题目列表

At a furniture store on Monday, the retail price of a table was n dollars. On Wednesday that week, the retail price of the table was reduced to $56. On Friday that week, the price of table was reduced again to 25 percent less than the price on Wednesday. If the ratio of n to the price of the table on Friday is 32 to 21, what is the value of n? Last year Leo bought two paintings. This year he sold them for$21,000 each. On one, he made a 25% profit, and on the other he had a 25% loss. What was his net loss or profit?

$_____ On the first day, the ticket price of a concert is 15% less than the original price; on the second day, the ticket price of the concert continued to drop by 20% than the first day. What percent is the price of the ticket on the second day less than the original price? Give your answer as a percent. _____% For each of the years 1993 and 1994, the population of City M increased by 20 percent during the year. If the population was 280,000 on December 31, 1994, approximately what was the population on January 1, 1993? y=2x+1, where x > 0. Quantity A The percent increase in the value of y when the value of x is increased by 10% Quantity B 10% Three variables, x, y, and z, in a scientific experiment are related by the equation $z=x^{2}y$. In the experiment, if the value of x decreases by 40 percent while the value of y increases by 50 percent, what is the percent decrease in the value of z? The total revenue that firm P receives from the sale of a particular item is determined by multiplying the number of the items it sells by the price of the item. If the price of the item is to be decreased by 20 percent, by what percent must the number of the items sold increase to keep the total revenue unchanged? Evelyn owns two different properties with areas of 1.5 acres and 0.5 acre, respectively. What is the total area, in square feet of the two properties combined? (1 acre = 4,840 square yards, 1 yard = 3 feet) _____square feet 1 yard=3 feet 1 acre=4840 square yard Quantity A One acre when transformed in terms of square feet Quantity B 40,000 The area of a certain floor is 150 square feet. (1 yard=3 feet) Quantity A The area of the floor, in square yards Quantity B 30 1 cup=8 ounces 1 pint=2 cups 1 quart=2 pints A large coffee jug contains 3 quarts, 1 pint, and 1.5 cups of coffee. What is the greatest number of 12-ounces mugs of coffee that can be filled from the jug? A certain store sells circular rugs at a constant price per square foot. If a circular rug with diameter 5 feet costs$250, what is the cost of a circular rug with diameter 9 feet?
After a bird feeder was filled with x pounds of birdseed, 12 ounces of birdseed were consumed each day for the next 8 days. (1 pound=16 ounces)

Quantity A

At the end of the 8 days, the weight of the birdseed in the bird feeder that was not consumed

Quantity B

x-5 pounds

The length of a model car is 8.2 centimeters, and the ratio of the length of the model car to the length of the actual car that it represents is 1 to 64. The length of the actual car is how many meters? (1 centimeter=0.01 meter)

_____meters
To fill a cube, machine A needs 5 hours. If machine A and B together fill the cube, it will take 1/3 of the time if machine B fills the cube alone. How many hours will it take if B fill the cube alone?
It takes machine A 2 minutes to fill a cube whose volume is 50m3 with water. If the cube holds 10m3 of water at first, and then machine A works for 1.5 minutes. By then, what percent of the cube is filled with water?

_____%
By draining 40 gallons of water from a tank, the amount of water in the tank was decreased from $\frac{1}{5}$ of the tank 's full capacity to $\frac{2}{11}$ of the tanks full capacity. Water was then added to the tank until the tank was full. How many gallons of water were added to the tank?
The overall volume of a water tank is g. If the inlet valve is open for a minute, x volume of water will be added to the tank; If the discharge valve is open for a minute, y volume of water will be removed from the tank (y>x). If the tank is filled with water at first, then in how many minutes will the water volume in the tank drop to a half if the inlet valve and discharge valve are both open?

Water started running into an empty tank and continued running until it was filled to its capacity. Water ran at a constant rate of 200 kiloliters per minute for the first 20 minutes and then at a constant rate of 100 kiloliters per minute until the tank was filled. If it took a total to 80 minutes to fill the empty tank to its capacity. how many minutes did it take to fill the tank to $\frac{1}{2}$ of its capacity?
A pump delivered water to fill an empty swimming pool. The pump delivered the water at a constant rate of 450 liters per minute until the pool was $\frac{1}{2}$ full. Then the pump became partially clogged and delivered the water at a slower constant rate until the pool was full. For the whole time during which the pump delivered water to fill the empty pool, its average rate was 360 liters per minute. What was the pump`s slower constant rate, in liters per minute?