All even numbers greater than 2 are composite.
To prove whether a number is composite, factor it. A number having any factor besides 1 and itself is composite.
composite
10 is the only composite factor of 10.
composite numbers from one to ten: 4, 6, 8, 9, 10
It is composite because it has more than 2 factors
Show that it has more than two factors.
12
129 - 112 = 17
It is composite. It ends in a 6, which is an even number, and the only even prime is 2. You can prove it to be composite by simply dividing it by two.216/2=108
4, 6, 8, 9
2520
There are more than ten composite numbers and what they have in common is that they all have more than two factors whereas prime numbers have only two factors which are themselves and one.