Four of the following five are alike in a certain way so form a group. Which is the one that does not belong to that group? 

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

Direction: In the following question, select the related letters from the given alternatives.
Timid : Ass :: Cunning : ?

212 : 436 : 560 : ?

In the following question, select the related letter/letters from the given alternatives.
PAL : RDP : : MRF  :  ?

In the following question, select the related word from the given alternatives.
Triangle: Hexagon:: ?

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

Eye: Wink:: Heart:? 

Direction: Select the related word from the given alternatives.

6: 36 :: 9: ?