5 is but 15 is not a prime number
If the GCF of two numbers is 1 then the numbers are co-prime or a pair of numbers which have only 1 as their common factoris called co-prime.Let us check if 15 and 42 share any common factors other than 1.Factors of 15: 1, 3, 5 and 15.Factors of 42: 1, 2, 3, 6, 7, 21 and 42.As it can be seen that 3 is a common factor or GCF of 15 and 42.So, 15 and 42 are not co-prime.
The prime factors of 15 are: 3, 5
5 is prime.
Two prime factors which are 3 and 5
Two (or more) numbers are said to be co-prime if they have no prime factor in common. The numbers, themselves need not be prime. Thus, 14 (= 2*7) and 15 (= 3*5) are co-prime.
5 and 12 8 and 15
5 is but 15 is not a prime number
If the GCF of two numbers is 1 then the numbers are co-prime or a pair of numbers which have only 1 as their common factoris called co-prime.Let us check if 15 and 42 share any common factors other than 1.Factors of 15: 1, 3, 5 and 15.Factors of 42: 1, 2, 3, 6, 7, 21 and 42.As it can be seen that 3 is a common factor or GCF of 15 and 42.So, 15 and 42 are not co-prime.
The product of the prime numbers 3 and 5 is 15.
Co-prime numbers have a GCF of 1, that is, they don't share any common prime factors. If your number is 15, with a prime factorization of 3 x 5, pick a number that doesn't include 3 or 5. 2 x 11 is 22 15 and 22 are co-prime.
15 is not prime, so they cannot be.
The prime factors of 15 are: 3, 5
3*5 = 15 in prime numbers
5 is prime.
3 x 5 = 15
15 is the product of two prime numbers; 3 x 5