Verbal Reasoning - Mental Ability Questions

In a certain code language, "BRING" is written as "25698" and "JAIL" is written as "4367". How is "BRINJAL" written in that code language?

Fire : Burn :: Water : ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

In a certain code language, "DISORDER" is written as "OSIDREDR". How is "PRACTICE" written in that code language?

In these questions, the relationship between two elements is shown in the statements. These statements are followed by two conclusions.
Statement:
Y > A < N, Y = B <P
Conclusion:
I. P > A
II. N > B

There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Contamination : Food :: Infection : ?

P and Q are sisters. R and S are brothers. P's daughter is R's sister. What is Q's relation to S?

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

ABC, BDF, DHL, ?