G, M, and N are integers, M=X+6; G is the greatest common factor of M and N. G=?
1) N=2531
2) N=X+7

X and Y are positive integers. What is the maximum common divisor of X and Y?
a) X=Y+1
b) X is a multiple of 2

What is the greatest common factor of positive integers x and y?
1) The greatest common factor of and is 5
2) x and y are even