Question

Which of the following pair of numbers is co-
prime?
(a) 6 and 8
(b) 14 and 21
(c) 18 and 35 (d) 39 and 65​

Answer 1

Answer:

(a)  is not    

(b) is not

(c) is a co prime number    

(d) is not

Step-by-step explanation:

(a) 6 and 8 have a common factor of 2  

(b) 14 and 21 have a common factor of 7    

(c) 18 and 35 have no common factor except 1  

(d) 39 and 65 have a common factor of 13