Verbal Reasoning - Mental Ability Questions

In the following question, select the related word from the given alternatives.
Calendar : Date : : Index : ?

In a certain code language, "NATURE" is written as "TANURE". How is "LISTEN" written in that code language?

In a certain code language, “TRAVEL” is written as “WVFYIQ”. How is “TABLET” written in that code language?

Select the related word/letters/number from the given alternatives.
30 : 16 :: 24 : ?

Select the related word/letters/number from the given alternatives.
Farmer : Plough:: Painter: ?

Choose the related word/letters/number from the given alternatives.
AF : BE : : ? : DH

Six family members Pankaj, Gopi, Chetan, Dinesh, Akash and Vyom are standing around a circular table. Gopi is between Vyom and Chetan. Pankaj is between Akash and Dinesh. Vyom is to the immediate right of Dinesh. Who is opposite to Dinesh?

In the following question, select the related word pair from the given alternatives.

Power : Watt : : ? : ?