yeas they are because 2 relitivly Prime number must have 1 as their gcf.
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The prime numbers between 15 and 30 are: 17, 19, 23 and 29
There is an infinite list of them, including 14 and 16.
The numbers between 10 and 20 that are not prime are 12, 14, 15, 16 and 18. So 15 is the odd number and the rest are even numbers.
The only prime factor of 16 is 2.
14, 15, 14 It is the percentage of prime numbers in each ascending group of 100 numbers.