**Words of “Wiz-dom”**—There are a few basic rules about exponents that we need to review before we do a few sample problems. Do these review exercises, then we’ll get into how the test writer wants you to think. **Remember: Numbers have both positive and negative square roots**. Memorize the squares of 1 through 15 and cubes through 5. You’ll be happy you did.

### Answers to the questions on exponents

### Sample Questions

### 1.

(A)

(B)

(C)

(D)

(E)

### Answer to question #1

### 2. If and what is the value of xz?

(A) 3.5

(B) 9

(C) 14

(D) 21

(E) 24

### Answer to question #2

**3. **If *t* is a negative fraction, which answer below must be true?

### (A) t^{3}>t^{2}>t

(B) t^{2}>t>t^{3}

(C) t^{2}>t^{3}>t

(D) t>t^{2}>t^{3}

(E) t3>t>t^{2}

### Answer to question #3

### 4.

(A)

(B)

(C)

(D)

(E)

### Answer to question #4

### 5. If , then which of the following is true for y?

### (A)

(B)

(C)

(D)

(E)

Answer to question #5

6. If all variables are positive, then

### (A)

(B)

(C)

(D)

(E)

### Answer to question #6

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