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What is the number 21 a prime or composite
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What is the number 21 a prime or composite

User Xlax
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Answer:

composite

Explanation:

User Alexandre Paulo
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21|3 \\ 7|7 \\ 1 \\ \\ 21=3*7 \\ \\ D_(21)= \{1;3;7;21\} \\ \\ it \ means \ that \ 21 \ is \ composite \ number
User Chris Driver
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