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题目内容
Of the 1,000 people, there are 300 people who are 40 years old or older, and 320 women who are younger than 40 years old. What is the number of men younger than 40 years old?
In a sample of $$n$$ people, 80 percent of the people filled out a questionnaire. If 65 percent of those who filled out the questionnaire are college graduates, what is the greatest possible percent of college graduates in the sample of $$n$$ people?
Thirty percent of the members of Club A are also members of Club B. Forty percent of the members of Club B are also members of Club A.

Quantity A

The total number of members of Club A

Quantity B

The total number of members of Club B
The candies in a candy shop can be divided into unscented and scented, and they can also be divided into blue and green. There are 1000 unscented candies and 1000 blue candies. 25% of blue candies and 50% of green candies are scented. When the candies which are neither scented blue nor scented green are sold out, how many candies are there still in the shop?
There are 120 students in the class. 3/5 of them attend match class, and 1/2 of them attend English class. Which of the following could be the number of students who only attend match class? Indicate all such measures.
In a group of 150 people, 40 percent are older than 60 years and 80 percent are employed.Which of the following could be the number of people who are both employed and older than 60 years?
Indicate all such numbers.
What percent of non-negative integers less than 2000 is perfect square?

Give your answer to the nearest hundredths of a percent.

_____%

Quantity A

$$\sqrt[3]{270}$$ - $$\sqrt[3]{10}$$

Quantity B

$$\sqrt[3]{80}$$
A group of adults and children spent a total of $420 for tickets and food at the circus. Tickets to the circus cost $20 per adult and $10 per child. If the group spent an average of $21 per person for tickets and food, and there were the same number of adults as children in the group,what was the total amount that the group spent on food at the circus?
3x+y=12

x+$$\frac{y}{3}$$=4

Quantity A

x

Quantity B

y
A certain number of balls can be equally divided into x boxes. If these balls can be equally divided into (x-3) boxes with 12 balls in each box and there will still be 5 balls outside. What is the value of x?
x * y=2

x + y=3

Quantity A

(y-2)(y-1)

Quantity B

0
In a game, Mark could pick up either 2 point card or 4 point card. The average points of all the card he picks is 3.8.

Quantity A

The product when multiplying 9 and the number of times he picks up 2 point cards

Quantity B

The number of times he picks up 4 point cards
x=a-b, y=b-c, z=c-a

Quantity A

$$(x+y+z)^{2}$$

Quantity B

1
If 6x+7y+8z=121，8x+7y+6z=140，what is the result of x+y+z？ Give your answer as a fraction.
p=2c,t=($$\frac{1}{2}$$)c-p,i=c-50. Which of following statement individually provides sufficient additional information to determine the value of c?

Indicate all such statements.
If f(x)=$$x^{2}$$+2x, g(x)=3x+2, what is the least value of x when f(x)=g(x)?
What is the the product of the two solutions of the equation $$3x^{2}$$+8x-3=0?
-1 < x < y < 0

Quantity A

2x

Quantity B

y
a, c and k are positive integers.

Quantity A

$$\frac{a}{c}$$

Quantity B

$$\frac{(a+k)}{(c+k)}$$

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