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Mathematics 12 Online
OpenStudy (anonymous):

Which of the following is true? 7 is a composite number because one and seven are its only factors. 9 is a prime number because it is divisible by 3. thirteen is a composite number because it is divisible by one and itself. twenty-three is a prime number because it is only divisible by one and itself.

OpenStudy (raden):

the last one is correct

OpenStudy (anonymous):

explain

OpenStudy (raden):

already explained in sentence :v

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