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OpenStudy (anonymous):
is 81 a prime number is 81 a prime number @Mathematics
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OpenStudy (anonymous):
No, it has more factors than 1 and itself.
OpenStudy (anonymous):
No because it can also be divided by 9.
OpenStudy (anonymous):
how about 91
OpenStudy (anonymous):
no, 7 and 13 are other factors
OpenStudy (anonymous):
Can you help me ndog33
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OpenStudy (anonymous):
sure what do you need
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