Question

which of the following is a pair of co- prime numbers?
A 9,16
B 8,18
C 9,12
D 15 , 25​

Answer 1

Answer:

not any number is co-prime

Answer 2

Answer:

A

Step-by-step explanation:

A. factors of 9 = 1,3,9

16= 1,2,4,8,16

yes it is a co-prime number

B. factors of 8 = 1,2,4,8

18= 1,2,3,9,18

no it is not a co- prime number because it have 2 common factor= 1,2

C. factors of 9= 1,3,9

12= 1,2,3,4,6,12

no it is not a co- prime number because it have 2 common factor= 1,3

D. factors of 15=1,3,5

25=1,5,25

no it is not a co- prime number because it have 2 common factor= 1,5