※ 引述《chilis (庞克新生报到^_^)》之铭言： : Q21: : On a recent trip, Mary drove 50 miles. What was the average speed at which : she drove the 50 miles? : (1) She drove 30 miles at an average speed of 60 miles per hour and then : drove the remaining 20 miles at an average speed of 50 miles per hour. : (2) She drove a total of 54 minutes. : ------------------------------------------------------------------------------------------------------------ : Answer: D : Q22: : If a company allocates 15 percent of its budget to advertising, 10 percent to : capital improvements, and 55 percent to salaries, what fraction of its budget : remains for other allocations? : A. 4/5 : B. 3/5 : C. 3/10 : D. 1/5 : E. 1/10 : ------------------------------------------------------------------------------------------------------------ : Answer: D : Q24: : A glass was filled with 10 ounces of water, and 0.01 ounce of the water : evaporated each day during a twenty-day period. : What percent of the original amount of water evaporated during this period? : A. 0.002% : B. 0.02% : C. 0.2% : D. 2% : E. 20% : ------------------------------------------------------------------------------------------------------------ : Answer: D : Q29: : Each week a certain salesman is made a fixed amount equal to $300 plus a : commission equal to 5 percent of the amount of these sales that week : over $1,000. What is the total amount the salesman was paid last week? : (1) The total amount the salesman was paid last week is equal to 10 percent : of the amount of these sales last week. : (2) The salesman’s sales last week total $5,000. : ------------------------------------------------------------------------------------------------------------ : Answer: D 不懂解答?? : 1. => 300+ (T-1000)*.05= 0.1*T : 2. => 300 + (5k-1k)*.05 : Q36: : If M is the least common multiple of 90, 196, and 300, which of the following : is NOT a factor of M? : A. 600 : B. 700 : C. 900 : D. 2,100 : E. 4,900 : ------------------------------------------------------------------------------------------------------- : Answer: A : M=90.196.300的倍数 : 90因数=2*3*5 : 196因数=2*23 : 300因数=2*3*5 : 不知怎算下去了 = = : 以上我的问题~~^^ Q21 (1) 可分别算出两段路程的行驶时间，则总行驶时间也可得出 平均速率 = 总距离 / 总时间 ......sufficient (2) 已知总时间则，题目已给总距离，则平均速率也可得出......sufficient Ans: D Q22 1-(15%+10%+55%)= 20% =1/5 Ans: D (这题很基本喔，不难!) Q24 (0.01*20)/10 = 2% Ans: D (仔细想一定会的!) Q29 你实际拿到的薪水 = 300 + 0.05(总销售-1000) (1) 条件意思是你实际拿的薪水等於你总销售的10% 解答假设总销售为T，则 300+0.05(T-1000) = 0.1*T 可解出T，代回假设式子可解出实拿薪水数 ......sufficient (2) 5k =5000,1k =1000 条件告诉你总销售$5000，直接代回假设式可得实拿薪水 ......sufficient Ans: D Q36 最小公倍数为2^2*3^2*5^2*7^2 (1)600 = 2^3*3*5^2 不可以 (2)700 = 2^2*5^2*7 可以 (3)900 = 2^2*3^2*5^2 可以 (4)2100 = 2^2*3*5^2*7 可以 (5)4900 = 2^2*5^2*7^2 可以 Ans: A --

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