Q: Which is prime or composite 13 51 18 31 23 15 66 81?

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12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers

19. It is prime.

2 is a prime number. 18 is a composite number.

composite

The composite numbers between 11 and 19 are: 12 14 15 16 18 The other numbers, 11, 13, 17, and 19, are all prime.

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12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers

18 is composite.

19. It is prime.

Prime: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 Composite: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18

2 is a prime number. 18 is a composite number.

composite

It would be impossible to list them all, since numbers go on forever, but here are some of them: 2 - Prime 3 - Prime 4 - Composite 5 - Prime 6 - Composite 7 - Prime 8 - Composite 9 - Composite 10 - Composite 11 - Prime 12 - Composite 13 - Prime 14 - Composite 15 - Composite 16 - Composite 17 - Prime 18 - Composite 19 - Prime 20 - Composite 21 - Composite 22 - Composite 23 - Prime 24 - Composite 25 - Composite 26 - Composite 27 - Composite 28 - Composite 29 - Prime 30 - Composite 31 - Prime 32 - Composite 33 - Composite 34 - Composite 35 - Composite 36 - Composite 37 - Prime 38 - Composite 39 - Composite 40 - Composite 41 - Prime 42 - Composite 43 - Prime 44 - Composite 45 - Composite 46 - Composite 47 - Prime 48 - Composite 49 - Composite 50 - Composite

composite

21

The composite numbers between 11 and 19 are: 12 14 15 16 18 The other numbers, 11, 13, 17, and 19, are all prime.

The answer to the question that has been asked is "Yes".

Prime numbers are: 2, 5, 13, & 178, 18, 93, 117 are composite numbers.