OG16 题目总数：883 做题总人数：28051 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。
【OG20-P277-281题】If x and y are positive numbers, is x+1y+1 >xy ?（1）（2）
来源：OG16 759人已做 680难度 66.4%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：OG16 2230人已做 600难度 72.8%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：OG16 350人已做 650难度 86.6%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：OG16 731人已做 650难度 86.9%正确率
Is n an integer?(1) n2 is an integer.(2) √n is an integer.
来源：OG16 600人已做 650难度 67%正确率
What is the value of (2t+t-x)/(t-x)?(1)2t/(t-x)=3(2) t-x = 5
来源：OG16 502人已做 650难度 83.5%正确率
【OG18-P287-403题】If n is a positive integer, what is the tens digit of n ?(1) The hundreds digit of 10n is 6.(2) The tens digit of n+1 is 7.
来源：OG16 1144人已做 680难度 74.5%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：OG16 551人已做 650难度 85.1%正确率
【OG20-P294-458题】In a certain business, production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i. What is p if i= 70?(1) e = 0.5 whenever i = 60.(2) p = 2.0 whenever i= 50.
来源：OG16 1086人已做 600难度 64.9%正确率
【OG20-P294-457题】If n and k are positive integers, is √n+k>2√n ?(1) k＞3n(2) n + k＞3n
来源：OG16 1311人已做 680难度 86%正确率
Statisticians studying the health effects of uranium mining on Navajo communities have found others besides miners and millworkers to be affected; birth defects, children’s cancer, and altered birth ratios of males and females are much higher in mining than in non-mining communities.
Much of the hope for continued improvement of the economy lies in the projection of increasing consumer spending this year.
The overall slackening of growth in productivity is influenced less by government regulation, although that is significant for specific industries like mining, than the coming to an end of a period of rapid growth in agricultural productivity.
Since the 1930s aircraft manufacturers have tried to build airplanes with frictionless wings, shaped so smoothly and perfectly that the air passing over them would not become turbulent.
A study of children of divorced parents found that ten years after the parents’ divorce, children who had been under six years of age at the time of the settlement were not preoccupied, nor even very curious, about the reasons that led to their parents’ divorces.
Lines n and p lie in the xy-plane. Is the slope of line n less than the slope of line p ?(1) Lines n and p intersect at the point (5,1). (2) The y-intercept of line n is greater than the y-intercept of line p.
【OG20-P578-662题】Sascha: The attempt to ban parliament's right to pass directed-spending bills—bills that contain provisions specifically funding the favorite projects of some powerful politicians—is antidemocratic. Our nation's constitution requires that money be drawn from our treasury only when so stipulated by laws passed by parliament, the branch of government most directly representative of the citizens. This requirement is based on the belief that exercising the power to spend public resources involves the ultimate exercise of state authority and that therefore _________.Which of the following most logically completes Sascha's argument?
【OG20-P577-661题】Historian: Fifteenth-century advances in mapmaking contributed to the rise of modern nation-states. In medieval Europe (from the fifth to the fifteenth century), sovereignty centered in cities and towns and radiated outward, with boundaries often ambiguously defined. The conceptual shift toward the modern state began in the late fifteenth century, when mapmakers learned to reflect geography accurately by basing maps on latitude-longitude grids. By the midseventeenth century, nearly all maps showed boundary lines.Which of the following would, if true, most strengthen the historian's reasoning?
【OG20-P576-658题】Marketing executive for Magu Corporation: Whenever Magu opens a manufacturing facility in a new city, the company should sponsor, or make donations to, a number of nonprofit organizations in that city. Doing so would improve Magu's image in the community, and thus the money spent on such charitable ventures would lead to increased sales.Which statement would, if true, point to the most serious weakness in the marketing executive's advice?
【OG18-P517-576题】The Eurasian ruffe, a fish species inadvertently introduced into North America's Great Lakes in recent years, feeds on the eggs of lake whitefish, a native species, thus threatening the lakes' natural ecosystem. To help track the ruffe's spread, government agencies have produced wallet-sized cards about the ruffe. The cards contain pictures of the ruffe and explain the danger they pose; the cards also request anglers to report any ruffe they catch.Which of the following, if true, would provide most support for the prediction that the agencies' action will have its intended effect?