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题目内容
In 1988 Mr.Smith's annual income was greater than Mrs.Smith's annual income.In 1989 Mr.Smith's annual income decreased by ppercent.whereas Mrs.Smith's annual income increased by p percent.p>0

Quantity A

Mr.and Mrs.Smith's combined annual income in 1988

Quantity B

Mr.and Mrs.Smith's combined annual income in 1989


The price of a certain stock was$$12·(\frac{1}{2})$$ dollar per share.The price increased x percent to $$15·(\frac{5}{8})$$ dollars per share.

Quantity A

x

Quantity B

20


Quantity A

$$\frac{1}{1-0.03}$$

Quantity B

1.03


The original value of machine X is Vdollars.while the original value of machine Y is 2Vdollars.Both machines depreciate in value at a constant rate of 10 percent of their original value per year.

Quantity A

The value of machine X after 3 years

Quantity B

The value of machine Y after 6 years


Quantity A

The two-digit integer that equals twice the sum of its digits

Quantity B

16


When the even integer n is divided by 7,the remainder is 3.

Quantity A

The remainder when n is divided by 14.

Quantity B

10


$x$ represents the greatest integer less than or equal to x and #x# repreaents the least integer greater than or equal to x.

Quantity A

$$\frac{$(1.4)$$+\sharp1.4\sharp}{2}$$

Quantity B

1.4


S is a set of n consecutive integers.

Quantity A

The mean of S

Quantity B

The median of S


From the set of 6 letter A,B,C,D,E,and F,there are 20 different 3-letter subsets that could be selected.

Quantity A

The number of 3-letter subsets that include the letter F

Quantity B

10


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The curvature of a circle is define to be the reciprocal of the radius of the circle.

Quantity A

The curvature of a circle with circumference 35π.

Quantity B

The curvature of a circle with circumference 36π.


The length of a rectangular box is 4 inches longer than the depth,and the width of the box is 1 inch less than the length.The depth of the box is between 2 inches and 4 inches。

Quantity A

The volume of the box in cubic inches

Quantity B

200


Quantity A

$$\frac{10}{0.9^{2}}$$

Quantity B

$$\frac{10^{2}}{9}$$




Quantity A

The area of the triangular region

Quantity B

The area of the circular region


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Quantity A

$$\sqrt{(79)(80)(81)(82)}$$

Quantity B

6,400


In a bowl that contains 20 marbles,7 are green,6 are red,and the remainder are blue.Two marbles are to be drawn at random from the bowl without replacement.

Quantity A

The probability that one marble is green and the other marble is red

Quantity B

The probability that one marble is green and the other marble is blue


The 20 people at a party are divided into n mutually exclusive groups in such a way that the number of people in any group does not exceed the number in any other group by more than 1.

Quantity A

The value of n if at least one of the groups consists of 3 people

Quantity B

6


If n is a positive integer,then n+ denotes a number such that n < n+< n +1.

Quantity A

20+/4+

Quantity B

5+


If w,x,y,and z are all integers such that 1 < w < x < y < z and wxyz=462.

Quantity A

w+z

Quantity B

10


Seven one-dollar bills are to be distributed among Lucia,Gomez,and Domingo so that each person receives at least $1.

Quantity A

The number of ways to distribute the bills so that at least one person receives at least $3

Quantity B

The total number of ways to distribute the bills


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