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9 ml of Solution A is 30% salt. When mixed with 18 ml of Solution B, the mixed solution is 25% salt. Solution B is how many percent salt?

Give your answer in percentage.

_____%
Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salary is $25,000 for the employees in Department X and is $ 35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees in the company?

Indicate all such amounts.
Someone borrows $15,000 at an annual interest rate of 8% and returns the same amount of money at the end of every month for 12 consecutive months, starting from the end of January. By which month will the amount of money left to be returned become less than 10,000?
A charity and a company raises funds together. However, the funds the company is supposed to raise follows the rules below.



If they have to raise $68,000 in total, then how much money does the charity need to raise?
A total of $60,000 was invested for onemonth in a new money market account that paid simple annual interest at the rate of r percent. If the investment earned $450 in interest for the month, what`s the value of r?

Someone puts away S in a bank and collects interest that compound annually with an interest rate of r%.

Quantity A

Principal plus interest after two years

Quantity B

S(1+2r%)


For 7 soccer ball teams, each of them has to play with all the other teams. However, to decide which team wins, every two teams have to play 3 rounds and the team that win for the most times will ultimately win. How many rounds do all the 7 teams have to play?
For 7 soccer ball teams, each of them has to play with all the other teams. However, to decide which team wins, every two teams have to play 3 rounds and the team that win for the most times will ultimately win. How many rounds of game does each team have to play?

Point O is the center of the circle.

Quantity A

x+y

Quantity B

90



△ABC is inscribed in a circle, where AB is the diameter of the circle.

Quantity A

Five times the area of △ABC

Quantity B

The area of the circle



The circle has center O and radius $$x$$.

Quantity A

The perimeter of triangle PRT

Quantity B

$$4x$$



C is the midpoint of semicircle ABCD.

Quantity A

The area of region ABD

Quantity B

The area of region ACD



AB is the diameter of the circle, ∠CBD=65°,what`s the value of ∠CAD?

The figure above is a cube, AG=2$$\sqrt{3}$$, what`s the side of the cube?
If a container can hold 3 cubic feet of goods (1yard=3feet),then 100 such containers can hold n cubic yard of goods
Quantity A: n
Quantity B: 13
If it costs $400 to paint the four walls and the floor of a house whose length is twice of its width and whose width and height are the same ($10 per square feet), what`s the length of the house?
A solid right circular cylinder is inside a cubical box. The base of the cylinder rests flat on the bottom of the box, and the cylinder touches the sides and the top of the box. Which of the following is closest to the ratio of the volume of the cylinder to the volume of the box?

The total number of Set I is 7,000 and the total number of Set II is 13,500.
What is the closest value of ratio of the number of A in set I to the number of A in set II?
If the number of B in set I decreases by 350, what is the new percentage of B in Set I?
Give your answer to the nearest 0.1 percent.
_____%

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