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Mathematics 15 Online
OpenStudy (anonymous):

Which is a prime number? A. 39 B. 49 C. 81 D. 89

OpenStudy (anonymous):

Prime numbers are numbers that can only be divided by themselves and 1

OpenStudy (anonymous):

so use you calculator and check each number to see if i can be divided by anything besides 1 or itself

OpenStudy (anonymous):

EX: 39/3=13 so 39 is not a prime number

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