Verbal Reasoning - Mental Ability Questions

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

XBC,WFG,VJK,?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
Asia, Africa, North America, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
NM, PK, SI, ?

If '+' stands for multiplication, '-' stands for addition, 'x' stands for division, then what is the value of 128 + 9 - 16 x 4 = ?

In a certain code language, “TRUMP” is written as “46321” and “GRAIN” is written as “76598”. How is “GRUNT” 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.

10, 22, 46, ?

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

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