Analogy Questions

In the following question, select the related letters from the given alternatives.
BPTW : CQUX : : CHNS : ?

Select the related word/letters/number from the given alternatives.
36 : 25 : : 100 : ?

Select the related word/letters/numbers from the given alternatives:
3 : 243 :: 5 : ?

Select the related word from the given alternatives.
Cotton : White :: Coal : ?

Find out the odd word/letters/number/number pair from the given alternatives.

Select the related word/letters/number from the given alternatives.
BCD : YXW : : FGH : : ?

In the following question, select the odd word from the given alternatives.

In the following question, select the related number from the given alternatives.
48 : 63 : : 80 : ?