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PREP07 Test 2
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Unlike battery-powered electric cars, automakers say that cars with fuel cells, which supply them with electricity, can provide driving range and performance similar to the internal combustion engine.
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PREP07 Test 2
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If x and y are positive integers such that x = 8y + 12, what is the greatest common divisor of x and y ?(1) x = 12u, where u is an integer. (2) y = 12z, where z is an integer.
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PREP07 Test 2
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If 0 < x < 1, which of the following inequalities must be true?Ⅰ. $$x^5 < x^3$$ Ⅱ.$$x^4+x^5 < x^3+x^2$$ Ⅲ. $$x^4-x^5 < x^2-x^3$$
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PREP07 Test 2
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Although at one time children's programming had been limited to a few hours a week, now, however, there are at least four cable networks that dedicate themselves entirely to shows produced specifically for children.
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PREP07 Test 2
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At a certain bakery, each roll costs r cents and each doughnut costs d cents. If Alfredo bought rolls and doughnuts at the bakery, how many cents did he pay for each roll? (1) Alfredo paid $5.00 for 8 rolls and 6 doughnuts. (2) Alfredo would have paid $10.00 if he had bought 16 rolls and 12 doughnuts.
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PREP07 Test 2
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If $$(\frac{2}{3})^{n}=(\frac{3}{2})^{2}$$, what is the value of n ?
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PREP07 Test 2
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Both the caribou and the reindeer belong to the species Rangifer tarandus, but after 7,000 years of domestication in Eurasia, reindeer have developed a tendency to circle in tight groups, while caribou tend to spread far and wide.
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PREP07 Test 2
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Is x > 0 ? (1) xy > 0 (2) x + y > 0
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PREP07 Test 2
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If $$(2^x)(2^y) = 8$$ and $$(9^x)(3^y) = 81$$, then (x, y) =
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PREP07 Test 2
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In a blow to those who still harbored the illusion that E-mail exchanges are private, a watchdog group recently uncovered a trick for enabling an interloper to rig an E-mail message so that this person will be privy to any comments that a recipient had added as the message is forwarded to others or sent back and forth.
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PREP07 Test 2
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How much time did it take a certain car to travel 400 kilometers?(1) The car traveled the first 200 kilometers in 2.5 hours. (2) If the car's average speed had been 20 kilometers per hour greater than it was, it would have traveled the 400 kilometers in 1 hour less time than it did.
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PREP07 Test 2
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{-10, -6, -5, -4, -2.5, -1, 0, 2.5, 4, 6, 7, 10} A number is to be selected at random from the set above. What is the probability that the number selected will be a solution of the equation (x - 5)(x + 10)(2x - 5) = 0 ?
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PREP07 Test 2
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The number of plant and animal species that humans are known to have forced to extinction in the last half millennium is over 800.
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PREP07 Test 2
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Critics of the research study claimed that monkeys are different enough from human beings that comparing the two species can be as questionable--or as useless--as comparisons between humans and mice.
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PREP07 Test 2
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Each of the offices in a certain building has a floor area of 200, 300, or 350 square feet. How many offices are on the first floor of the building? (1) There is a total of 9,500 square feet of office floor space on the first floor of the building. (2) Ten of the offices on the first floor have floor areas of 350 square feet each.
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PREP07 Test 2
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For all numbers x such that $$x \neq 1$$, if g(x) is defined by $$g(x)={{x^2+2}\over{x-1}}$$, then ($${{1}\over{g(2)}}$$)($${{1}\over{g(x)}})$$=?
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PREP07 Test 2
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Of the 800 employees of Company X, 70 percent have been with the company for at least ten years. If y of these "long-term" members were to retire and no other employee changes were to occur, what value of y would reduce the percent of "long-term" employees in the company to 60 percent?
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PREP07 Test 2
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Is n divisible by 12 ?(1) $$\frac{n}{6}$$ is an integer.(2) $$\frac{n}{4}$$ is an integer.
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PREP07 Test 2
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Now that so much data travels via light-i.e., is carried in glass fibers rather than by electrical current-one goal of semiconductor research is to develop a silicon chip that can transmit and receive light signals directly, a development that may one day lead to smaller, faster semiconductors.
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PREP07 Test 2
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Do more than 50 percent of the children in a certain group have brown hair? (1) 70 percent of the boys in the group have brown hair. (2) 30 percent of the children in the group are girls with brown hair.
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