Question

Question 5 (c)

Which of the following numbers are co-prime:
30 and 415

Answer 1

Two numbers having only 1 as a common factor are called co-prime numbers.
Factors of 30 = 1, 2, 3, 5, 6, 15, 30
Factors of 415 = 1, 5, …….., 83, 415
Common factor = 1, 5
Since both have more than one common factor, therefore, they are not co-prime numbers.