Verbal Reasoning - Mental Ability Questions

In a certain code, 'book is big' is written as 756; 'big is story' is 764 and 'story book is interesting' is 4356. Which digit represents 'interesting'?

In the following question, select the related word pair from the given alternatives. Pascal : Pressure : : ? : ?

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

AK, DQ, GV, JZ, ?

X drives 30 km south, then turns right and drives 30km, then turns left and drives 20 km and then turns left and drives 30 km. How far is X from his/her initial position?

Ramesh is richer than Satish but Jaya is less rich than Ramesh. Ram is less rich than Jaya but richer than Satish, but is not as rich as Ramesh. Ramesh is less rich than Navin. The richest amongst them is?

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

Scrupulous

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

4, 5.2, 6.4, ?, 8.8

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