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algol [13]
3 years ago
6

Is 21 a prime number?

Mathematics
2 answers:
Marina CMI [18]3 years ago
8 0
21 is not a prime number, its a composite number because its divisible by 3 and 7
and prime numbers only have 1 and its self as factors..
Hope it helps :D

AleksandrR [38]3 years ago
3 0
No.
7×3=21
7×1=21
A prime number can only be multiplied by 1 and itself.
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