👉 A decemplex is a number that can be expressed as the sum of two or more positive integers. It is also known as a composite number, since it has at least one prime factor other than 2 and 3. The first few decemplets are 10 (two 5s), 20 (two 4s and one 2), 30 (three 3s), 40 (four 2s and two 5s), etc
