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题目内容
From 2002 to 2003, sales increased by 324%, while from 2002 to 2004, sales increased by 340%

Quantity A

The percent increase from 2003 to 2004

Quantity B

16%
From 2011 to 2012, Jack`s annual salary increased by 10 percent and Arnie`s annual salary decreased by 5 percent. If their annual salaries were equal in 2012, then Arnie`s annual salary in 2011 was what percent greater than Jack`s annual salary in 2011 ?

Give your answer to the nearest 0.1 percent.

_____%
A company`s revenue comes from A and B. If its total revenue this year increases by 5% year-on-year and reaches $42,000, while revenue from A increases by 2% year-on-year and reaches $10,200, then by how many percent did its revenue from B increase year-on-year?

Give your answer as percent.

_____%
Based on the information given, which of the following statements must be true?

Indicate all such statements.

During a one-year study, biologists observed the number of fish in a certain pond as well as the percent of the fish that were catfish. At the beginning of the year, there were 300 fish in the pond, of which 15 percent were catfish; and at the end of the year, there were 400 fish in the pond, of which 10 percent were catfish. From the beginning of the year to the end of the year, the number of catfish in the pond
If the average speed of a car is 1104km/h, then what is the speed per second in terms of mile (1 mile approximately equals to 1.6 kilometers)?

Give your answer to the nearest 0.01.
To fill a pool, A needs 12 minutes while B needs 20 minutes. How many minutes will it take if A and B work together?

Give your answer as a decimal.
Student A, B, and C together need 6 hours to finish a task, while A and B together need 8 hours to finish the same task. How many hours will it take for Student C to finish the task alone?
If it takes P and S together 1 hour and 20 minutes to fill $$\frac{2}{3}$$ of a swimming pool, and another 50 minutes for S alone to fill the rest, how many hours will it take if P is supposed to fill the entire swimming pool alone?
A certain factory has 8 identical machines that process a certain chemical product at the same constant rate. If it takes 40 hours for 5 of the machines, working simultaneously at their constant rate, to process a totaI of one ton of the product, how many hours does it take the 8 machines, working simultaneously at their constant rate, to process a total of one ton of the product?

_____hours
Printer A, B, and C together need 9 hours to finish a task, while B and C together need 12 hours to finish the same task. How many hours will it take for printer A to finish the task alone?
It takes 7 hours to drain off the water tank, while 10 hours to fill it up. For a full water tank, both the water-discharge valve and fill-in valve open for an hour first. Afterwards, the fill-in valve is closed. If so, then how many hours will it still take to drain off the water tank?

Give your answer as a decimal.
To finish a task, A and B could first work 4.5 hours together to complete $$\frac{3}{4}$$ of the task, while A alone work another 6 hours to complete the rest. In this case, how many hours will it take if B alone finish the entire task?
In a driving competition, Jeff and Dennis drove the same course at average speeds of 51 miles per hour and 54 miles per hour, respectively. If it took Jeff 40 minutes to drive the course, how long did it take Dennis?

Give your answer to the nearest 0.1.
By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3 grams of solution R are mixed with 7 grams of solution S, then liquid A accounts for what percent of the weight of the resulting solution?
A mixture of 12 ounces of vinegar and oil is 40 percent vinegar, where all of the measurements are by weight. How many ounces of oil must be added to the mixture to produce a new mixture that is only 25 percent vinegar?

Give your answer as a decimal.
Among three bottles of sugar water R, S and M, the sugar in R is $$\frac{1}{4}$$ of the sugar in S, while the sugar in S is $$\frac{5}{2}$$ of the sugar in M.

Quantity A

The total weight of sugar in R and S combined

Quantity B

3 times of the weight of sugar in M
At a sale, the cost of each tie was reduced by 20 percent and the cost of each belt was reduced by 30 percent.

Quantity A

The percent reduction on the total cost of 1 tie and 2 belts

Quantity B

25%
At A cornfield, super seed accounts for 17 percent of all seed, while at B cornfield,super seed accounts for 11 percent of all seed. Between cornfield A and B, there aremore seed, in total, in cornfield B than in cornfield A .

Quantity A: The percentage of super seed among all seed in cornfield A and B

Quantity B: 14%
To obtain an FHA mortgage for $50,000 or more, the home buyer must have a down payment equal to 4 percent of the first $25,000 of the mortgage amount and 5 percent of the portion in excess of $25,000. At settlement the buyers pays a mortgage-insurance premium equal to 3 percent of the mortgage amount. What is the maximum FHA mortgage, if any, a buyer can obtain if the buyer has only $6,000 available for the down payment and insurance premium?

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