6 : 8 :: 3 : ?

Select the option that is related to the fifth number in the same way as the second number is related to the first number and fourth number is related to third number.
121 : 145 :: 49 : 65 :: 169 :?

12 : 30 : : 20 ?

Direction: Select the related word from the given alternatives.

36  : 6 :: 441 : ?

Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E. g. 13 – Operations on 13 such as adding / subtracting / 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)

(16, 7, 112)

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.)

? : 63 : : 08 : 25

In the following questions, select the related number from the given alternatives.
850 : 863 :: 430 : ?