Verbal Reasoning - Mental Ability Questions

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

6 x 6 ÷ 10 - 8 + 2 = ?

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

hello, lower, error, organ, tense, ?

In the following question, select the related word pair from the given alternatives.

Power : Watt : : ? : ?

 In a certain code language, “PRANK” is written as “RUESQ”. How is “RATES” written in that code language?

In the following question, select the related number from the given alternatives.
243 : 819 : : 163 : ?

In the following question, select the related number from the given alternatives.
AKP : 1121256 : : LNO : ?

Pointing towards a girl, Chetan said "She is the daughter of the only child of my grandmother". How is Chetan related to that girl?

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Threatened