题库 | 考满分，百万出国党的口碑之选。

序号	题目内容
81	What is the value of integer n ?(1)n(n+1) = 6(2)$${2}^{2n}$$ = 16
82	What is the total number of coins that Bert and Claire have?(1) Bert has 50 percent more coins than Claire.(2) The total number of coins that Bert and Claire have is between 21 and 28.
83	A telephone station has x processors, each of which can process a maximum of y calls at any particular time, where x and y are positive integers. If 500 calls are sent to the station at a particular time, can the station process all of the calls?(1) x = 600(2) 100 < y < 200
84	On a certain nonstop trip, Marta averaged x miles per hour for 2 hours and y miles per hour for the remaining 3 hours. What was her average speed, in miles per hour, for the entire trip?(1) 2x + 3y = 280(2) y = x + 10
85	Three machines, K, M, and P, working simultaneously and independently at their respective constant rates, can complete a certain task in 24 minutes. How long does it take Machine K, working alone at its constant rate, to complete the task?(1)Machines M and P, working simultaneously and independently at their respective constant rates, can complete the task in 36 minutes.(2)Machines K and P, working simultaneously and independently at their respective constant rates, can complete the task in 48 minutes.
86	A tank is filled with gasoline to a depth of exactly 2 feet. The tank is a cylinder resting horizontally on its side, with its circular ends oriented vertically. The inside of the tank is exactly 6 feet long. What is the volume of the gasoline in the tank?(1) The inside of the tank is exactly 4 feet in diameter.(2) The top surface of the gasoline forms a rectangle that has an area of 24 square feet.
87	The table above shows the results of a survey of 100 voters each responded "favorable" or "unfavorable" or "not sure" when asked about their impressions of candidate M and of candidate N. What was the number of voters who responded "favorable" for both candidates?(1)The number of voters who did not respond "favorable" for either candidate was 40.(2) The number of voters who responded "unfavorable" for both candidates was 10.
88	At a certain company, a test was given to a group of men and women seeking promotions. lf the average (arithmetic mean) score for the group was 80, was the average score for the women greater than 85 ?(1) The average score for the men was less than 75.(2) The group consisted of more men than women.
89	Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary`s campaign. If no one donated more than once and if there were no other donations, what was the value of n?(1)The first n people donated $$\frac1 {16}$$ of the total amount donated.(2)The total amount donated was $120,000.
90	What is the area of triangular region ABC above?(1)The product of BD and AC is 20.(2)x = 45
91	In the xy-coordinate plane, is point R equidistant from points (-3,-3) and (1,-3) ?(1) The x-coordinate of point R is -1(2) Point R lies on the line y = -3.
92	What is the ratio of the average (arithmetic mean) height of students in class X to the average height of students in class Y?(1)The average height of the students in class X is 120 centimeters.(2)The average height of the students in class X and class Y combined is 126 centimeters.
93	Is the positive two-digit integer N less than 40 ?(1) The units digit of N is 6 more than the tens digit(2) N is 4 less than 4 times the units digit.
94	If $${2}^{x+y}$$ = $${4}^{8}$$, what is the value of y?(1) $${x}^{2}$$ = 81(2) x − y = 2
95	Each week a certain salesman is paid a fixed amount equal to $300, plus a commission equal to 5 percent of the amount of his sales that week over $1,000. What is the total amount the salesman was paid last week?(1)The total amount the salesman was paid last week is equal to 10 percent of the amount of his sales last week.(2)The salesman's sales last week totaled $5,000.
96	A total of $60,000 was invested for one year. Part of this amount earned simple annual interest at the rate of x percent per year, and the rest earned simple annual interest at the rate of y percent per year. If the total interest earned by the $60,000 for that year was $4,080, what is the value of x?(1)$${x}=\frac {3y} {4}$$(2)The ratio of the amount that earned interest at the rate of x percent per year to the amount that earned interest at the rate of y percent per year was 3 to 2.
97	At a bakery, all donuts are priced equally and all bagels are priced equally. What is the total price of 5 donuts and 3 bagels at the bakery?(1)At the bakery, the total price of 10 donuts and 6 bagels is $12.90.(2)At the bakery, the price of a donut is $0.15 less than the price of a bagel.
98	In the figure above, is the area of triangular region ABC equal to the area of triangular region DBA ?(1) $$({A}{C})^{2}={2}({A}{D})^{2}$$(2)$$ \Delta $$ ABC is isosceles
99	If r and s are positive integers, can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits?(1) s is a factor of 100(2) r is a factor of 100
100	Max has $125 consisting of bills each worth either $5 or $20. How many bills worth $5 does Max have?(1)Max has fewer than 5 bills worth $5 each.(2)Max has more than 5 bills worth $20 each.

序号

题目内容

What is the value of integer n ?(1)n(n+1) = 6(2)$${2}^{2n}$$ = 16

What is the total number of coins that Bert and Claire have?(1) Bert has 50 percent more coins than Claire.(2) The total number of coins that Bert and Claire have is between 21 and 28.

A telephone station has x processors, each of which can process a maximum of y calls at any particular time, where x and y are positive integers. If 500 calls are sent to the station at a particular time, can the station process all of the calls?(1) x = 600(2) 100 < y < 200

On a certain nonstop trip, Marta averaged x miles per hour for 2 hours and y miles per hour for the remaining 3 hours. What was her average speed, in miles per hour, for the entire trip?(1) 2x + 3y = 280(2) y = x + 10

Three machines, K, M, and P, working simultaneously and independently at their respective constant rates, can complete a certain task in 24 minutes. How long does it take Machine K, working alone at its constant rate, to complete the task?(1)Machines M and P, working simultaneously and independently at their respective constant rates, can complete the task in 36 minutes.(2)Machines K and P, working simultaneously and independently at their respective constant rates, can complete the task in 48 minutes.

A tank is filled with gasoline to a depth of exactly 2 feet. The tank is a cylinder resting horizontally on its side, with its circular ends oriented vertically. The inside of the tank is exactly 6 feet long. What is the volume of the gasoline in the tank?(1) The inside of the tank is exactly 4 feet in diameter.(2) The top surface of the gasoline forms a rectangle that has an area of 24 square feet.