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Gwar [14]
3 years ago
12

How i know what number is prime or composite

Mathematics
2 answers:
Helga [31]3 years ago
7 0
A prime number is a number that can have factors that is only 1 and itself. A composite number is a number that can have many differnt factors.
Airida [17]3 years ago
5 0
Prime Number: A number whose only 2 factors are 1 and itself

Composite: A number which has more factors other than 1 and itself.


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Okay, 
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You divide "405" by the amount of numbers there are.

so "5" into "405"
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To check our work, we can multiply 81 by 5. 
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