It is 31 because it has only two factors which are itself and one
5 is but 15 is not a prime number
prime number is a number that could only be divided by itself and one. odd numbers are naturally not divisible by 2 but odd numbers can be divisible by other numbers. one example is 15. 15 is divisible by itself and one but also by 3 and 5.
The prime factors of 15 are: 3, 5
5 is prime.
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors
3*5 = 15 in prime numbers
5 is but 15 is not a prime number
prime number is a number that could only be divided by itself and one. odd numbers are naturally not divisible by 2 but odd numbers can be divisible by other numbers. one example is 15. 15 is divisible by itself and one but also by 3 and 5.
The prime factors of 15 are: 3, 5
Number 17 is but 15 isn't as 5x3 isn't a prime number
15 is composite number
No because 2 is an even number which is also a Prime number that has only two factors which are itself and one.
No. 15 is the product of two prime numbers: 3 and 5
There is only one square number from 5-15: 9. This can be written as the sum of 2 and 7, which are prime numbers.
5 is prime.
15
Prime numbers are those which are divisible only by 1 and the number itself... Example: 7 is divisible by no number other than 7 and 1. Relatively prime numbers are those pairs of numbers which have no common divisor other than one. Example: (15,16) Factors of 15:1,3,5,15 Factors of 16:1,4,16 Common factor of 15 & 16 is 1, hence 15 & 16 are relatively prime.