Answer:
6,8
Step-by-step explanation:
Co-prime numbers are the numbers whose common factor is only 1. There should be a minimum of two numbers to form a set of co-prime numbers. Such numbers have only 1 as their highest common factor, for example, {4 and 7}, {5, 7, 9} are co-prime numbers. Co-prime numbers need not be prime numbers always.
here the common factor between 5,7 is 1
the common factor between 11,13 is 1
but the common factor between 6,8 is 2 ,48......
thus 6,8 is the answer
