composite numbers between 11 and 21:12 14 15 16 18
5 and they are 2,3,5,7,11 2 3 5 7 11
12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers
13, 15
39
The composite numbers between 11 and 29 are 12,14,15,16,18,20,21,22,24,25,26,27 & 28.
composite numbers between 11 and 21:12 14 15 16 18
11 composite 8 prime 1 neither
5 and they are 2,3,5,7,11 2 3 5 7 11
12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers
The composite numbers between 11 and 19 are 12, 14, 15, 16 and 18
All numbers other than 11, 13 ,17, 19 ,23,29, 31 are composite numbers. eg 10,12,14,15, are composite numbers.
11 numbers 2, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 * * * * * NO! 2 is a prime, not a composite!
13, 15
39
11, 13, 17, 19, 23, 29 are the primes between 10 and 30 so the composite numbers are all the others. 12,14,15,16,18,20,21,22,24,25,26,27,28, and 30 are the composite numbers between 10 and 30.
Their sum is 37.