Find the odd-one out ?

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

In each of the following questions, certain pairs of words are given, out of which the words in all pairs except one, bear a certain common relationship. Choose the pair in which the words are differently related?

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

In the following question, select the one which is different from the other three responses.

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

Choose the related word/letters/number from the given alternatives.
 36 : 6 : : 441 : ?

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