#### Answer

$144$

#### Work Step by Step

There are 9 digits, 8 possibilities for the first and 2 possibilities for the second number, so by using the fundamental counting rule we can get the number of possibilities: $8\times2\times9=144$.

Published by
Pearson

ISBN 10:
0321836960

ISBN 13:
978-0-32183-696-0

$144$

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