Data Sufficiency (DS) | Re: If x and y are positive integers such that x = 8y + 12, what is the

1) x=12u
u=1,2,3,4......
Than x=12, 36, 48,......
Y= x-12/8=0,3,4.....
different GCD-Not sufficient

2) Y=12z
x=8*12z+12=12(8z+1)--a
z=1, 2, 3, 4.....
Than y=12*1, 12*3, 12*4,....
x= 12*9, 12*17, 12*25, 12*33(do not calculate just plugin in a
Common between x&y is 12 hence sufficient

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