Question

I need HELP in 5 min!!!

What is the sum of the composite numbers between 10 and 20 (not including 10 and 20)?⊕

Answer 1

75

Explanation:

By "composite" we mean "numbers that can be factored further."

The numbers between 10 and 20 but not including 10 or 20 are:

12, 14, 15, 16, 18

12, 14, 15, 16 and 18 are all composite numbers (all can be factored).

Their sum is 75.