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Ready4	Researchers of the Antikythera mechanism claim the retrieval of this ancient Greek analog computer dating to circa 205–100 B.C.E. suggest their development of complex gear systems, the demonstration of meticulous workmanship, and achievement of remarkably exact and accurate calculations happened several centuries, almost a millennium, before a European device of similar complexity appeared.
Ready4	In spite of the growing number of countries committing to limits on production of greenhouse gases and dumping of toxic chemicals, the decrease in atmospheric emissions and polluted bodies of water have not accelerated to a proportional degree.
Ready4	Not fewer than 41 feet deep and 31 feet across, but it spanned a critical 48 miles of dense and treacherous Central American jungle, the Panama Canal linked the Pacific and Atlantic Oceans, creating a vital passage for international maritime trade as well as significantly safer oceanic travel.
Ready4	As an artist and, more meaningfully, as a teacher of painting and drawing, Fernand Cormon was one of the most transformative artists of the twentieth century, who taught several artists including Henri de Toulouse-Lautrec and Vincent van Gogh.
Ready4	Consumers are often disappointed by the bland taste of the fruits and vegetables found at most supermarket chains. A professor in Florida recently developed a new type of tomato that a panel of 500 experts ranked the best tomato they had ever tasted. However, consultants concluded that selling the new tomato, which is smaller than other tomato varieties, would not result in increased revenues for supermarket chains. Which of the following, if true, does most to justify the consultants’ conclusion?
Ready4	The purple skydrop is a rare type of flower. It is star-shaped and is pollinated primarily by black-winged sparrows. Because it requires direct sunlight, its range in the past has been limited to a few open meadows within Sylvan State Forest. Recently, however, hundreds of trees in Sylvan Forest were destroyed by a blight and were removed by park rangers. If the blight continues to spread, it is probable that the range of the purple skydrop will expand into the new open meadows created by the removal of the trees. Which of the following, if true, most seriously weakens the argument?
Ready4	A chemical spill in Oak City that took place in February tainted the drinking water of nearby communities. Some scientists claim that, because underground aquifers are interconnected, more distant water supplies are also at risk of contamination. This claim is not undermined by the fact that a careful study of the regional water table that same month detected no increase in contaminant levels beyond the immediate vicinity of Oak City, because _______.
Ready4	The Strongbridge Hardwood Company is a major employer in the Strongbridge area. New environmental regulations have recently made it so expensive for companies to log in the area that the Strongbridge Hardwood Company will have to move its operations to another state if it does not receive the financial assistance it has requested from the local government. In order to prevent a dramatic increase in local unemployment, the Strongbridge government is considering granting the company’s request. Which of the following would be most important for the Strongbridge company to determine before making the decision?
Ready4	Dengue fever, a viral disease, is common in humid, tropical climates, and it has become more prevalent as flooding has expanded the habitat of the mosquitoes that are the virus’s carriers for much of its life cycle.
Ready4	Meteorologists announced that the severe weather warning would remain in effect because no perceptive reduction in the strength of the hurricane occurred after it made landfall earlier that day.
Ready4	The author mentions saloons in in order to
Ready4	On the circle above with center $O$ , the length of arc $PQR$ is $12 \pi$ . What is the circumference of the circle?
Ready4	What is the value of $s^2-t^2$ ? (1) $(s+t)(s-t)=3$ (2) $s-t=1$
Ready4	People who consume caffeine within six hours of going to sleep are shown to have less restful sleep than those who abstain from caffeine. Short daytime naps usually improve performance and alertness in adults. However, study subjects who consume caffeine immediately before a short afternoon nap performed better on tests and felt more alert after the nap than others who simply took naps. Which of the following, if true, best reconciles the apparent discrepancy described above?
Ready4	The number of cars present at a particular time was measured at 3,999 different locations on Tuesday and on Wednesday. The number of locations that had more cars on Wednesday was 15% higher than the number of locations that had more cars on Tuesday. No location had the same number of cars on both days. How many of the locations had more cars on Tuesday?
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Ready4	If $a$ , $b$ , and $c$ are all positive integers and $a\neq c$ , is $\frac{b}{ac}$ an integer? (1) $ba=5$ (2) $b=a+c$
Ready4	The outer diameter of a copper pipe is 10 units, and the diameter of the inside of the pipe is 6 units. If the copper pipe is 3 units long, how much copper (in cubic units) was required to make this pipe?
Ready4	Each of 16 individuals is to be given an identifying code consisting of one or more digits. Within each individual’s code, all digits must be distinct and in ascending order. What is the minimum number of distinct digits required such that no two individuals have the same code?