Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 1 - Section 1.5 - Prime Factorization - Exercise: 56



Work Step by Step

$3|\underline{63}$ sum of digits is divisible by 3 $3|\underline{21}$ sum of digits is divisible by 3 $\ \ \ \ \ 7$
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