6, 9, 15, 28, 51, and 91.
It is 15
13, 15
The composite numbers between 11 and 19 are: 12 14 15 16 18 The other numbers, 11, 13, 17, and 19, are all prime.
12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers
32 is a composite number while 13, 19 and 29 are prime numbers
They are all prime numbers except for 15 21 25 and 27 which are composite numbers
15 is composite number 17, 19 and 23 are prime numbers.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
The composite numbers between 11 and 19 are 12, 14, 15, 16 and 18
19. It is prime.
All numbers other than 11, 13 ,17, 19 ,23,29, 31 are composite numbers. eg 10,12,14,15, are composite numbers.
The two prime numbers 13*19=247