#### Answer

$2\times3\times7$

#### Work Step by Step

$2|\underline{42}$ last digit is even
$3|\underline{21}$ sum of digits is divisible by 3
$\ \ \ \ \ 7$

Published by
Brooks Cole

ISBN 10:
1285199197

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

$2\times3\times7$

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.