Verbal Reasoning - Mental Ability Questions

In a certain code language, 'x' represents '+', '÷' represents 'x', '-' represents '÷' and '+' represents '-'. Find out the answer to the following question.

5 + 10 x 21 ÷ 5 - 15 = ?

Error : Blunder :: ___ : Excellent

Rahul moves 5 km towards south and then takes a left turn to move 5 km more. Again, he takes a left turn and moves 10 km and finally, he moves 5 km towards west. In which direction is he now from his initial position?

In a certain code language, “WARD” is written as “44” and “LOAD” is written as “30”. How is “BRIT” written in that code language?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
FU, LO, RI, ?

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

Nitrogen fixation, Ammonification, Nitrification, ?

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

Responsibility

Rearrange the jumbled letters to make meaningful words and then select the one which is different.