A number is composite if it has factors apart from 1 and the number itself. Otherwise it is prime. All even numbers (except 2) are composite.
90 is a composite number because it has more than two factors
prim
prime
It is composite.
Composite.
Composite
98 is an even number. The only even prime is 2, so 98 is not prime. Therefore it is composite. That's one logic method. Another would be to show the factors (other than 1 and 98) such as (49 x 2) or (7 x 14). Since it as factors other than 1 and itself, then it is composite.
5 is prime
Composite, yes.
Prime.
28 is composite.
Prim and Proper,