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OG16 OG17
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Today Rebecca, who is 34 years old, and her daughter, who is 8 years old, celebrate their birthdays. How many years will pass before Rebecca's age is twice her daughter's age?
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Scientist long believed that two nerve cluster in the human hypothalamus, called suprachiasmatic nuclei (SCNs), were what controlled our circadian rhythms. Those rhythms are the biological cycles that recur approximately every 24 hours in synchronization with the cycle of sunlight and darkness caused by Earth's rotation. Studies have demonstrated that in some animals, the SCNs control daily fluctuations in blood pressure, body temperature, activity level, and alertness, as well as the nighttime release of the sleep-promoting agent melatonin. Furthermore , cells in the human retina dedicated to transmitting information about light level to the SCNs have recently been discovered.Four critical genes governing circadian cycles have been found to be active in every tissue, however, not that the SCNs, of flies, mice, and humans. In addition, when laboratory rats that usually ate at will were fed only once a day, peak activity of a clock gene in their livers shifted by 12 hours, whereas the same clock gene in the SCNs remained synchronized with light cycles. While scientists do not dispute the role of the SCNs in controlling core functions such as the regulation of body temperature and blood pressure, scientists now believe that circadian clocks in other organs and tissues may respond to external cues other than light – including temperature changes – that recur regularly 24 hours.
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OG17 OG18 OG19 OG20 OG2022
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Especially in the early years, new entrepreneurs may need to find resourceful ways, like renting temporary office space or using answering services, that make their company seem large and more firmly established than they may actually be.
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OG17 OG18 OG19 OG20 OG2022
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As criminal activity on the Internet becomes more and more sophisticated, not only are thieves able to divert cash from company bank accounts, they can also pilfer valuable information such as business development strategies, new product specifications, and contract bidding plans, and sell the data to competitors.
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GWD
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Which of the following most logically completes the argument below?According to promotional material published by the city of Springfield, more tourists stay in hotels in Springfield than stay in the neighboring city of Harristown. A brochure from the largest hotel in Harristown claims that more tourists stay in that hotel than stay in the Royal Arms Hotel in Springfield. If both of these sources are accurate, however, the county's "Report on Tourism" must be in error in indicating that _______.
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GWD
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Criminologist: Some legislators advocate mandating a sentence of life in prison for anyone who, having twice served sentences for serious crimes, is subsequently convicted of a third serious crime. These legislators argue that such a policy would reduce crime dramatically, since it would take people with a proven tendency to commit crimes off the streets permanently. What this reasoning overlooks, however, is that people old enough to have served two prison sentences for serious crimes rarely commit more than one subsequent crime. Filling our prisons with such individuals would have exactly the opposite of the desired effect, since it would limit our ability to incarcerate younger criminals, who commit a far greater proportion of serious crimes.In the argument as a whole, the two boldfaced portions play which of the following roles?
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OG12
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 In the figure above, is CD > BC ?(1) AD = 20(2) AB = CD
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OG16 OG17 OG18 OG19 OG20 OG2022
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The price of a coat in a certain store is $500. If the price of the coat is to be reduced by $150, by what percent is the price to be reduced?
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OG16 OG17 OG18 OG19 OG20 OG2022
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If the average (arithmetic mean) of the four numbers 3, 15, 32, and (N + 1) is 18, then N =
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OG16 OG17 OG18 OG19 OG20 OG2022
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 The figure above shows a path around a triangular piece of land. Mary walked the distance of 8 miles from P to Q and then walked the distance of 6 miles from Q to R. If Ted walked directly from P to R, by what percent did the distance that Mary walked exceed the distance that Ted walked?
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OG16 OG17 OG18 OG19 OG20 OG2022
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A manufacturer of a certain product can expect that between 0.3 percent and 0.5 percent of the units manufactured will be defective. If the retail price is $2,500 per unit and the manufacturer offers a full refund for defective units, how much money can the manufacturer expect to need to cover the refunds on 20,000 units?
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OG16 OG17 OG18 OG19 OG20 OG2022
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 A flat patio was built alongside a house as shown in the figure above. If all angles are right angles, what is the area of the patio in square feet?
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OG16 OG17 OG18 OG19 OG20 OG2022
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The positive two-digit integers x and y have the same digits, but in reverse order. Which of the following must be a factor of x + y?
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OG17 OG18 OG19 OG20 OG2022
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If the positive integer n is added to each of the integers 69,94, and 121, what is the value of n?(1) 69 + n and 94 + n are the squares of two consecutive integers.(2) 94 + n and 121 + n are the squares of two consecutive integers.
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OG17
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Jazz and blues recordings accounted for 6 percent of the $840 million revenue from the sales of recordings in Country Y in 2000. What was the revenue from the sales of jazz and blues recordings in Country Y on 1998?(1) Jazz and blues recordings accounted fro 5 percent of the revenue from the sales of recordings on Country Y on 1998.(2) The revenue from the sales of jazz and blues recordings in Country Y increased by 40 percent from 1998 to 2000.
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OG17 OG18 OG19 OG20 OG2022
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If x is a positive integer, what is the value of $$\sqrt{x+24}$$ - $$\sqrt{x}$$ ?(1) $$\sqrt{x}$$ is an integer.(2) $$\sqrt{x+24}$$ is an integer.
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OG17 OG18 OG19 OG20 OG2022
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The only articles of clothing in a certain closet are shirts, dresses, and jacket. The ratio of the number of shirts to the number of dresses to 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 inthe closet is less than 30.(2) The total number of shirts and dresses in the closet is 26.
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PREP07 Test 1
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In the late 1980s,the population of sea otters in the North Pacific began to decline.There are two plausible explanations for the decline:predation,possibly by killer whales,or disease.Of these two,disease is the more likely,since a concurrent sharp decline in populations of seals and sea lions is believed to have been caused by disease,and diseases that infect these creatures are likely to be able to infect sea otters also.Which of the following,if true,most seriously weakens the reasoning?
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OG17 OG18 OG19 OG20 OG2022
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Previously, Autoco designed all of its cars itself and then contracted with specialized parts suppliers to bulid parts according to its specifications. Now it plans to include its suppliers in designing the parts they are to build. Since many parts suppliers have more designers with specialized experience than Autoco has, Autoco expects this shift to reduce the overall time and cost of the design of its next new car.Which of the following, if true, most strongly supports Autoco's expectation?
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PREP2012
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Electric utilities pay less for low-quality coal per ton delivered than for high-quality coal. Yet more low-quality coal than hogn-quality coal must be burned to generate the same amout of electricity. Moreover, per ton of coal burned, low-quality coal generates more ash than does high-quality coal, and the disposal of ash is becoming more and more expensive.The considerations above, if true, most strongly support which of the following chaims?
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