Which number come at the Question mark(?)
6 : 48 : 8 : ?

Three of the following four number-pairs are alike in a certain way and one is different. Find the odd one out.

Den is to Lion as Aviary is to 

Direction: In the following questions, select the related letters from the given alternatives.

Eye: Wink:: Heart:? 

Select the option in which the pair of letter-clusters share the same relationship as that shared by the given pair of letter-clusters.

TRACK : IAYPR :: ?

Direction (16-20): From among the given alternatives select the one in which the set of numbers is most like the set of numbers given in the questions.

 
Given set
6, 14, 30 

Direction: In the following question, select the related letters from the given alternatives. 

AG : IO :: EK : ?

Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.

PG : VM :: AB : ?