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All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.

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12y ago

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Which of these numbers is not composite 15 18 19 20 21?

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It is 19 which is a prime number


Which of the numbers 1-20 are Prime and which are Composite?

21


What is a list of prime numbers and composite numbers?

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Is 20 a prime or composite or neither?

It is composite.


Is 20 a prime composite?

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


Is 20 a prime or composite?

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What are the prime and composite numbers between 10 and 30?

Prime numbers: 11, 13, 17, 19, 23, 29 Composite numbers: 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30


What is the significance of the number 19?

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Composite number between 10 and 20?

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What is the greatest common factor of 18 19 and 20?

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A number between 11 and 20 that is both composite and odd?

15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.