5 is but 15 is not a prime number
5 is prime.
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors
Number of Prime Numbers from 1 to 100 is 25. From 1 to 50 it was 15 From 50 to 100 it was 10
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.
3*5 = 15 in prime numbers
5 is but 15 is not a prime number
Number 17 is but 15 isn't as 5x3 isn't a prime number
15 is composite number
No. 15 is the product of two prime numbers: 3 and 5
5 is prime.
15
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors
Five is prime and a factor of both numbers.
factors
Number of Prime Numbers from 1 to 100 is 25. From 1 to 50 it was 15 From 50 to 100 it was 10
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.