Verbal Reasoning - Mental Ability Questions

If L denotes 'x', M denotes '÷' , P denotes '+' and Q denotes '-'  then 16P24M8Q6M2L3

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

BXM, EUP, HRS, ?

In each of the following questions, four words have been given out of which three are alike in some manner, while the fourth one is different. Choose the word which is different from the rest.

If in a certain language TEACHER is coded as QBXZEBO, then how is STUDENT coded in the same language?

In a certain code language, "DIAMOND" is written as "4895064" and "GAME" is written as "7953". How is "MANGO" written in that code language?

In the following question, select the related word pair from the given alternatives.
Ammeter : Current : : ? : ?

In a row of boys, Tarak is 18th from either end. How many boys are there in the row?

A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as shown in the given two matrices. The columns and rows of Matrix-I are numbered from 0 to 4 and that of Matrix-II are numbered from 5 to 9. A letter from these matrices can be represented first  by its row and next by its column ,for example 'H' can be represented by 32,41 etc and 'N' can be represented by 98,85 etc. similarly,you have to identify the set for the word ''IOTA''.