3 is not a composite number.
3 is a Prime number because its factors are only 1 and itself.
No.
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69 is a composite number because it is a multiple of 3 and 23.
243 is a composite number because it has more than two factors
composite because 3 and 5 will go into it
It is a composite number because It is a divisible by 3.
No 28 is a composite number and not a multiple of 3