Verbal Reasoning - Mental Ability Questions

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

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

ORGANISATION

Find the odd word/letters/number from the given alternatives.

Find the odd word/letters/number from the given alternatives.

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

INFORMATION

Select the missing number from the given alternatives?

In a certain code language, “PRICE” is written as “1618935” and “VALUE” is written as “22112215”. How is “MARK” written in that code language?

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 o to 4 and the 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, F can be represented by 13, 21 etc and Y can be represented by 97,98 etc. Similarly, you have to identify the set of the word 'TONE'