Verbal Reasoning - Mental Ability Questions

If HEAR is written as KJHA, then MILK can written as

In the following question, select the related number from the given alternatives.
48 : 63 : : 80 : ?

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

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:

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

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

Select the missing number from the given responses.

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?