Hello.
A composite number has more than 2 factors; it's divisible by 1, itself, and something else.
Let's find the composite numbers smaller than 18.
The composite numbers are
4, 6, 8, 9, 10, 12, 14, 15, 16.
I hope it helps.
Have a nice day.
[tex]\boxed{imperturbability}[/tex]
