which of the following numbers are co price
1. 18 and 35
2. 15 and 37
3. 30 and 415
4. 17 and 68
5. 216 and 215
6. 81 and 16
Answers
Step-by-step explanation:
(a) Factors of 18 = 1, 2, 3, 6, 9,18
Factors of 35 = 1, 5, 7, 35
Common factor =1
Since , both have only one common factor, i.e., 1, therefore, they are co-prime numbers.
(b) Factors of 15 = 1, 3, 5,15
Factors of 37 = 1, 37
Common factor = 1
since, both have only one common factor, i.e., 1, therefore, they are co-prime numbers.
(c) 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
(d) Factors of 17 = 1, 17
Factors of 68 = 1, 2, 4, 17, 34, 86
Common factor = 1, 17
Since, both have more than one common factor, therefore, they are not co-prime numbers
(e) Factors of 216 = 1, 2, 3, 4, 6, 8, 36, 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.
(f) 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.hope it will help
Answer:
1.18 and 35 is a correct answer.