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PREP07 Test 2	Of the people who attended a workshop, 60 percent were teachers and some of the teachers were teachers of language arts. What percent of the people who attended the workshop were teachers of language arts?(1) 200 people attended the workshop.(2) 72 of the teachers who attended the workshop were not teachers of language arts.
PREP07 Test 2	It can be inferred from the passage that which of the following is true about the salinity and temperatures of the highest and lowest water layers in a typical solar pond?
PREP07 Test 2	A certain list of 100 data has an average (arithmetic mean) of 6 and a standard deviation of d, where d is positive. Which of the following pairs of data, when added to the list, must result in a list of 102 data with standard deviation less than d ?
PREP07 Test 2	One of the earliest known birds with a beak and contour feathers, Confuciusornis sanctus, with large clawlike "thumbs" on its wings, which probably helped them to climb up to a launching position for flight.
PREP07 Test 2	An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984. Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.Which of the following statements, if true, most seriously weakens the argument above?
PREP07 Test 2	According to the passage, the growth of algae was considered a threat to the success of the artificial pond near the Dead Sea because the algae
PREP07 Test 2	Jane walked for 4 miles. What was her average speed for the first 2 miles?(1) Jane's average speed for the 4 miles was 3.2 miles per hour. (2) It took Jane 15 minutes longer to walk the second 2 miles than it took her to walk the first 2 miles.
PREP07 Test 2	If Sally drives at a constant speed of 50 miles per hour, how many minutes will be required for her to drive 10 miles?
PREP07 Test 2	Three out of every four automobile owners in the United States also own a bicycle.
PREP07 Test 2 GWD	Most household appliances use electricity only when in use. Many microwave ovens, however, have built-in clocks and so use some electricity even when they are not in use. The clocks each consume about 45 kilowatt-hours per year. Therefore, households whose microwave oven has no built-in clock use 45 kilowatt-hours per year less, on average, than do comparable households whose microwave oven is otherwise similar but has a built-in clock.Which of the following is an assumption on which the argument depends?
PREP07 Test 2	Which of the following, if true, would seriously undermine the validity of the conclusions drawn from the experiment described in the last paragraph of the passage?
PREP07 Test 2	Is xy + xz = 0 ?(1) x = 0(2) y + z = 0
PREP07 Test 2	If a = 1 and $\frac{(a-b)}{c}=1$ , which of the following is NOT a possible value of b ?
PREP07 Test 2	In the mid-1920s the Hawthorne Works of the Western Electric Company was the scene of an intensive series of experiments that would investigate changes in working conditions as to their effects on workers' performance.
PREP07 Test 2	Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.Which of the following, if true, most seriously weakens the argument?
PREP07 Test 2 PREP08 Test 1	The primary purpose of the passage is to
PREP07 Test 2	All points (x, y) that lie below the line l, shown above, satisfy which of the following inequalities?
PREP07 Test 2	Is \|k \| = 2 ?(1) $k^2 = 4$ (2) k = \|2\|
PREP07 Test 2 GWD	The single-family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet.
PREP07 Test 2	When an airplane is taken out of service for maintenance, it is often repainted as well, and during the repainting no other maintenance work can be done on the plane. In order to reduce maintenance time, airline officials are considering using a new nontoxic plastic film instead of paint. The film takes just as long to apply as paint does, but many other maintenance tasks can be carried out at the same time.Which of the following, if true, is further evidence that using the film will help the airline officials achieve their goal?