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Mathematics 10 Online
OpenStudy (anonymous):

Which number is composite? A. 79 B. 87 C. 89 D. 97

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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