Select the number-pair in which the two numbers are related in the same way as are the two numbers of the following number-pair.
7:729

6 : 8 :: 3 : ?

24 : 60 : : 120 : ?

12 : 30 : : 20 ?

? : 63 : : 08 : 25

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

5 : 100 : : 6 : ?

Study the given pattern carefully and select the number that can replace the question mark (?) in it.
 First row: 73, 52, 75
 Second row:64, 41, 63
 Third row: 68, 47, ?

(NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. For example, 13 – Operations on 13 such as adding/deleting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

Direction: Select the related word from the given alternatives.

36  : 6 :: 441 : ?