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OG18-数学分册
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In which of the following pairs are the two numbers reciprocals of each other?I. 3 and $$\frac{1}{3}$$II. $$\frac{1}{17}$$ and $$-\frac{1}{17}$$III. $$\sqrt{3}$$ and $$ \frac{\sqrt{3}}{3}$$
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OG18-数学分册
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The number 2 ‒ 0.5 is how many times the number 1 ‒ 0.5 ?
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OG18-数学分册
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The toll T, in dollars, for a truck using a certain bridge is given by the formula T = 1.50 + 0.50(x – 2), where x is the number of axles on the truck. What is the toll for an 18-wheel truck that has 2 wheels on its front axle and 4 wheels on each of its other axles?
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OG18-数学分册
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$$\frac{(39,897)(0.0096)}{198.76}$$ is approximately
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OG18-数学分册
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$$\sqrt{16+16}$$
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OG18-数学分册
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Points A, B, C, and D, in that order, lie on a line. If AB = 3 cm, AC = 4 cm, and BD = 6 cm, what is CD, in centimeters?
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OG18-数学分册
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 As shown in the diagram above, a lever resting on a fulcrum has weights of $$w_{1} $$ pounds and $$w_{2}$$ pounds, located $$d_{1}$$ feet and $$d_{2}$$ feet from the fulcrum. The lever is balanced and $$w_{1}d_{1} = w_{2}d_{2}$$. Suppose $$w_{1}$$ is 50 pounds and $$w_{2}$$ is 30 pounds. If $$d_{1}$$ is 4 feet less than $$d_{2}$$, what is $$d_{2}$$, in feet?
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OG18-数学分册
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When 24 is divided by the positive integer n, the remainder is 4. Which of the following statements about n must be true?I. n is even.II. n is a multiple of 5.III. n is a factor of 20.
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OG18 OG19 OG20 OG2022
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Every object in a box is either a sphere or a cube,and every object in the box is either red or green. How many objects are in the box? (1) There are six cubes and five green objects in the box. (2) There are two red spheres in the box.
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OG18 OG19 OG20 OG2022
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If x and y are positive integers, is xy even? (1) $$x^{2} + y^{2} - 1$$ is divisible by 4. (2) x+y is odd.
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OG18 OG19 OG20
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 According to the table shown, the estimated number of home-schooled students in State A approximately what percent greater than the number in State D?
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OG18 OG19 OG20 OG2022
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If $$n = 3^{8} - 2^{8}$$, which of the following is NOT a factor of n ?
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OG18
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The quotient when a certain number is divide by $$\frac{2}{3} is \frac{9}{2}$$. What is the number?
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OG18 OG19 OG20 OG2022
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Which of the following is greatest?
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OG18 OG19 OG20 OG2022
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Company Q plans to make a new product next year and sell each unit of this new product at a selling price of $2. The variable costs per unit in each production run are estimated to be 40% of the selling price, and the fixed cost of each production run are estimated to be $5,040. Based on these estimated costs, how many units of the new product will Company Q need to make and sell in order for their revenue to equal their total costs for each production run?
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OG18 OG19 OG20 OG2022
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Al and Ben are drivers for SD Trucking Company. One snowy day, Ben left SD at 8:00 a.m. heading east and Al left SD at 11:00 a.m. heading west. At a particular time later that day, the dispatcher retrieved data from SD's vehicle tracking system. The data showed that, up to that time, Al had averaged 40 miles per hour and Ben had averaged 20 miles per hour. It also showed that Al and Ben had driven a combined total of 240 miles. At what time did the dispatcher retrieve data from the vehicle tracking system?
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OG18 OG19 OG20 OG2022
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Last week Chris earned x dollars per hour for the first 40 hours worked plus 22 dollars per hour for each hour worked beyond 40 hours. If last week Chris earned a total of 816 dollars by working 48 hours, what is the value of x ?
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In their study of whether offering a guarantee of service quality will encourage customers to visit a particular restaurant, Tucci and Talaga have found that the effect of such guarantees is mixed. For higher-priced restaurants, there is some evidence that offering a guarantee increases the likelihood of customer selection, probably reflecting the greater financial commitment involved in choosing an expensive restaurant. For lower-priced restaurants, where one expects less assiduous service, Tucci and Talaga found that a guarantee could actually have a negative effect: a potential customer might think that a restaurant offering a guarantee is worried about its service. Moreover, since customers understand a restaurant`s product and know what to anticipate in terms of service, they are empowered to question its quality. This is not generally true in the case of skilled activities such as electrical work, where, consequently, a guarantee might have greater customer appeal. For restaurants generally, the main benefit of a service guarantee probably lies not so much in customer appeal as in managing and motivating staff. Staff members would know what service standards are expected of them and also know that the success of the business relies on their adhering to those standards. Additionally, guarantees provide some basis for defining the skills needed for successful service in areas traditionally regarded as unskilled, such as waiting tables.
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OG18 OG19 OG20 OG2022
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[line:8:enable] Which of the following can be inferred from the passage concerning the environmentalists mentioned in line 8?
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OG19 OG20 OG2022
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The symbol $$\Delta$$ denotes one of the four arithmetic operations: subtraction, multiplication, or division. If 6 $$\Delta$$ 3 $$\le$$ 3, which of the following must be true? I. 2 $$\Delta$$ 2=0 II. 2 $$\Delta$$ 2=1 III. 4 $$\Delta$$ 2=2
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