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A group of people belong to either association A, or association B, or both. Among members in A association, 30% are also in B association. Among members in B association, 20% are also in A association.

Quantity A

The number of members in A association

Quantity B

The number of members in B association


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.
Among 150 people surveyed, 40% are more than 60 years old and 80% are employed. Then what is the possible number of the people who are both more than 60 years old and employed?
Indicate all
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

$$\sqrt[3]{80}$$


Several parents take their children to the park and need to buy tickets and food. The ticket price for each parent is 20 dollars and the ticket price for each child is 10 dollars. The number of parents is equal to the number of children. The total cost of tickets is 420 dollars. The average cost for food and ticket is 21 dollars, how much do they pay for food?
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)?
-1 < x < y < 0

Quantity A

2x

Quantity B

y


a, c and k are positive integers.

Quantity A

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

Quantity B

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


If a and b are positive numbers and a + b =10,what is the greatest possible value of ab?
The average height of the first five people is 60 inches, and the average will become over 60 inches when the sixth one joins, what is the height of the sixth person could be?

Indicate all such possible heights.
There are 1200 respondents to a survey and the number of male respondents is more than 600. Now 10% of male respondents and 30% of female respondents support a certain policy, then what is range of the number of the people who support this policy (the difference between the largest and least possible number)?
Which of the following functions f defined for all numbers x has the property that f(-x)=-f(x)?
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