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OpenStudy (anonymous):
Which number is composite? A. 79 B. 87 C. 89 D. 97
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OpenStudy (mathstudent55):
All numbers are odd, so none are divisible by 2. Try dividing them by 3, and see if any of them divides evenly.
OpenStudy (anonymous):
can you just tell me the answer
OpenStudy (ineedserioushelp):
He can't tell you that the answer is B. (even though it is) He has to help you understand WHY it is.
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