Elementary Technical Mathematics

by Nelson, Robert; Eren, Dale;

Published by Brooks Cole

ISBN 10: 1285199197

ISBN 13: 978-1-28519-919-1

Chapter 1 - Section 1.5 - Prime Factorization - Exercise - Page 25: 1

Answer

(a) yes (b) no

Work Step by Step

(a) 15 is divisible by 3 (since its digits sum to a number divisible by 3: 1+5=6 which is divisible by 3) (b) 15 is not divisible by 4

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