Asked by makeeda

which of following is not a prime number?
A)17
B)23
C)31
D)51
Answered by Luv4ever
What do you think? First of all go on to Google and look up prime numbers. You'll get a way better understanding of them in a small amount of time. I'll give you one hint: 51 is a prime number because 3 and 17 are it's factors.
Answered by PsyDAG
Luv4ever has a typo.

51 is <B>NOT</B> a prime number because 3 and 17 are it's factors.
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