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： 3353人已做 680难度 71.9%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 2974人已做 650难度 73.6%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： 503人已做 650难度 86.9%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： 983人已做 650难度 87.6%正确率
Is n an integer?(1) n2 is an integer.(2) √n is an integer.
来源： 850人已做 650难度 66.2%正确率
What is the value of (2t+t-x)/(t-x)?(1)2t/(t-x)=3(2) t-x = 5
来源： 1290人已做 650难度 86.7%正确率
来源： 1982人已做 680难度 77%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： 750人已做 650难度 85.9%正确率
来源： 2558人已做 600难度 69.2%正确率
来源： 3214人已做 680难度 88.9%正确率
【OG20-P290-424题】The only articles of clothing in a certain closet are shirts, dresses, and jackets. The ratio of the number of shirts to the number of dresses to the number of jackets in the closet is 9:4:5, respectively. If there are more than 7 dresses in the closet, what is the total number of articles of clothing in the closet?(1) The total number of shirts and jackets in the closet is less than 30.(2) The total number of shirts and dresses in the closet is 26.
Sasha: It must be healthy to follow a diet high in animal proteins and fats. Human beings undoubtedly evolved to thrive on such a diet, since our prehistoric ancestors ate large amounts of meat. Jamal: But our ancestors also exerted themselves intensely in order to obtain this food, whereas most human beings today are much less physically active. Jamal responds to Sasha by doing which of the following?
【OG20-P289-410题】If r and s are positive integers, can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits?(1) s is a factor of 100.(2) r is a factor of 100.
【OG20-P181-228题】How many of the integers that satisfy the inequality (x+2)(x+3)x−2 ≥0 are less than 5？
If ab ≠ 0 and points (-a, b) and (-b, a) are in the same quadrant of the xy-plane, is point (-x, y) in this same quadrant?(1) xy > 0(2) ax > 0
【OG18-P162-111题】At a certain instant in time, the number of cars, N, traveling on a portion of a certain highway can be estimated by the formula N= 20Ld600+s2 where L is the number of lanes in the same direction, d is the length of the portion of the highway, in feet, and s is the average speed of the cars, in miles per hour. Based on the formula, what is the estimated number of cars traveling on a 1/2 mile portion of the Highway if the highway has 2 lanes in the same direction and the average speed of the cars is 40 miles per hour? (5,280 feet =1mile)
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.
【OG20-P562-610题】 Arts advocate: Few universities require that students who are specializing in science and technology take many art courses.However, real progress in science and technology requires an element of creativity,which the arts foster. Thus,to help science and technology students succeed in their careers, universities should increase the number of art courses required for them.Which of the following would,if true, most strengthen the argument above?
【OG20-P585-685题】A company has developed a new sensing device that, according to the company's claims, detects weak, ultralow-frequency electromagnetic signals associated with a beating heart. These signals, which pass through almost any physical obstruction, are purportedly detected by the device even at significant distances. Therefore, if the company’s claims are true, their device will radically improve emergency teams ability to locate quickly people who are trapped within the wreckage of collapsed buildings. Which of the following, if true, most strengthens the argument?
【OG20-P814-903题】In the major cities of industrialized countries at the end of the nineteenth century,important public places such as theaters,restaurants,shops,and banks had installed electric lighting ,but electricity was in less than 1 percent of homes,where lighting was still provided mainly by candles or gas.