kelvinmalonekt kelvinmalonekt

20-09-2014
Mathematics

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what is the number 21 a prime or composite

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mariamikayla mariamikayla

20-09-2014

[tex]21|3 \\ 7|7 \\ 1 \\ \\ 21=3*7 \\ \\ D_{21}= \{1;3;7;21\} \\ \\ it \ means \ that \ 21 \ is \ composite \ number[/tex]

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Аноним Аноним

11-08-2021

Answer:

composite

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