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OG19-数学分册
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On a certain day, a bakery produced a batch of rolls at a total production cost of $300. On that day,$$\frac{4}{5}$$ of the rolls in the batch were sold, each at a price that was 50 percent greater than the average (arithmetic mean) production cost per roll. The remaining rolls in the batch were sold the next day, each at a price that was 20 percent less than the price of the day before. What was the bakery's profit on this batch of rolls?
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OG19-数学分册
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A set of numbers has the property that for any number t in the set, $$t + 2$$ is in the set. If -1 is in the set, which of the following must also be in the set?
I. -3
II. 1
Ill. 5
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OG19-数学分册
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A couple decides to have 4 children. If they succeed in having 4 children and each child is equally likely to be a boy or a girl, what is the probability that they will have exactly 2 girls and 2 boys?
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OG19-数学分册
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Does 2x + 8 = 12 ?
(1) 2x + 10 = 14
(2) 3x+8= 14
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OG19-数学分册
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If M is a set of consecutive even integers, is O in set M?
(1) -6 is in set M.
(2) -2 is in set M.
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OG19-数学分册
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Rita's monthly salary is $$\frac{2}{3}$$ Juanita's monthly salary. What is their combined monthly salary?
(1) Rita's monthly salary is $4,000.
(2) Either Rita's monthly salary or Juanita's monthly salary is $6,000.
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OG19-数学分册
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If p and q are positive, is $$\frac{p}{q}$$ less than 1 ?
(l) p is less than 4.
(2) q is less than 4.
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OG19-数学分册
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How many hours would it take Pump A and Pump B working together, each at its own constant rate, to empty a tank that was initially full?
(1) Working alone at its constant rate, Pump A would empty the full tank in 4 hours 20 minutes.
(2) Working alone, Pump B would empty the full tank at its constant rate of 72 liters per minute.
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OG19-数学分册
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What is the value of the integer N?
(1) 101 < N< 103
(2) 202 < 2N < 206
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OG19-数学分册
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In a school that had a total of 600 students enrolled in the junior and senior classes, the students contributed to a certain fund. If all of the juniors but only half of the seniors contributed, was the total amount contributed more than $ 740?
(1) Each junior contributed $1 and each senior who contributed gave $3.
(2) There were more juniors than seniors enrolled in the school.
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OG19-数学分册
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How much did credit-card fraud cost United States banks in year X to the nearest $10 million?
( 1) In year X, counterfeit cards and telephone and mail-order fraud accounted for 39 percent of the total amount that card fraud cost the banks.
(2) In year X, stolen cards accounted for $158.4 million, or 16 percent, of the total amount that credit-card fraud cost the banks.
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OG19-数学分册
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In the xy-plane, circle C has center (1,0) and radius 2. If line k is parallel to the y-axis, is line k tangent to circle C?
(1) Line k passes through the point (-1,0).
(2) Line k passes through the point (-1,-1).
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OG19-数学分册
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For all x, the expression x* is defined to be ax+ a, where a is a constant. What is the value of 2 * ?
(1) 3*=2
(2) 5* = 3
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OG19-数学分册
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The symbol △ represents which one of the following operations: addition, subtraction, or multiplication?
(1) $$a △ (b △ c)\neq a △(c △b)$$ for some numbers a, b, and c.
(2) $$a △(b △ c) \neq(a △b)△c$$ for some numbers a, b, and c.
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OG19-数学分册
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In the figure shown, lines k and mare parallel to each other. Is $$x = z$$?
(1) $$x = w$$
(2) $$y= 180- w$$
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OG19-数学分册
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If k and £ are lines in the xy-plane, is the slope of k less than the slope of £ ?
(1) The x-intercept of line k is positive, and the x-intercept of line £ is negative.
(2) Lines k and £ intersect on the positive y-axis.
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OG19-语文分册 OG20-语文分册
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A major health insurance company in Lagolia pays for special procedures prescribed by physicians only if the procedure is first approved as "medically necessary" by a company-appointed review panel. The rule is intended to save the company the money it might otherwise spend on medically unnecessary procedures. The company has recently announced that in order to reduce its costs, it will abandon this rule.
Which of the following, if true, provides the strongest justification for the company's decision?
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OG19-语文分册 OG20-语文分册
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Which of the following most logically completes the market forecaster's argument?
Market forecaster: The price of pecans is high when pecans are comparatively scarce but drops sharply when pecans are abundant. Thus, in high-yield years, growers often store part of their crop in refrigerated warehouses until after the next year's harvest, hoping for higher prices then. Because of bad weather, this year's pecan crop will be very small. Nevertheless,
pecan prices this year will not be significantly higher than last year, since _________.
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OG19-语文分册 OG20-语文分册
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Which of the following most logically completes the argument below?
Within the earth's core, which is iron, pressure increases with depth. Because the temperature at which iron melts increases with pressure, the inner core is solid and the outer core is molten. Physicists can determine the melting temperature of iron at any given pressure and the pressure for any given depth in the earth. Therefore, the actual temperature at the boundary of the earth's outer and inner cores-the melting temperature of iron there-can be determined, since ______.
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OG19-语文分册 OG20-语文分册
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Which of the following, if true, would provide the most support for Castaneda's explanation of the "stereotypical plot" mentioned in the lines 18-19?
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