McGraw-Hill Education GRE 2019

Exercise: Exponents and Roots

Discrete Quantitative Questions

1. 42165 = 2x. What is x?
   A 7
   B 9
   C 10
   D 20
   E 24

For this question, write your answer in the box.

2. 
   

   (^3) 1,002^21 1,003 7 1,001 equals

   
   


3. 
   

   If 5x + 5x + 5x + 5x + 5x = 5^6 , then x equals

   
   

A 1

B (^65)
C 5
D 6
E 30

4. If 2x+2 × 3y+3 = 576, where x and y are integers, what is x + y?
   A 2
   B 3
   C 5
   D 6
   E 8


5. If a = 0.729, which of the following must be true?
   A a > a^2 > √a
   B a > √a > a^2
   C a^2 > a > √a
   D √a > a^2 > a
   E √a > a > a^2

CHAPTER 11 ■ ALGEBRA 277

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