66 32 % Answer: ------------------------------------------------------------------------------------------------------------ Q2: Guy’s net income equals his gross income minus his deductions. By what percent did Guy’s net income change on January 1, 1989, when both his gross income and his deductions increased? (1) Guy’s gross income increased by 4 percent on January 1, 1989. (2) Guy’s deductions increased by 15 percent on January 1, 1989. 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: ------------------------------------------------------------------------------------------------------------ Q3: If wz < 2, is z < 1? (1) w > 2 (2) z < 2 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: ------------------------------------------------------------------------------------------------------------ Q4: 16 Which of the follo...