已选分类
管理学
单选题In an office, 40 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 1 0 years of service? (A) 48 (B) 64 (C) 80 (D) 144 (E) 160
单选题If 75 percent of a class answered the first question on a certain test correctly, 55 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly?
单选题What is the remainder when the positive integer x is divided by 2? (1)x is an odd integer. (2)x is a multiple of 3. (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题DuringthefouryearsthatMrs.Lopezownedhercar,shefoundthathertotalcarexpenseswere$18,000.Fuelandmaintenancecostsaccountedforofthetotalanddepreciationaccountedforoftheremainder.Thecostofinsurancewas3timesthecostoffinancing,andtogetherthesetwocostsaccountedforofthetotal.Iftheonlyotherexpensesweretaxesandlicensefees,thenthecostoffinancingwashowmuchmoreorlessthanthecostoftaxesandlicensefees?(A)$1,500more(B)$1,200more(C)$100less(D)$300less(E)$1,500less
单选题The nuclear polyhedrosis virus helps control gypsy moth populations by killing the moth"s larvae. The virus is always present in the larvae, but only every sixth or seventh year does the virus seriously decimate the number of larvae, thereby drastically setting back the gypsy moth population. Scientists believe that the virus, ordinarily latent, is triggered only when the larvae experience biological stress.
If the scientists mentioned above are correct, it can be inferred that the decimation of gypsy moth larvae populations by the nuclear polyhedrosis virus would be most likely to be triggered by which of the following conditions?
单选题Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won? (1)The team competed in 4 play-off games. (2)The team won all of its play-off games. (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题If n is an integer, which of the following CANNOT be a factor of 3n+4?
单选题Over the last 40 years there has been a great increase not only in the number of agricultural pesticides in use but also in the care and sophistication with which they are used by farmers. Nevertheless, the proportion of agricultural crops lost to certain pests worldwide has increased over the same period, even when the pests concerned have not developed resistance to existing pesticides.
Which of the following, if true, best explains how improvements in pesticide use have been accompanied by greater losses to certain pests?
单选题If x and y are integers, is xy+1 divisible by 3? (1)When x is divided by 3, the remainder is 1. (2)When y is divided by 9, the remainder is 8.
单选题A computer is programmed to generate a list of multiples of prime numbers 2,3 and 5, as shown below: Program 1—List multiples of 2 Program 2—List multiples of 3 Program 3—List multiples of 5 How many integers less than 100 will appear on all of the lists of programs produced above? (A) None (B) 1 (C) 3 (D) 5 (E) An infinite number of integers
单选题Thefigureaboverepresentsarectangularparkinglotthatis30metersby40metersandanattachedsemicirculardrivewaythathasanouterradiusof20metersandaninnerradiusof10meters.Iftheshadedregionisnotincluded,whatisthearea,insquaremeters,ofthelotanddriveway?
单选题Today"s low gasoline prices make consumers willing to indulge their preference for larger cars, which consume greater amounts of gasoline as fuel. So United States automakers are unwilling to pursue the development of new fuelefficient technologies aggressively. The particular reluctance of the United States automobile industry to do, so, however, could threaten the industry"s future.
Which of the following, if true, would provide the most support for the claim above about the future of the United States automobile industry?
单选题At a certain university, if 50 percent of the people who inquire about admission policies actually submit applications for admission, what percent of those who submit applications for admission enroll in classes at the university?
(1)Fifteen percent of those who submit applications for admission are accepted at the university.
(2)Eighty percent of those who are accepted send a deposit to the university.
单选题Theadditionproblemaboveshowsfourofthe24differentintegersthatcanbeformedbyusingeachofthedigits1,2,3and4exactlyonceineachinteger.Whatisthesumofthese24integers?
单选题For the positive numbers, n, n+1, n+2, n+4 and n+8, the mean is how much greater than the median?
单选题Virginia, Adrienne, and Dennis have taught history for a combined total of 96 years. If Virginia has taught for 9 more years than Adrienne and for 9 fewer years than Dennis, for how many years has Dennis taught?
单选题A certain truck manufacturer must have sales of $4.5 billion to break even this year. If the manufacturer had sales of $ 1.9 billion for the first half of the year, then, to break even for the year, its sales for the second half must be approximately what percent higher than its sales for the first half?
单选题 Now that you've gotten a little more confident, we're going
to give you the opportunity to practice "without the training wheels." When you
want to check your work, you can turn to the solutions at the end. If you aren't
familiar with some of the mathematical concepts, make a note to pay particular
attention to that chapter in this book; this practice set covers a wide range of
topics tested on the GMAT. On all data sufficiency problems,
the answer choices are the same (as you've learned). We've put them here for
your reference. Ａ. Statement (1) ALONE is sufficient, but
statement (2) alone is not sufficient. Ｂ. Statement (2) ALONE
is sufficient, but statement (1) alone is not sufficient. Ｃ.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is
sufficient. Ｄ. EACH statement ALONE is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.
单选题What is the length in meters of a certain rectangular garden? (1)The length of the garden is 6 meters more than twice the width. (2)The length of the garden is 4 times the width.
单选题In the rectangular coordinate system, are the points (r, s) and (u, ν) equidistant from the origin? (1)r+s=1 (2)u=1-r and ν=1-s