Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Entry-Level Assessment - Multiple Choice - Page xxxviii: 2

Answer

The answer is J: They are all composite.

Work Step by Step

They are all composite because they have other factors that go into them other than themselves and 1. 21 has 3 and 7. 46 is even, and all even numbers after 2 are all composite because 2 will always be a factor of them. Lastly, 57 is composite because 57 is divisible by 3.
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