Verbal Reasoning - Mental Ability Questions

From the given alternative words, select the word which cannot be formed using the letters of the given word:

INTROSPECTION

Mother of K's father is the sister of G. S is the daughter of G. How is S related to K's father?

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. Select the correct alternative from the given ones that will complete the series.

A, D, I, P, ?

Find the missing term in the following question:-

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

Premonition

If EARTHQUAKE is coded as EKAUQHTRAE then ELECTORATE will be coded as ?

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

Grandfather