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GMAT数学精华题型实例解析(2)

未知GMAT2016-10-17 11:37

摘要:下面为大家整理了GMAT数学精华题型实例解析(2),供考生们参考,以下是详细内容。 PREP 7. 905-!-item-!-187;#058000575 For every positive even integer n, the function h(n) is defined to be the product of al

  下面为大家整理了GMAT数学精华题型实例解析(2),供考生们参考,以下是详细内容。

  PREP

  7. 905-!-item-!-187;#058&000575

  For every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n, inclusive. If p is the smallest prime factor of h(100) + 1, then p is 用余数来解决

  (A) between 2 and 10

  (B) between 10 and 20

  (C) between 20 and 30

  (D) between 30 and 40

  (E) greater than 40

  选E

  34. 2927-!-item-!-187;#058&003024

  During an experiment, some water was removed from each of 6 water tanks. If the standard deviation of the volumes of water in the tanks at the beginning of the experiment was 10 gallons, what was the standard deviation of the volumes of water in the tanks at the end of the experiment?

  (1) For each tank, 30 percent of the volume of water that was in the tank at the beginning of the experiment was removed during the experiment.

  (2) The average (arithmetic mean) volume of water in the tanks at the end of the experiment was 63 gallons.

  36. 4841-!-item-!-187;#058&004235

  In a certain deck of cards, each card has a positive integer written on it. In a multiplication game, a child draws(抽) a card and multiplies the integer on the card by the next larger integer(下一个数). If each possible product is between 15 and 200, then the least and greatest integers on the cards could be

  (A) 3 and 15

  (B) 3 and 20

  (C) 4 and 13

  (D) 4 and 14

  (E) 5 and 14

  【答案】C

  48. 6225-!-item-!-187;#058&004914

  A certain city with a population of 132,000 is to be divided into 11 voting districts, and no district is to have a population that is more than 10 percent greater than the population of any other district. What is the minimum possible population that the least populated district could have?

  最大比其他城市大不超过10%,那就设除了最小的以外都比它大10%

  (A) 10,700

  (B) 10,800

  (C) 10,900

  (D) 11,000

  (E) 11,100

  【答案】D

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