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The standard deviation of $$n$$ numbers $$x_{1}$$, $$x_{2}$$, $$x_{3}$$,......, $$x_{n}$$, with mean $$\overline{x}$$ is equal to $$\sqrt{\frac{s}{n}}$$, where $$S$$ is the sum of the squared differences $$(x_{i} - \overline{x})^{2}$$ for 1 ≤ i ≤ n.

For what value of $$x$$ is the standard deviation of the numbers $$6$$, $$14$$, $$16$$, and $$x$$ least?
Looking back on a project that they had approached with both great________ and considerable aspirations, they were amused to recognize that neither the fears nor the hopes had been at all realistic.
Consider all the permutations of the letters in the word $$MISSISSIPPI$$, where $$I$$ is a vowel and the other letters are consonants.



Quantity A

The number of permutations in which all the vowels are next to each other

Quantity B

The number of permutations in which all the consonants are next to each other


If $$8^{x}=16$$, then $$x$$=
$$x^{2}-y^{2}$$=25

x-y=5

Quantity A

x+y

Quantity B

5


What is the units digit of the sum $$13^{10}+17^{10}$$ ?
Four people, including Ito and Kenji, are to be assigned to 3 offices. Two of the offices can accommodate only 1 person and the other office can accommodate 2 persons. If Ito and Kenji cannot be assigned to the same office,how many different assignments of the 4 people to the offices are possible?
$$x$$ and $$y$$ are positive integers.

$$xy$$ is divisible by $$24$$.

$$\frac{x}{2}$$ is an odd integer.

Quantity A

The remainder when $$y$$ is divided by $$4$$

Quantity B

$$1$$


Sets R, S, and T are nonempty, and each has the same number of elements. The sets R∩S, R∩T, and S∩T are nonempty, and each has the same number of elements. The set R∩S∩T is empty. Set V consists of all the elements in R that are not in S.

Quantity A

3 times the number of elements in V

Quantity B

The number of elements in the set R∪S∪T




The two circles shown have the same circumference and are tangent to each other at point S. Point R (not shown) is on one of the circles, and point T (not shown) is on the other circle.

Quantity A

The circumference of either circle

Quantity B

The length of line segment RT


Last year 40 percent of the students at College X took Biology I. If all of the science majors and 10 percent of the nonscience majors took Biology I, approximately what percent of the students at College X last year were science majors?
The sequence shown is defined by $$Q_1=6$$ and $$Q_{n+1}=\frac{1}{3}Q_n$$, for each positive integer n.

$$Q_1, Q_2, Q_3, ......, Q_n,.....$$

Quantity A

$$Q_{11}$$

Quantity B

$$(3^{17})Q_{28}$$


George invested $1,000 at a simple annual interest rate of 5 percent, earning a total of x dollars in interest for the first two years of the investment. Mary invested $1,000 at an annual interest rate of 5 percent compounded annually, earning a total of y dollars in interest for the first two years of the investment.

Quantity A

y-x

Quantity B

5


Of the 7 guests at a party, 3 are close friends of the host and 4 are acquaintances of the host. At the end of the party,the host will randomly select 2 different guests to win prizes. What is the probability that both of the prizewinners will be among the 3 close friends of the host?
Of the following, which best represents the graph in the xy-plane of the equation $$y=(x^2+1)(x-3)$$?



Five boxes each contain at least 1 ball. The mode of the numbers of balls in each of the boxes is 3. Which of the following statements must be true?

Indicate all such statements.
A certain list consists of 25 different positive integers, where each of the integers is a multiple of the positive integer m, The greatest integer in the list is 250.

Quantity A

m

Quantity B

5




According to the data in the graph, approximately what is the average (arithmetic mean) annual decrease from 1980 to 1995 in the list price of a Brand X microcomputer?
Sixty-eight people are sitting in 20 cars, and each car contains at most 4 people. What is the maximum possible number of cars that could contain exactly 1 of 68 people?
$$0 < x^y < 1$$

$$y$$ is an integer

Quantity A

$$y$$

Quantity B

0


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