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: 5

Answer

(a) yes (b) no

Work Step by Step

(a) 78 is divisible by 3 since its digits add up to a number divisible by 3 (7+8=15, which is divisible by 3) (b) 78 is not divisible by 4 (78/4=19.5)
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