Verbal Reasoning - Mental Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with someLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given options

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.

If BORDER is coded as 579649, then ORDER can be coded as