How many pairs of letters are there in the word

Select the option that is related to the third number in the same way as the second number is related to the first number.

55 : 3136 :: 48 : ?

Select the related number from the given alternatives:

653:87:: 8327: ____

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

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

DARING: HWNEJK :: LODGES: ?

Select the letter cluster from among the given options that can replace the question mark (?) in the following series.

FCE, KHJ, ?, URT, ZWY

Four number-pairs are given, which of them three are alike in certain manner and one is different. Choose the different number-pair.

Three of the following letter-clusters are alike in some manner and hence form a group. Which letter-cluster does not belong to that group?

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

If 31 @ 9 = 24 and 53 @ 33 = 96, then 19 @ 47 = '?'.