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OpenStudy (anonymous):
Which of the following is true? 21 is a composite number because one and twenty-one are its only factors. 13 is a prime number because it is only divisible by one and itself. 16 is a prime number because it is divisible by 4. 28 is a composite number because 82 is a prime number.
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ganeshie8 (ganeshie8):
which one makes sense to u
OpenStudy (anonymous):
confused
OpenStudy (anonymous):
im thinking either the 1st one or the 4th one?
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