Verbal Reasoning - Mental Ability Questions

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

Scrupulous

17.Rana walks 20 m straight in north direction and 20 m to the right. Then every turning to his left he walks 5, 25 and 25 metres respectively. How far is he from his starting point now?

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

144, 256, 400, ?

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

VXK, QSF, LNA, GIV, ?

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., 'C' can be represented by 21, 43, etc. and 'U' can be represented by 75, 98 etc. You have to identify the set for the word 'ROAD'.

If "-" means "plus", "x" means "divided by", "÷" means "multiply" and "+" means "substraction", then

Select the related word/letters/number from the given alternatives. MOLTU : ? :: HOPE : IPQF

In the following question, by using which mathematical operators will the expression become correct?
15 _ 3 _ 4 _ 20