Verbal Reasoning - Mental Ability Questions

If 'x' means 'addition', '­' means 'division', '/' means 'subtraction' and '+' means 'multiplication', then which of the equation is correct

Mathur's uncle's daughter's brother is Salmi. How is Sonm related to Mather? 

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
250, 275, 301, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

9, 17, 44, 108, 233, ?

Select the related word/letters/number from the given alternatives. MOLTU : ? :: HOPE : IPQF

In the following question, select the related letter from the given alternatives.
DE : O : : AF : ?

If 'god id fair' = 'ge se fa', 'who is god' = 'ge we fa' and 'you are god' = 'ae le fa, which code does represent 'is'?