The composite numbers in that range are 10, 12, 14, 15, 16, 18, 20. I don't know if you're including 10 and 20 or not. Add them up however you like.
Chat with our AI personalities
The sum is 75.
What is the sum of the composite numbers less than 10?4 + 6 + 8 + 9 = 27
2 composite numbers whose prime factorization have a sum of 10 are 30 (2+3+5=10) and 21 (3+7=10).
The numbers 4, 6, 8, 9, 10 are composite numbers between 1 and 10 (including 10).
There are infinitely many composite numbers. There are, therefore, infinitely many subsets of ten such numbers. There are, therefore, infinitely many possible sums.