What are all odd composite numbers 1 to 100?

The odd composite numbers are 9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 81, 85, 87, 91, 93, 95, and 99.

Composite numbers are those numbers that can be expressed as the product of any two integers greater than 1. So they are all numbers that are not prime numbers.


9, 15, 21, 25, 27, 33, 35, 39, 45, 49,

51, 55, 57, 63, 65, 69, 75, 77, 81, 85,

87, 91, 93, 95, 99.