题库 | 考满分，百万出国党的口碑之选。

序号	题目内容
121	There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?
122	An operation ◎ is defined by the equation a◎b=(a-b)/(a+b), for all numbers a and b such that a ≠ -b. If a ≠ -c and a ◎ c = 0, then c =
123	The price of lunch for 15 people was $207.00,including a 15 percent gratuity for service. What was the average price per person, EXCLUDING the gratuity?
124	In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males. What percent of the employed people in Town X are females?
125	if $$\frac{p}{q}$$<1, and p and q are positive integers, which of the following must be greater than 1 ?
126	It would take one machine 4 hours to complete a large production order and another machine 3 hours to complete the same order. How many hours would it take both machines, working simultaneously at their respective constant rates, to complete the order?
127	To mail a package, the rate is x cents for the first pound and y cents for each additional pound, where x > y. Two packages weighing 3 pounds and 5 pounds, respectively, can be mailed separately or combined as one package. Which method is cheaper, and how much money is saved?
128	If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately $$\frac{70}{r}$$ years. If Pat's parents invested $5,000 in a long-term bond that pays 8 percent interest, compounded annually, what will be the approximate total amount of the investment 18 years later, when Pat is ready for college?
129	On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car got on this trip must have been between
130	Which of the following inequalities is an algebraic expression for the shaded part of the number line above?
131	A factory has 500 workers, 15 percent of whom are women. If 50 additional workers are to be hired and all of the present workers remain, how many of the additional workers must be women in order to raise the percent of women employees to 20 percent?
132	In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the average daily revenue for the last 4 days?
133	A certain country had a total annual expenditure of $$$1.2 \times {10}^{12}$$ last year. If the population of the country was 240 million last year, what was the per capita expenditure?
134	A certain rectangular window is twice as long as it is wide. If its perimeter is 10 feet, then its dimensions in feet are
135	The diagram above shows the various paths along which a mouse can travel from point X, where it is released, to point Y, where it is rewarded with a food pellet. How many different paths from X to Y can the mouse take if it goes directly from X to Y without retracing any point along a path?
136	If the operation * is defined by $$xy=\sqrt{xy}$$ for all positive numbers x and y, then (5 45) * 60 =
137	A bar over a sequence of digits in a decimal indicates that the sequence repeats indefinitely.What is the value of $$({10}^{4}-{10}^{2})(0.00\overline{12})$$?
138	At a loading dock, each worker on the night crew loaded $$\frac{3}{4}$$ as many boxes as each worker on the day crew. If the night crew has $$\frac{4}{5}$$ as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?
139	A restaurant meal cost $35.50 and there was no tax. If the tip was more than 10 percent but less than15 percent of the cost of the meal, then the total amount paid must have been between
140	In a weight-lifting competition, the total weight of Joe's two lifts was 750 pounds. If twice the weight of his first lift was 300 pounds more than the weight of his second lift, what was the weight, in pounds, of his first lift?

序号

题目内容

121

There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

122

An operation ◎ is defined by the equation a◎b=(a-b)/(a+b), for all numbers a and b such that a ≠ -b. If a ≠ -c and a ◎ c = 0, then c =

123

The price of lunch for 15 people was $207.00,including a 15 percent gratuity for service. What was the average price per person, EXCLUDING the gratuity?

124

In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males. What percent of the employed people in Town X are females?

125

if $$\frac{p}{q}$$<1, and p and q are positive integers, which of the following must be greater than 1 ?