Verbal Reasoning - Mental Ability Questions

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Components

Courtroom : Judge :: Stadium : ___

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

A boy and a girl are facing each other. If the boy is standing at the north-west direction of the girl, in which direction is the girl to the boy?

Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words.

Knight: Rook: Bishop

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

? , Hexane, Heptane, Octane

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.

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

FU, GT, HS, IR, ?