GMAT數(shù)學題題目典型做法

2014-01-14

在做GMAT數(shù)學題的時候，會用到很多不同知識點，而這些知識點又是零散的，所以需要人工總結起來，以便于我們更快捷地進行GMAT復習，小編為大家總結了GMAT數(shù)學題的一些典型做法，希望對大家有所幫助。

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 用余數(shù)來解決

（A） between 2 and 10

（B） between 10 and 20

（C） between 20 and 30

（D） between 30 and 40

（E） greater than 40

選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（下一個數(shù)）。 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?

大比其他城市大不超過10%，那就設除了小的以外都比它大10%

（A） 10,700

（B） 10,800

（C） 10,900

（D） 11,000

（E） 11,100

【答案】D

55. 6892-!-item-!-187;#058&005291

Which of the following inequalities has a solution set that, when graphed on the number line, is a single line segment of finite（有限的） length?

（A） X4 ≧ 1

（B） X3 ≦ 27

（C） X2 ≧ 16

（D） 2 ≦ |X| ≦ 5

（E） 2 ≦ 3X + 4 ≦ 6

57. 7044-!-item-!-187;#058&005427

If n is a multiple of 5 and , where p and q are prime numbers, which of the following must rt be a multiple of 25 ?

（A）（B）（C）（D）（E）

【答案】D

60. 7189-!-item-!-187;#058&005472

Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and $3 per page each time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed? 這題注意：要revised在revise之前也要第一次type一下！

（A） $430

（B） $620

（C） $650

（D） $680

（E） $770

【答案】D

42. 3744-!-item-!-187;#058&003565

John and Mary own shares of stock in a certain company. Does John own more shares of the company's stock than Mary?

（1） Mary owns more than 500 shares of the company's stock.

（2） The number of shares of the company's stock that John owns is 400 less than twice the number of shares of the company's stock that Mary owns.

選C

（1）M>500