Verbal Reasoning - Mental Ability Questions

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
PON, LKJ, GFE, ?

Select the related word/letters/number from the given alternatives.
ABDE : FGIJ :: IJLM : ?

Raj is facing north. He cycles for 8 km, then turns towards the south-east direction to move 10 km and from there, he moves 6 km towards the west. In which direction/place is he from his original position?

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

Introducing a woman, a boy says, "She is the wife of my grandfather's son". How is the woman related to the boy?

If 12 (20) 16 and 21 (35) 28, then what is value of A in 48 (80) A ?

In a certain code language, “LUNGS” is written as “OWQIV”. How is “HEART” written in that code language?

A is D's brother. D is B's father. B&C are sisters. How is C related to A?