Exponents

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) t3>t2>t
(B) t2>t>t3
(C) t2>t3>t
(D) t>t2>t3
(E) t3>t>t2

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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