.CA FINAL( FR )VALUATION OF GOODWILL

In PM in certain sums additional depreciation is reduced from cl..wdv of F.A.after increasing their value % given in question and shown net
figure in capital employed,whereas in certain sums they had not reduced additional depreciation from closing increased wdv of FA.and directly shown only increased value
of FA in capital employed..
Can any one guide me that ,what exactly we have to do for getting sum correct in exam...