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小女子数学从小就一直不太好，可能问题对于大虾来说比较简单，请大家别笑啊，诚心请大家帮忙解答。。。再次谢谢了！！！问题比较多，大家如果觉得麻烦可以选一题两题答，这里高手多，一人一题就能全部解决了。。。真的真的感谢大家！！！
98 The three-digit integer kss is the sum of the two-digit integers ks and rs, where k, r, and s are the digits of the integers. Which of the following must be true? I. k = 2 II. r = 9 III. s = 5
A. I only B. II only C. III only D. I and II E. II and III 102 Jim’s income comes from his wages and from tips. For a certain month, if Jim’s income from his wages was 180 percent of his income from tips, approximately what percent of his total income came from tips?
A. 18% B. 25% C. 36% D. 50% E. 72% 104 In a recent election, Ms. Robbins received 8,000 votes cast by independent voters, that is, voters not registered with a specific political party. She also received 10 percent of the votes cast by those voters registered with a political party. If N is the total number of votes cast in the election and 40 percent of the votes cast were cast by independent voters, which of the following represents the number of votes that Ms. Robbins received?
A. 0.06N + 3,200 B. 0.1N + 7,200 C. 0.4N + 7,200 D. 0.1N + 8,000 E. 0.06N + 8,000 106 A certain pilot flew 400 miles to City K at an average speed of 350 miles per hour with the wind and made the trip back at an average speed of 250 miles per hour against the wind. Which of the following is closest to the pilot’s average speed, in miles per hour, for the round-trip? A. 280 B. 290 C. 300 D. 310 E. 320 109 A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
d ?
A. 16% B. 32% C. 48% D. 84% E. 92% 117 If ½x - 1½ - ½x - 2½ = 0, then x =?
A. 0 B. 2/3 C. 1 D. 1/2 E. 3/2 124 Working simultaneously and independently at an identical constant rate, 4 machines of a certain type can produce a total of x units of product P in 6 days. How many of these machines, working simultaneously and independently at this constant rate, can produce a total of 3x units of product P in 4 days?
A. 24 B. 18 C. 16 D. 12 E. 8 141 On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?
A. 33
% B. 40% C. 50% D. 60% E. 66
% 151 Of the families in City X in 1994, 40 percent owned a personal computer. The number of families in City X owning a computer in 1998 was 30 percent greater than it was in 1994, and the total number of families in City X was 4 percent greater in 1998 than it was in 1994. What percent of the families in City X owned a personal computer in 1998?
A. 50% B. 52% C. 56% D. 70% E. 74% 155 The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 10 percent less than the charge for a single room at Hotel G. The charge for a single room at Hotel R is what percent greater than the charge for a single room at Hotel G ? A. 15% B. 20% C. 40% D. 50% E. 150% 159 10,000100 is equivalent to which of the following? I. (1002)(100100) II. 100200 III. 10400 A. None B. I only C. III only D. II and III only E. I, II, and III | 
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发表于 2007-11-27 10:48:00
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