Answer
$3$
Work Step by Step
The factors of 12 are $\{1,2,3,4,6,12\}$
The factors of 15 are $\{1,3,5,15\}$
The greatest common factor, therefore, is $3$.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 1 - Foundations for Algebra - 1-1 Variables and Expressions - Mixed Review - Page 9: 64
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