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OpenStudy (anonymous):
Which is a prime number? A. 39 B. 49 C. 81 D. 89
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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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