Verbal Reasoning - Mental Ability Questions

The question below consists of a question and three statements numbered I, II and III given. You have to decide whether the data provided in which of the statements are sufficient to answer the question. Choose your answer from the options based on this.

How is M related to R?

I. T, the only son of M, has two sisters.

II. M’s son is the brother of the only sister of R.

III. R and T are children of M.

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
72 x 9 - 14 + 2 = ?

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

BCD, EFG, IJK, NOP, TUV ?

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

PRQ, UWV, ZBA, ? , JLK

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

DG, JM, PS, VY, ?

Find the missing number?

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

BB, DZ, GW, KS, ?

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

?, flight lieutenant, squadron leader, wing commander