Resistors in a cube

 Resistors in cube CD stand of three dimensional resistor arrangements what happens is unless we do some kids of slow analysis it is hard for us to see say which one which arms don't have current in it in this particular example i3 is equal to zero into of the vertical arms only two of them right so that means depending up on the cemetery some of the arms may not be having currency it so this can be found only through kids of flower analysis maybe we can try with the symmetry method but 100% it cannot be innocent once you know that we can use that to reduce the complicated circuit to make it simplify the circuit to find the R effective