Question

Which of the following numbers are co prime ?
a. 13. 14. b. 8. 20 c. 31. 59 d. 34. 85

Answer 1

Answer:

a and c is a co prime because it hcf is 1.

Step-by-step explanation:

14=13×1+1

13=1×13+0

hcf is 1.so it is a co prime.

b.20=8×2+4

8=4×2+0

hcf is 4 so,it is not a co prime.

c.59=31×1+28

31=28×1+3

28=3×7+1

3=1×3+0

hcf is 1 so,it is a co prime.

d.85=34×2+17

34=17×2+0

hcf is 17 so it is not a co prime.

I hope It will help you