Question

10. Which of the following pairs of numbers is co-prime?

30 &45
16 & 81
17 & 68
25 & 100

Answer 1

Answer:

Option b(16 & 81)

Step-by-step explanation:

What is co prime :

The pairs which have only one common factor that is 1.

and 16 and 81 has only one common factor ie 1 there for they are co prime.

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