Because they don't have any other factors in common.
Chat with our AI personalities
Two numbers are relatively prime if their GCF is 1.
The GCF of any two odd numbers is always odd. The GCF of any two even numbers is always even. The GCF of an odd and an even number is always odd.
23 and 29 are both prime numbers. The GCF of any two prime numbers is 1.
Their GCF is 1.
The GCF of two consecutive numbers is always 1. The GCF of any set of numbers can't be greater than the smallest of the differences between the numbers.