Which of the following numbers are co-prime? |
(a) 18 and 35 |
(b) 15 and 37 |
(c) 30 and 415 |
(d) 17 and 68 |
(e) 216 and 215 |
(f) 81 and 16 |
Answer:
Number Factors Common factor Co-prime 18 and 35 18 = 1, 2, 3, 6, 9 and 18 35 = 1, 5, 7 and 35 1 Thus 18 and 35 are co-prime. 15 and 37 15 = 1,3,5 and 15 37 = 1 and 37 1 Thus 15 and 37 are co-prime 30 and 415 30 = 1,2, 3,5,6,15,30 415 = 1, 5.... 1, 5 Thus 30 and 415 are not co-prime 17 and 68 17 = 1 and 17 68 = 1, 2, 4, 17, 1, 17 Thus 17 and 68 are not co-prime 216 and 215 216=1, 2, 3, 4, 6....... 215 = 1, 5, 1 Thus 216 and 215 are co-prime 81 and 16 81 =1, 3, 9.... 16 = 1, 2, 4, 8, 16 1 Thus 81 and 16 are co-prime
You need to login to perform this action.
You will be redirected in
3 sec