Verbal Reasoning - Mental Ability Questions

In the following question, select the related letters from the given alternatives.
JPC : GMZ : : PUV : ?

In the following question, select the odd word from the given alternatives.

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

56 ÷ 8 + 12 - 72 = ?

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

10 + 20 x 10 ÷ 20 - 8 = ?

If '+' means '/', '/' means '­','­' means 'x', 'x' means '+', then 24+8/2­6x6=?

P is the brother of Q. Q is the brother of R. P is the son of S. Based these three statements, much of the following statements cannot be definitely true?

Select the related word/letters/number from the given alternatives. MOLTU : ? :: HOPE : IPQF