Verbal Reasoning - Mental Ability Questions

Choose the related word/letters/number from the given alternatives.
NPR : GHI : : TVX : ?

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 word missing. Choose the correct alternative from the given ones that will complete the series.
rupees, arena, pursue, spare, separate, ?

Pointing to a man in a photograph, Anitha said, "His mother's only daughter is my mother." How is Anitha related to that man?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

P_P_RPQ_S_Q_ST

If north-­west becomes south, north­-east becomes west and so on, then east will become which direction?

A man travels 10 km towards west, then he takes a turn towards north-­east and travels 20 km in the direction. He again takes a turn towards south-­east and covers 5 km. Taking starting point as the origin, in which direction is he now?

In each of the following questions, four words have been given out of which three are alike in some manner, while the fourth one is different. Choose the word which is different from the rest.