4 & 9
The numbers 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 are the first ten composite numbers.
12
composite numbers from one to ten: 4, 6, 8, 9, 10
All even numbers greater than 2 are composite.
There are 8 square numbers between 0 and 100. 4, 9, 16, 25, 36, 49, 64, 81
The numbers 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 are the first ten composite numbers.
There are infinitely many composite numbers. There are, therefore, infinitely many subsets of ten such numbers. There are, therefore, infinitely many possible sums.
There are more than ten composite numbers and what they have in common is that they all have more than two factors whereas prime numbers have only two factors which are themselves and one.
The sum first Prime number is (2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 ) = 129 The sum of the first composite numbers is (4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18) = 112 The difference is 129 - 112 = 17 !!!!!
The only prime number in the 90s is 97. So out of ten numbers one is a prime number and the remaining nine numbers are composite numbers. So 90s comprises of both prime numbers and composite numbers.
2520
4, 6, 8, 9, 10, 12, 14, 15, 16, 18 are the first ten composite numbers