Select the odd letters/ word/ number from the given alternatives.

Directions: In the following question, there is some relationship between the two terms to the left of (: :) and the same relationship holds between the two terms to the right of (: :) is missing which is given in one of the four alternatives given below the question. Find out the term from amongst the alternatives.
JDRC : GGOF : : SPKW : ?

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

TRACK: MECTV: : POND : ? 

Enough: Sufficiency :: Excess:?

Funk: Vitamins: Curie: ? 

24:27 = ? :: 81

30 : 130 :: ? : ? 

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