Verbal Reasoning - Mental Ability Questions

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

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? a_c_e_b_de

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C A E, F D H, I G K, ?

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

XPK, VNJ, TLH, RJE, ?

Kathir is senior of Ganesh. Ganesh is senior of Apparu. Apparu is junior of Raju. Raju is junior of Ganesh. Who is the most senior?

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

68, 72, 65, 69, 62, 66, _?__

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
-7.25, -5.75, -4.25, -2.75, ? , 0.25

In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

5 - 6 + 30 x 8 ÷ 16 = ?