Question

Question 5 (e)

Which of the following numbers are co-prime:
216 and 215

Answer 1

Two numbers having only 1 as a common factor are called co-prime numbers.
Factors of 216 = 1, 2, 3, 4, 6, 8, 27, 36, 54, 72, 108, 216
Factors of 215 = 1, 5, 43, 215
Common factor = 1
Since, both have only one common factor i.e. 1, therefore, they are co-prime numbers.