Verbal Reasoning - Mental Ability Questions

A migrating bird flies 40 km North, then turns East and flies 50 km, then turns North and flies 110 km, and turns to its left and flies 50 km. Where is it now with reference to its starting position?

What number should come in place of ?

In the following question, select the related letters from the given alternatives.
JPSW : LQUX : : MRFT : ?

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
CFE, ILK, ORQ, ?

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

Pointing towards a boy, a girl says, "He is the only son of my mother's brother". How is the girl related to the boy ?

Choose the related word/letters/number from the given alternatives.
Nest : Bird : : Den : ?