#### Answer

Composite.

#### Work Step by Step

51 is composite as there are numbers different than 1 and 51 itself that go into 51. For example; 1, 3, 17, and 51 are all factors of 51 itself.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

Composite.

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