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.
composite numbers between 11 and 21:12 14 15 16 18
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 !!!!!
Composite numbers between 6 and 20 are 8, 9, 10, 12, 14, 15, 16, and 18.
13, 15
No, they are not. You can add two composite numbers, 15 and 14 for example, and get a sum, 29, that is prime.
There are 7 composite numbers between 5 to 15 they are- 6,8,9,10,12,14,15
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.
The composite numbers between 10 and 20 are 12, 14, 15, 16 and 18.
composite numbers between 11 and 21:12 14 15 16 18
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 composite numbers between 11 and 19 are 12, 14, 15, 16 and 18
4
Composite numbers between 6 and 20 are 8, 9, 10, 12, 14, 15, 16, and 18.
The sum is: 12+14+15+16+18 = 75
13, 15
It is: 12+14+15+16+18 = 75