Question

Which pair of numbers is relatively prime? A. 108 and 57 B. 21 and 183 C. 55 and 121 D. 60 and 151

Answer 1

Answer:

60 and 151

Step-by-step explanation:

Relatively Prime numbers:

• Two integers are relatively prime (or co-prime) if there is no integer greater than one that divides them both (that is, their greatest common divisor is one).
• For example, 12 and 11 are relatively prime.
• But 12 and 18 are not relatively prime.

a) 108 and 57

They are not relatively prime because they have a common factor 3.

b) 21 and 183

They are not relatively prime because they have a common factor 3.

c) 60 and 151

There are no shared common factor other than 1, hence, they are co-prime.

Answer 2

B. 21 and 183
This is because 21 is odd and 183 is prime



(I guess)