Verbal Reasoning - Mental Ability Questions

Select the related word/letters/numbers from the given alternatives: DBCE : QOPR :: JLKI : ?

If EFMIJ means DELHI, then the last letter of the word got by decoding IQBOS is

In the following question, select the related word from the given alternatives.
Ampere : Electric current : : Fathom : ?

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

130, 450, 970, 1690, ?

Prem starts to school from his house and walks 400 metres towards north, turns left and walks 100 metres, turns left and walks 200 metres, turns left and walks 100 metres. How far he is away from his house?

Two rugby players start running from the same place on the pitch. Player A runs 20 m South, then turns to his left and runs 26 m. In the mean while Player B runs 12 m West, then he runs 6 m South, the he turns to his left and runs 38 m. Where is Player A with respect to Player B?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
I, V, ? , L

Select the related word/letters/numbers from the given alternatives:
3 : 243 :: 5 : ?