What are the composite numbers from 1 to 20?

Well, hello there! Composite numbers are like a beautiful bouquet of flowers - they have more than two factors, just like how a flower has petals surrounding its center. In the range from 1 to 20, the composite numbers are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, and 20. Remember, each number is special in its own way, just like every brushstroke on a canvas adds to the beauty of a painting.