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The author's reference to the fact that "even low elemental concentrations and minute features in diamonds can now be analyzed" serves primarily to
A set consists of all three-digit positive integers with the following properties. Each integer is of the form JKL, where J, K, and L are digits; all the digits are nonzero; and the two-digit integers JK and KL are each divisible by 9. How many integers are in the set?
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.
$$n$$ is a positive integer.

Quantity A

The remainder when $$n(n^{2}-1)$$ is divided by 6

Quantity B

1


When the positive integer $$n$$ is divided by $$7$$, the remainder is $$2$$.

Quantity A

The remainder when $$2n+1$$ is divided by $$7$$

Quantity B

$$5$$


What is the units digit of the sum $$13^{10}+17^{10}$$ ?
Each day for 25 days, the number of people who used a certain library that day was recorded. The standard deviation of the 25 recorded numbers is 12.

Which of the following statements individually provide(s) sufficient additional information to determine the mean of the 25 recorded numbers?

Indicate all such statements.
For one toss of a certain coin, the probability that the outcome will be heads is $$\frac{1}{2}$$. If this coin is tossed 4 times, what is the probability that the outcome will be heads at least 3 times?


In the figure, line segment RM, SM, and TM bisect the angles of △RST.

Quantity A

$$\frac{x+y}{2}$$

Quantity B

33




Square ABCD has sides of length 1. Arc AC is an arc of the circle of radius 1 centered at B. Arc BD is an arc of the circle of radius 1 centered at A. These arcs divide the square into four regions, $$S_1, S_2, S_3$$, and $$S_4$$.

Quantity A

The area of region $$S_1$$ minus the area of region $$S_3$$

Quantity B

$$\frac{π}{2}-1$$


In noting that critical and popular opinions about Li`s art coincided, Chuang _____ the existence of an exception to her general theory of art criticism, which posits that critics` views do not intersect with those of the general public.

Quantity A

$$5(2^{x})$$

Quantity B

$$4(3^{x})$$


From a group of 100 people including Alice and Bob, 40 people are to be randomly selected at the same time to win movie tickets. What is the probability that both Alice and Bob will be selected to win movie tickets?


The two circles have centers at B and C, respectively, and are mutually tangent. Each circle has radius r.

Quantity A

The perimeter of quadrilateral ABCD

Quantity B

8r




A town library held a reading drive, in which 20 elementary school students were asked to record the number of books they read over the summer. Only whole numbers of books were recorded. The table above shows the results of the reading drive. The average (arithmetic mean) number of books read by the students was 2 books per student.

Which of the following statements individually provide(s) sufficient additional information to conclude that only one student read only 5 books?

Indicate all such statements.
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?


In the figure shown, AB is parallel to EC and the length of ED is $$\frac{1}{3}$$ of the length of AD.

Quantity A

The ratio of the area of triangle ECD to the area of quadrilateral ABCE

Quantity B

$$\frac{1}{8}$$


When the positive integer $$m$$ is divided by $$42$$, the remainder is $$13$$. What is the remainder when $$m$$ is divided by $$6$$?
What is the greatest possible area of a rectangular region whose perimeter is 60?
Two different integers, x and y, are to be selected at random from the set of positive integers less than 100.

Quantity A

The probability that both x and y will be even

Quantity B

The probability that x+y will be even


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