Question

which of the following is not a co prime A) 9,10 B) 7,17 C) 5,16 D) 23,46.​

Answer 1

Step-by-step explanation:

a)9,10 is co prime number because their H.C.F is 1.

Answer 2

Answer:

D) 23 , 46

Step-by-step explanation:

Co prime numbers are those pairs of numbers which have only one common factor that is 1 .

Prime number means the number which had to factors 1 and the number itself.

When there are two prime numbers then the to have maximum one common factor that is 1.

In all the three cases A) B) and C) the pairs of numbers have only one common factor.

But in option D) the pair has another common factor that is 23 .

As our rule says that the numbers must have only 1 as their common factor. So this pair of numbers is not co prime to each other.