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1, 2, 2, 3, 3, 3, 4, 4, 4, 4, ......, 24

The list above consists of 300 entries that are integers in increasing order, and each integer n occurs n times for 1 ≤ n ≤ 24. What is the least integer k in the list for which at least 15% of all the entries are less than k?
The probability distribution function P of a continuous random variable X is defined as shown. If P(X≤k) < $$\frac{1}{2}$$ , which of the following could be the value of k?



Indicate all such values.

Quantity A

$$89!-88!$$

Quantity B

$$(87!)(88)^{2}$$


How many integers between 100 and 1,000 are multiples of 7?
For the numbers in set A, the average (arithmetic mean) is 5.0 and the standard deviation is 0.6. For the numbers in set B, the average (arithmetic mean) is 5.0 and the standard deviation is 0.7.

Quantity A

The standard deviation of the numbers in A after each number in that set has been increased by 3

Quantity B

The standard deviation of the numbers in B after each number in that set has been increased by 2


In the $$xy$$-plane, ten points are selected from the line with equation $$y=0.8x-24$$. If the range of the $$y$$ coordinates of the ten points is $$7$$, what is the range of the $$x$$-coordinates of the ten points?
The standard deviation of m numerical data $$ x_{1}, x_{2}, x_{3}, ..., x_{n}$$, With mean $$\bar{x}$$ is equal to $$\sqrt{\frac{S}{n}}$$, where S is the sum of the squared differences $$(x_{i}-\tilde{x})^{2}$$, for 1 ≤ i ≤ n.

On a certain examination, 7 students received scores of 85, 90, 70, 90, 75, 90, and 95. For the 7 scores, the mode was approximately how many standard deviations above the mean?
If $$n$$, $$k$$, and $$r$$ are positive integers such that $$n^{k}=10r+3$$, which of the following could be the value of $$n$$?
The repeating decimal $$1.\overline{ab}$$, where a and b are different digits, is equivalent to the fraction $$\frac{n}{d}$$, where n and d are positive integers whose greatest common factor is 1. What is the greatest possible value of n+d ?
Jamie claimed that if n is a positive integer, then $$4n^{2}- 3$$ must be a prime number. Which of the following values of n could be used as a counterexample to show that Jamie's claim is not true?

Indicate all such values.
The integer k is the product of four different prime numbers. If k divided by 22 is a multiple of 13, which of the following could be equal to k divided by 11?
$$x \gt 0$$

Quantity A

$$\frac{1}{9}$$ of $$x$$

Quantity B

$$11$$ percent of $$x$$


What is the least integer that can be expressed as a product of four different integers, each of which has a value between -5 and 4, inclusive?
The product of nine consecutive integers is 0.

Quantity A

The sum of the nine integers

Quantity B

30


How many of the eleven integers greater than $$10^{7}$$ and less than $$10^{7}$$+12 are divisible by 11?
n is a positive even integer

Quantity A

The greatest possible value of x such that $$2^{x}$$ is a factor of n(n+2)(n+4)(n+6)

Quantity B

The greatest possible value of y such that $$2^{y}$$ is a factor of n(n+2)(n+4)(n+6) + 320


Claire regularly backs up both of the computers that she owns. On the first day of June, she backs up both computers. Thereafter, she backs up one of the computers every sixth day during June (that is, on June 7 and so on), and she backs up the other computer every eighth day during June. On how many of the 30 days in June $$\underline{does}$$ she not back up either of the two computers.

_____days
$$r$$ is the remainder obtained when dividing $$7^{995}+7^{50}-4$$ by $$7$$.

Quantity A

$$r$$

Quantity B

$$4$$


15,000 is divisible by $$25a^{k}b^{2}$$, where a and b are prime numbers, a ≠ b, and k is a positive integer.

Quantity A

The greatest possible value of k

Quantity B

3


Of the artists in the graphics department of a multimedia company, 60 percent are working on digital projects, and the remaining artists are working on hard-copy projects. Of the artists working on digital projects. 20 percent attended a fine arts school. Of the artists working on hard-copy projects, 10 percent attended a fine arts school. Of the artists in the graphics department who attended a fine arts school, what percent are working on digital projects?

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