GRE考满分·题库

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题目列表

题目内容
The function $$f$$ is defined by $$f(x)=3x+1$$ for all numbers x. If $$f(a)=a$$, what is the value of $$a$$?

Give your answer as a decimal.
If 75 percent of the United States foreign aid to the Middle East in 1994 was spent for economic aid and 25 percent was spent for military aid, approximately how many billion dollars was spent for economic aid to the Middle East that year?
The ratio of the amount of foreign aid spent in Africa to the amount spent in Russia and Eastern Europe was closest to
If United States foreign aid was approximately $$\frac{9}{10}$$ of 1 percent of the federal budget for 1994, then the federal budget was approximately how many billion dollars?
An order for bottles of vitamins from a certain mail order company costs $12.04 per bottle plus a shipping cost of $4.80 regardless of the number of bottles ordered. Over the past year, the company has received 100 orders for bottles of vitamins. The standard deviation of the numbers of bottles per order for the 100 orders is 1.5 bottles. What is the standard deviation of the 100 costs for the orders?

_____$
If the number of square inches in the area of a square region is equal to the number of inches in the perimeter of the square, then the length of the diagonal of the square is how many inches?
In a group of 50 students, 22 are enrolled in a psychology course, some are enrolled in a sociology course, some are enrolled in both courses, and some are not enrolled in either course.

Which of the following statements individually provide(s) sufficient additional informatioin to determine the number of students enrolled in both courses?

Indicate all such statements.

Quantity A

The annual simple interest rate if $200 earns $50 interest in 3 years

Quantity B

The annual simple interest rate if $600 earns $90 interest in 2 years
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


Quantity A

4

Quantity B

k


Quantity A

x+y+z

Quantity B

360
S is an integer that is greater than 2.

Quantity A

The average (arithmetic mean) of $$\frac{1}{S^{2}}$$, $$\frac{1}{S}$$, $$S$$, and $$S^{2}$$

Quantity B

$$2S$$
Which of the following are positive numbers?

Indicate all such numbers.
Which of the following double inequalities involving $$\sqrt[3]{0.8}$$ is true?
One of the solutions of the equation $$6x^{2}-$$x$$-35=0$$ is $$\frac{n}{2}$$, where $$n$$ is a positive integer. What is the value of $$n$$?

$$n$$=_____
For how many of the five response categories in the table was the number of responses less than 750?
Based on the information given, which of the following statements are true?

Indicate all such statements.
If 24 percent of the homeowners who were asked Question 2 responded both "house is comfortable" and "house is in good condition", what percent of the homeowners who were asked Question 2 gave neither of these responses?
A college professor took attendance for the first 10 days of a class last semester. The professor noticed that Sarah attended class on 8 of those days, Andrew attended class on 7 of those days, Jeff attended class on 6 of those days, and on only 1 of those days did all three students attend class. On how many of the 10 days did at least two of the three students attend class?

_____days
In the xy-plane, what is the x-intercept of the line that passes through the point (2, -4) and is perpendicular to the line 6x-3y=4?

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