In order to figure that out, you must know a and b. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.
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It would be composite because a=1 and b=5 so it would be 3+1+6+5=15, and 15 can be divided by 3 into 5.
Composite. It is divisible by 3 for any n.
yes b/c 1 is neither prime or composite
It's even. All even numbers (except for 2) are composite.
4, composite. 67, prime.