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PREP07 Test 2 In a certain year the United Nations' total expenditures were $1.6 billion. Of this amount, 67.8 percent was paid by the 6 highest-contributing countries, and the balance was paid by the remaining 153 countries. Was Country X among the 6 highest-contributing countries?(1) 56 percent of the total expenditures was paid by the 4 highest-contributing countries, each of which paid more than Country X. (2) Country X paid 4.8 percent of the total expenditures.
Magoosh At the beginning of January 2003, Lisa invested $10,000 in an account that collected interest, compounding monthly. Assume the annual percentage rate of interest remained constant. She withdrew the money, with interest, at the end of December, 2008. What was the annual percentage of interest paid on this account?Statement #1: Lisa earned $61.83 in interest in November, 2003.Statement #2: At the end of December, 2008, Lisa had gained a total of $4176.25 in interest.
OG19-数学分册 Last year $$\frac{3}{5}$$ of the members of a certain club were males. This year the members of the club include all the members from last year plus some new members. Is the fraction of the members of the club who are males greater this year than last year? (1) More than half of the new members are male. (2) The number of members of the club this year is $$\frac{6}{5}$$ the number of members last year.
排列组合 A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are to be drawn simultaneously from the box. If n of the bulbs in box are defective, what is the value of n?(1)The probability that the two bulbs to be drawn will be defective is $$\frac 1 {15}$$.(2)The probability that one of the bulbs to be drawn will be defective and the other will not be defective is $$\frac 7 {15}$$.
GWD PREP08 Test 1 Of patients over 65 years old who survived coronary bypass surgery-a procedure widely prescribed for people with heart disease-only 75 percent benefited from the surgery. Thus it appears that for one in four such patients, the doctors who advised them to undergo this surgery, with its attendant risks and expense, were more interested in an opportunity to practice their skills and in their fee than in helping the patient.Which of the following, if true, most seriously undermines the argument?
For a week Raymond is paid at the rate of x dollars per hour for the first 40 hours he works and y dollars per hour for the hours worked in excess of 40 hours. What is the value of y?(1) If Raymond works 46 hours in one week, he will earn $416.50.(2) Raymond's hourly rate for the hours worked in excess of 40 hours per week is 1.5 times his hourly rate for the first 40 hours.
GWD The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoids from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.Which of the following is an assumption on which the argument depends?
PREP07 Test 2 Ann bought five different kinds of fruit: apples, oranges, pears, mangoes, and bananas. If the number of apples that Ann bought was twice the number of oranges and if the number of pears that Ann bought was the same as the number of apples and oranges combined, what fraction of the total number of pieces of fruit that Ann bought were pears? (1) Ann bought a total of 18 pieces of fruit. (2) Ann bought 5 bananas.
Ready4

The shaded portion of the rectangle shown above represents a section that will be cut from a piece of paper. If the area to be cut is square inches and , then equals

C13      Women's organized movements, propelled by their belief in moral and social progress, were the driving forces behind the temperance movement in the United States at the dawn of the twentieth century. Though still embroiled in the struggle for suffrage, women won a major political victory with the passage of the Eighteenth Amendment, which prohibited the manufacture and distribution of alcohol. The significance of the legislation, however, extended beyond women's movements (composed largely of white, middle- to upper-class women) and their stated goals. To the temperance reformers, alcohol use led only to abuse and to the destruction of families, but, as several historians have recently pointed out, opponents of this view were a diverse group, as the roles and effects of alcohol consumption varied among regions and communities. Saloons, for instance, may well have been sites of dissolution and debt in some of the towns of the American West, but given the cramped conditions of the tenement quarters in which so many immigrants of the urban Northeast were forced to live, men, women, and even children relied on such locations as social gathering places. Yet even those reformers purporting to act in these very families' interests were generally unable to understand the cultural significance and benefits of alcohol and other so-called vices. Although little evidence supports any anti-immigrant or anti-Catholic constructions of the Prohibition movement, it certainly suffered from a certain myopia towards values outside the particularities of the upper-middle-class, Protestant worldview.
C13

     Finzer predicts that the possibilities for medical research could be expanded through a strategic deployment of the data-gathering and -analysis technologies now becoming available. Currently, huge amounts of data are already being generated for each patient—raising hopes for the possibility of highly personalized medicine—as well as by clinical studies and other methods that promise to allow comparison across populations. Although data storage and access present security and privacy concerns, Finzer points out that the benefits far outweigh the risks, which can be mitigated. Both local and internet-based storage solutions have been proposed for minimizing the possibility of patient data theft.

     Finzer hopes not only that data will be gathered and stored but also that the medical community will recognize the need for more medically-trained data scientists to analyze the data. Often medical researchers simply employ a computer scientist with little medical knowledge to perform specific analysis-related tasks. Results produced using this method are likely to overlook important factors, correlations, or anomalies in the data. A closer collaboration between medical and data science, Finzer says, would allow researchers to fully exploit the possibilities the vast amounts of available data present by increasing understanding in the medical and data science fields of how data is organized and what it implies, respectively, allowing better collaboration on projects where the two are strongly intertwined. For example, computer modeling could speed or improve clinical trials of treatments in humans. The field of genetics also routinely employs computer models.

Ready4

     Finzer predicts that the possibilities for medical research could be expanded through a strategic deployment of the data-gathering and -analysis technologies now becoming available. Currently, huge amounts of data are already being generated for each patient—raising hopes for the possibility of highly personalized medicine—as well as by clinical studies and other methods that promise to allow comparison across populations. Although data storage and access present security and privacy concerns, Finzer points out that the benefits far outweigh the risks, which can be mitigated. Both local and internet-based storage solutions have been proposed for minimizing the possibility of patient data theft.

     Finzer hopes not only that data will be gathered and stored but also that the medical community will recognize the need for more medically-trained data scientists to analyze the data. Often medical researchers simply employ a computer scientist with little medical knowledge to perform specific analysis-related tasks. Results produced using this method are likely to overlook important factors, correlations, or anomalies in the data. A closer collaboration between medical and data science, Finzer says, would allow researchers to fully exploit the possibilities the vast amounts of available data present by increasing understanding in the medical and data science fields of how data is organized and what it implies, respectively, allowing better collaboration on projects where the two are strongly intertwined. For example, computer modeling could speed or improve clinical trials of treatments in humans. The field of genetics also routinely employs computer models.

Ready4

The figure below shows a square inscribed in a circle with a radius of . What is the area of the shaded region?

Ready4

At a certain school, the ratio of the number of five-year-olds to the number of nine-year-olds is 12 to 5, and the ratio of the number of four-year-old's to the number of five-year old's is 3 to 4. If the ratio of the number of eight-year-olds to the number of nine-year-olds is 3 to 2, what is the ratio of the number of four-year-olds to the number of eight-year-olds?

Ready4

Within a legislative body, the ratio of the number of women to the number of men was  After 20 women and 10 men were added to the body, the ratio of the number of women to the number of men was . After these additions, how many more members of the legislative body were men than women?

Ready4

A certain right triangle has side lengths , , and , where . If the area of this triangular region is 50, which of the following indicates all of the possible values of ?

Ready4

If  and  represent the length and width, respectively, of a rectangle, then what is the perimeter?

(1)

(2)

GWD PREP08 Test 2 It is theoretically possible that bacteria developed on Mars early in its history and that some were carried to Earth by a meteorite. However, strains of bacteria from different planets would probably have substantial differences in protein structure that would persist over time, and no two bacterial strains on Earth are different enough to have arisen on different planets. So, even if bacteria did arrive on Earth from Mars, they must have died out.The argument is most vulnerable to which of the following criticisms?
OG21 OG2022 The profit P, in dollars, for any given month at a certain company is defined by P = I - C, where I represents total income, in dollars, and C represents total costs, in dollars, for the month. For each of the first 4 months of the year, C = I + 32,000; and for each of the next 3 months, I = C + 36,000. If I = C + 10,000 for each of the 5 remaining months of the year, what was the company's total profit for the 12-month year?
Magoosh The members of the United States Marine Corps (USMC) are famed for their intense devotion to one another. The Marine motto "Semper Fidelis" (Latin, "Always Faithful") is taken to connote, among other things, the lifelong devotion a Marine has to his or her comrades in the corps. Psychologists who study cohesion among groups have concluded that the USMC creates this intense bond through its unique Recruit Training program.Which of the following, if true, most helps to justify the psychologists' position?
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