Answer
$2\times2\times2\times5$
Work Step by Step
$2|\underline{40}$ last digit is even
$2|\underline{20}$ last digit is even
$2|\underline{10}$ last digit is even
$\ \ \ \ \ 5$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 1 - Unit 1A Review - Page 26: 19
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