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Q: What is 18 19 20 21 22 23 24 25 are they composite or prime?

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It is 19 which is a prime number

wowo is it a composite number dang how did I not see that...

16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238

Mean (12, 18, 19, 20, 21) = 18

20

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19. It is prime.

It is 19 which is a prime number

21

It is composite.

20 is 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

It's composite.

September has thirty days. Of the numbers 1-30, the following are prime: 2,3,5,7,11,13,17,19,23,29. The others are composite, except 1 which is neither! So, 10 primes, 19 composites, and 1

wowo is it a composite number dang how did I not see that...

The number 19 it is between 18 and 20 and is a Prime Number.

Prime factors are for a specific number. The prime factors of 20 are 2, 2, and 5. The prime factor of 19 is 19. The prime factors of 18 are 2, 3, and 3.

It is 1 because 19 is a prime number

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