Answer
$6$
Work Step by Step
Factor each number completely to obtain:
$66=6(11) = 2(3)(11)
\\90=5(18) = 5(2)(9) =5(2)(3)(3)$
Thus, the greatest common divisor is $2(3)=6$.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 5 - Number Theory and the Real Number System - 5.1 Number Theory: Prime and Composite Numbers - Exercise Set 5.1 - Page 256: 48
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