Two composite numbers that have 8 as a factor are 16 and 24. Both numbers can be divided by 8 without leaving a remainder, and they each have additional factors beyond 1 and themselves, qualifying them as composite numbers.
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28 and 32
8 and 16
Prime numbers have one factor pair. Composite numbers have two or more pairs. (6,8) and (4,12) are two different factor pairs for 48.
Composite numbers have more than two factors. Once you find a third factor, you know your number is composite.
Only two: (4, 9) and (6, 6). In all other factor pairs, one of the numbers is not composite.