Question

Question 5 (f)

Which of the following numbers are co-prime:
81 and 16

Answer 1

Two numbers having only 1 as a common factor are called co-prime numbers.
Factors of 81 = 1, 3, 9, 27, 81
Factors of 16 = 1, 2, 4, 8, 16
Common factor = 1
Since, both have only one common factor i.e. 1, therefore, they are co-prime numbers.