What is the greatest common factor of positive integers x and y?
(1) x and y share only one common factor.
(2) x and y are unique prime numbers.
OA is D
I don't understand how can[spoiler] S(1)[/spoiler] also be the answer. Suppose both x and y are multiples of 4 such as 12 and 20, the GCD of (4 *3, 4 *5) = 4
Another example both are consecutive integers such as 2 and 3, then GCD(2,3) = 1
Different values in both the examples.
Another thing, I have checked a lot of questions where they say GCD for 15, 10 is 5. From here we know that both are multiples of 5, and here they share only one factor. Am i correct ?
Thanks
(1) x and y share only one common factor.
(2) x and y are unique prime numbers.
OA is D
I don't understand how can[spoiler] S(1)[/spoiler] also be the answer. Suppose both x and y are multiples of 4 such as 12 and 20, the GCD of (4 *3, 4 *5) = 4
Another example both are consecutive integers such as 2 and 3, then GCD(2,3) = 1
Different values in both the examples.
Another thing, I have checked a lot of questions where they say GCD for 15, 10 is 5. From here we know that both are multiples of 5, and here they share only one factor. Am i correct ?
Thanks
