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
2520
4, 6, 8, 9
If the number can be evenly divided (no remainder) by any other number besides '1' and itself,then it's a composite number. We only have to find one more 'factor'.1,212 can be evenly divided by: 1, 2, 3, 4, 6, 12, 101, 202, 303, 404, 606, and 1,212.We only had to find one other factor besides '1' and 1,212 in order to prove it composite.But we found ten more. So it's definitely composite.