MADE EASY FT 6 Q31 [closed]

Question

• The (r – 1)’s complement of a number can be found using formula (r^n – r^(–m )– N) where r is base of the number N having n digits and m digits in integral an fraction part respectively. We have been given some decimal numbers as shown below:
  (i) 325                    (ii) 325.893
  (iii) –819                 (iv) –517.67
  How many (r – 1)’s complement of above decimal numbers can be calculated using mentioned formula?