#### 题目列表

In the first year, the sales of a store is a. Its sales increase by x% every two years, and reach 1.4a in the fifth year.

x

#### Quantity B

20%

The principal a decreased by x% (10 < x < 40) in the first year, and then decreased by x% in the second year.

#### Quantity A

The amount of the remaining money

#### Quantity B

a (1- $\frac{2x}{100}$)

A becomes 40% greater than before, and B becomes 20% less than before, what is the ratio of the new ratios of A:B to the original ratio of A:B?

A shoe store has a discount of 20% to 40%. If the original price of the shoes is 59.5$, which of the following could be the selling price? Indicate all such measures. An item was discounted by 20%, and the reduced price was discounted by 40%, what percentage did the original price discount off? Give your answer as a percent. In the first year, the sales of a store is x dollars. In the second year, its sales increase by 10% than the first year. In the third year, its sales drops by 5% than the second year. #### Quantity A The percent increase/decrease of the store in the third year than the first year #### Quantity B 5% The price of a product was a in 2001, the price increased 10% in 2002, and then decreased 5% in 2003. #### Quantity A The percent increase (or decrease) from 2001 to 2003 #### Quantity B 5% In an organization that has boys and girls, if the number of boys and of girls decreases by the same amount simultaneously, there will be fewer boys than girls. #### Quantity A The percentage of decrease in the number of boys #### Quantity B The percentage of decrease in the number of girls #### Quantity A 0.8 minutes less than 0.08 hour #### Quantity B 4 minutes The average speed of a car is 104km/h,then what is the speed per hour in terms of mile?(1mile=1.6km) At 12:00 the water in a tank started to go out through one outlet with the speed of 120 liters per minute. At 14:00 another outlet was opened, and 250 liters of water went out per minute through all these two outlets, and the water tank was totally drained at 16:30. Then how many liters of water was there in the tank at 12:00? The speed of a car is 90 kilometers per hour. Which of the following must be true? (1mile=1.603 kilometers, 1foot=0.304 meters) An American paid$100 for an item in country D and got the change in 1000 D bills. Which of the following statements individually provide(s) sufficient additional information to determine how many dollars the item is?

Indicate allsuch statements.
To fill a pool, A need to work alone for 12 minutes and B needs to work alone for 20 minutes. How many minutes will it take if A and B work together?

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?
To fill an empty tank, inlet pipe A and B could first work 1 hour and 20 minutes together to fill $\frac{2}{3}$ of the task, while inlet pipe B alone work another 50 minutes to fill the rest. In this case, in how many hours will it take if A alone fill the entire tank?
It takes the input pipe 10 hours to fill an empty tank to its full capacity, and it takes the output pipe 7 hours to pour the water out from full capacity to empty. The tank is full now and the input pipe and output pipe are both open for 1 hour, then shut the input pipe, and keep the output open, how many hours will the tank be empty after shutting the input pipe?

Someone walks s steps in t seconds, then how many steps can she/he walks in $\frac{1}{10}$ minutes?