题库 | 考满分，百万出国党的口碑之选。

序号	题目内容
142	On the number line shown, the tick marks are equally spaced. What is the value of y - x ?
143	Of the 50 employees of a certain company, 30 earn an average (arithmetic mean) salary of $30,000, 15 earn an average salary of $40,000, and 5 earn an average salary of $60,000. What is the average salary earned by the employees of this company?
144	The table shows the quantities of eggs, flour, and sugar used by a certain baker to make one cake of each of the three different types. If the baker had 24 eggs, 30 cups of flour, and 10 cups of sugar available and had to make 2 angel food cakes and 1 devil's food cake, what is the maximum number of pound cakes that the baker could make with the remaining ingredients?
145	At 12:00 noon, the temperature in a certain storage room was 64. If the temperature in the storage room decreased at a constant rate of 2 per hour for the next 8 hours, what was the temperature in the storage room at 8:00 in the evening?
146	In a certain group of 10 members, 4 members teach only French and the rest teach only Spanish or German. If the group is to choose a 3-member committee, which must have at least 1 member who teaches French, how many different committees can be chosen?
147	Last semester an assistant was paid a total of $800 for grading papers in a class of 37 students. If each student handed in 7 papers and the assistant graded all of these papers, then, to the nearest whole dollar, the assistant's pay per paper graded was
148	Amy's grade was the 90th percentile of the 80 grades for her class. Of the 100 grades from another class, 19 were higher than Amy's, and the rest were lower. If no other grade was the same as Amy's grade, then Amy's grade was what percentile of the grades of the two classes combined?
149	To determine her state income tax last year, Elena computed 5 percent of her gross income, rounded the resulting figure down to the nearest $100, and subtracted $50 for each dependent that she claimed. If Elena's gross income was $34,500 and she claimed 2 dependents, how much did she determine her state income tax to be?
150	The area of a square garden is A square feet and the perimeter is P feet. If A = 2P + 9, what is the perimeter of the garden, in feet?
151	Which of the following is closest to $$\sqrt{8^2-4^2}$$
152	Square S is inscribed in circle T. If the perimeter of S is 24, what is the circumference of T ?
153	At a certain supplier, a machine of type A costs $20,000 and a machine of type B costs $50,000. Each machine can be purchased by making a 20 percent down payment and repaying the remainder of the cost and the finance charges over a period of time. If the finance charges are equal to 40 percent of the remainder of the cost, how much less would 2 machines of type A cost than 1 machine of type B under this arrangement?
154	Bobby bought two shares of stock, which he sold for $96 each. If he had a profit of 20 percent on the sale of one of the shares but a loss of 20 percent on the sale of the other share, then on the sale of both shares combined Bobby had
155	A certain brand of gasoline costs $1.25 per gallon. Using this gasoline, if a car averages 30 miles to the gallon, what is the cost of the gasoline needed for the car to travel 120 miles?
156	A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. If each dessert platter contains an equal number of kinds of cheese and kinds of fruit, how many different dessert platters could the restaurant offer?
157	If k and t are integers and $$k^2 - t^2$$ is an odd integer, which of the following must be an even integer?I. k+t+2II. $$k^2+2kt+t^2$$III. $$k^2+t^2$$
158	If x and y are positive, which of the following must be greater than $${1}\over{\sqrt{x+y}}$$?I. $${\sqrt{x+y}}\over{2x}$$II. $$(\sqrt{x}+ {\sqrt{y})}\over{(x+y)}$$III. $${(\sqrt{x}- \sqrt{y})}\over{(x+y)}$$
159	What is the greatest prime factor of $${4}^{17} - {2}^{28}$$ ?
160	An automobile manufacturer offers a station wagon with either a 6-cylinder engine or a 4-cylinder engine and with either a manual transmission or an automatic transmission. A trailer hitch is also offered, but only on a station wagon with a 6-cylinder engine. How many combinations of the five options listed does the manufacturer offer for its station wagon?
161	The temperature of a certain cup of coffee 10 minutes after it was poured was 120 degrees Fahrenheit. If the temperature F of the coffee t minutes after it was poured can be determined by the formula $$F = 120(2^{-at}) + 60$$, where F is in degrees Fahrenheit and a is a constant, then the temperature of the coffee 30 minutes after it was poured was how many degrees Fahrenheit?

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题目内容

142