已选分类
管理学
单选题If r=23·52·7 and s=22·32·5, which of the following is equal to the greatest common divisor of r and s? (A) 2·5 (B) 22·5 (C) 23·52 (D) 2·3·5·7 (E) 23·32·52·7
单选题Inthefigureabove,RandQarepointsonthex-axis.WhatistheareaofequilateralPQR?(1)ThecoordinatesofpointPare(6,).(2)ThecoordinatesofpointQare(8,0).
单选题A family made a down payment of $75 and borrowed the balance on a set of encyclopedias that cost $400. The balance with interest was paid in 23 monthly payments of $16 each and a final payment of $9. The amount of interest paid was what percent of the amount borrowed? (A) 6% (B) 12% (C) 14% (D) 16% (E) 20%
单选题If xy=-6, what is the value of xy(x+y)? (1)x-y=5 (2)xy2=18
单选题Each of the integers from 0 to 9, inclusive, is written on a separate slip of blank paper and the ten slips are dropped into a hat. If the slips are then drawn one at a time without replacement, how many must be drawn to ensure that the numbers on two of the slips drawn will have a sum of 10?
单选题Astraightpipe1yardinlengthwasmarkedoffinfourthsandalsointhirds.Ifthepipewasthencutintoseparatepiecesateachofthesemarkings,whichofthefollowinggivesallthedifferentlengthsofthepieces,infractionsofayard?
单选题Foranyintegerngreaterthan1,denotestheproductofalltheintegersfrom1ton,inclusive.Howmanyprimenunbersaretherebetweenand,inclusive?(A)None(B)One(C)TWO(D)Three(E)Four
单选题A rectangular circuit board is designed to have width叫inches, perimeter p inches, and area k square inches. Which of the following equations must be true?
单选题Hotco oil burners, designed to be used in asphalt plants, are so efficient that Hotco will sell one to the Clifton Asphalt plant for no payment other than the cost savings between the total amount the asphalt plant actually paid for oil using its former burner during the last two years and the total amount it will pay for oil using the Hotco burner during the next two years. On installation, the plant will make an estimated payment, which will be adjusted after two years to equal the actual cost savings.
Which of the following, if it occurred, would constitute a disadvantage for Hotco of the plan described above?
单选题On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale, the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3?
单选题A researcher studying drug addicts found that, on average, they tend to manipulate other people a great deal more than nonaddicts do. The researcher concluded that people who frequently manipulate other people are likely to become addicts.
Which of the following, if true, most seriously weakens the researcher"s conclusion?
单选题During the nineteenth century, Britain"s urban population increased as its rural population diminished. A historian theorizes that, rather than industrialization"s being the cause, this change resulted from a series of migrations to urban areas, each occasioned by a depression in the agrarian economy. To test this hypothesis, the historian will compare economic data with population census data.
The historian"s hypothesis would be most strongly supported if which of the following were found to be true?
单选题If Pat bought a tennis shirt with matching shorts, what was the cost of the shirt? (1)The total cost of the shirt and shorts was $20. (2)The ratio of the cost of the shirt to the cost of the shorts was 2:3.
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? (A) 11% (B) 16% (C) 27% (D) 37% (E) 58%
单选题Which of the following, if true, would provide most support for concluding from the survey results described above that the use of illegal drugs by people below the age of 20 is declining?
单选题For any positive integer n, n＞1, the "length" of n is the number of positive primes (not necessarily distinct) whose product is n. For example, the length of 50 is 3 since 50=(2)(5)(5) Which of the following integers has length 3?
单选题The participants in a race consisted of 3 teams with 3 runners on each team. A team was awarded 6-n points if one of its runners finished in nth place, where 1≤n≤5. If all of the runners finshed the race and if there were no ties, was each team awarded at least one point? (1)No team was awarded more than a total of 6 points. (2)No pair of teammates finished in consecutive places among the top five places.
单选题What is the probability that events A and B both occur?
(1)The probability that event A occurs is 0.8.
(2)The probability that event B occurs is 0.6.
单选题Ofthefournumbersrepresentedonthenumberlineaboveisrclosesttozero?(1)q=-s(2)-t＜q
单选题A wildlife preserve is being planned for 3,000 rhinoceroses. The preserve is to contain a total of 10,000 acres of watering area, plus 100 acres of grazing area for each rhinoceros. If the number of rhinoceroses is expected to increase by 10 percent, how many thousand acres should the preserve have in order to provide for the increased population?