Verbal Reasoning - Mental Ability Questions

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
ENCYCLOPEDIA

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

BE, HK, NQ, ?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Superconductors

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

? , James Garfield, William McKinley, John F. Kennedy

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

7 x 10 ÷ 30 - 2 + 6 = ?

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?

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

VUT, ONM, GFE, ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

56 ÷ 8 + 12 - 72 = ?