OG16 题目总数：883 做题总人数：29711 平均准确率：72.2%
本题库为OG16版的题目。OG 即Official Guide 官方指南，是备考GMAT的必备资料。本题库的OG题目练习，帮助你进一步发现薄弱知识点和易错题型。OG建议大家刷3遍，第一遍刷纸质，第二遍计时精刷，第三遍刷错题。做完后记得及时分析总结。
来源： 833人已做 680难度 67.1%正确率
The Glass House Mountains in Queensland,Australia, were sighted in 1770 by the English navigator Captain James Cook, by whom they were named supposedly because its sheer wet rocks glistened like glass.
来源：测评题 2376人已做 600难度 73.2%正确率
Marcia's bucket can hold a maximum of how many liters of water?(1) The bucket currently contains 9 liters of water.(2) If 3 liters of water are added to the bucket when it is half full of water, the amount of water in the bucket will increase by 1/3.
来源： 376人已做 650难度 86.2%正确率
If x, y, and z are positive integers, is x - y odd?(1) x = z2(2) y=(z-1)2
来源： 768人已做 650难度 86.6%正确率
Is n an integer?(1) n2 is an integer.(2) √n is an integer.
来源： 639人已做 650难度 66.8%正确率
What is the value of (2t+t-x)/(t-x)?(1)2t/(t-x)=3(2) t-x = 5
来源： 529人已做 650难度 83.7%正确率
来源： 1235人已做 680难度 75.2%正确率
If n is apositive integer, is (1/10)n ＜0.01?(1) n＞2(2) (1/10)n-1＜0.1
来源： 581人已做 650难度 85%正确率
来源： 1187人已做 600难度 64.8%正确率
来源： 1444人已做 680难度 86.6%正确率
2x + y = 12│y│≤ 12 For how many ordered pairs (x, y) that 2 solutions of the system above are x and y both integers?
【OG20-P809-881题】Gusty westerly winds will continue to usher in a seasonably cool air mass into the region, as a broad area of high pressure will build and bring fair and dry weather for several days.
Since 1990 the percentage of bacterial sinus infections in Aqadestan that are resistant to the antibiotic perxicillin has increased substantially. Bacteria can quickly develop resistance to an antibiotic when it is prescribed indiscriminately or when patients fail to take it as prescribed. Since perxicillin has not been indiscriminately prescribed, health officials hypothesize that the increase in perxicillin-resistant sinus infections is largely due to patients` failure to take this medication as prescribed.Which of the following, if true of Aqadestan, provides most support for the health officials` hypothesis?
Tanya prepared 4 different letters to be sent to 4 different addresses. For each letter, she prepared an envelope with its correct address. If the 4 letters are to be put into the 4 envelopes at random, what is the probability that only 1 letter will be put into the envelope with its correct address?
【OG20-P810-883题】November is traditionally the strongest month for sales of light trucks, but sales this past November, even when compared with sales in previous Novembers, accounted for a remarkably large share of total vehicle sales.
【OG20-P156-69题】When n liters of fuel was added to a tank that was already 13 full, the tank was filled to 79 of its capacity. In terms of n, what is the capacity of the tank, in liters?
A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrain makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active lifestyle on people. Clearly, this circumstance explains the long lives of people in Wistar.Which of the following, true, most seriously weakens the argument?
Clearbell Telephone provides slow-dialing (SD) service to customers for a low fee, and fast-dialing (FD) service to other customers who pay a somewhat higher fee. FD technology, however, is so efficient that it costs Clearbell substantially less per average call to provide than does SD. Nonetheless, accountants have calculated that Clearbell’s profits would drop if it provided FD to all its customers at the current low-fee rate. Assume that installation costs for FD are insignificant if the customer already has SD service. Which of the following, if true about Clearbell, best explains the results of the accountants’ calculation?
A product that represents a clear technological advance over competing products can generally command a high price. Surprisingly, perhaps, the strategy to maximize overall profit from a new product is to charge less than the greatest price the market will bear. Many companies charge the maximum possible price for such a product, because they want to make as much profit as they can and technological advances tend to be quickly surpassed. The drawback is that large profits on the new product give competitors a strong incentive to quickly match the new product's capabilities.In the argument above, the two portions in boldface play which of the following roles?
If the sequence x1, x2, x3, …, xn, … is such that x1 = 3 and xn+1 = 2xn – 1 for n ≥ 1, then x20 – x19 =