Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - Chapters 1-2 Cumulative Review Problem Set - Page 91: 28

Answer

6

Work Step by Step

First, we express each number as a product of its prime factors: $48=2\times2\times2\times2\times3$ $66=2\times3\times11$ $78=2\times3\times13$ Since a single 2 and a single 3 is common to all of the numbers, the Greatest Common Factor$=2\times3=6$
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