. . . "[quote=Bunuel]The Official Guide For GMAT?? Quantitative Review, 2ND EditionIf y is an integer, is y^3 divisible by 9 ?(1) y is divisible by 4.(2) y is divisible by 6.Statement 1 : It says y is a multiple of 4 i.e. y=4k , but here k may or may not be a multiple of 3 and thus it is not sufficient to say if y^3 will be divisible by 9.Statement 2 : It says y = 6k and thus y^3=216(k^3) ; 216 being d" .