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.

RS, WX, ? , GH

A truck travels 36 km North, then it turns West and travels 9 km, then it turns South and travels 50 km, then it turns to its left and travels 9 km. Where is it now with reference to its starting position?

In the following question, select the related letters from the given alternatives.
ELQZ : AJOV : : VXTD : ?

Select the related word/letters/number from the given alternatives. Coins : Mint :: Bricks : ?

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

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

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?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
l_n_o_m_lm_o