Verbal Reasoning - Mental Ability Questions

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

K_L_K_LN_M_N

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

6,11,21,36,56,?

Boxing is related to Ring in the same way as Tennis is related to

Ramesh starts his journey by walking 2 kilometres towards North. Then he takes a right turn and walks 1 kilometre. Again takes a right turn and walks 2 kilometre. Now which direction is he facing?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
Millimetre, Micrometre, Nanometre, ?

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

Premonition

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