### All GRE Math Resources

## Example Questions

### Example Question #213 : Algebra

Quantitative Comparison

Column A:

Column B:

**Possible Answers:**

The quantities are equal.

Quantity A is greater.

Quantity B is greater.

The relationship cannot be determined from the information provided.

**Correct answer:**

The relationship cannot be determined from the information provided.

For quantitative comparison questions involving a shared variable between quantities, the best approach is to test a positive integer, a negative integer, and a fraction. Half of our work is eliminated, however, because the question stipulates that x > 0. We only need to check a positive integer and a positive fraction between 0 and 1. Plugging in 2, we see that quantity A is greater than quantity B. Checking 1/2, however, we find that quantity B is greater than quantity A. Thus the relationship cannot be determined.

### Example Question #31 : Inequalities

If –1 < *n* < 1, all of the following could be true EXCEPT:

**Possible Answers:**

n^{2} < n

n^{2} < 2n

|n^{2} - 1| > 1

(n-1)^{2} > n

16n^{2} - 1 = 0

**Correct answer:**

|n^{2} - 1| > 1

### Example Question #31 : Inequalities

(√(8) / -x ) < 2. Which of the following values could be x?

**Possible Answers:**

-1

-4

All of the answers choices are valid.

-3

-2

**Correct answer:**

-1

The equation simplifies to x > -1.41. -1 is the answer.

### Example Question #221 : Algebra

Solve for *x*

**Possible Answers:**

**Correct answer:**

### Example Question #34 : Inequalities

We have , find the solution set for this inequality.

**Possible Answers:**

**Correct answer:**

### Example Question #13 : Inequalities

Fill in the circle with either , , or symbols:

for .

**Possible Answers:**

None of the other answers are correct.

The rational expression is undefined.

**Correct answer:**

Let us simplify the second expression. We know that:

So we can cancel out as follows:

### Example Question #222 : Algebra

Solve the inequality .

**Possible Answers:**

**Correct answer:**

Start by simplifying the expression by distributing through the parentheses to .

Subtract from both sides to get .

Next subtract 9 from both sides to get . Then divide by 4 to get which is the same as .

### Example Question #222 : Algebra

Solve the inequality .

**Possible Answers:**

**Correct answer:**

Start by simplifying each side of the inequality by distributing through the parentheses.

This gives us .

Add 6 to both sides to get .

Add to both sides to get .

Divide both sides by 13 to get .