24:27 = ? :: 81

Direction: From the given alternatives select the word which cannot be formed using the letters of the given word
SEGREGATION 

In each of the following questions, select the related letter/word/ figure/ number from the given alternatives.
Ramanujan: Mathematician:: Sushruta:?

A series is given, with one term missing. Choose the correct alternative from the given options that will complete the series.
51    (?)    57      65      81    

Pointing to a girl in the picture, Sarita said, " She is the mother of Neha whose father is my son." How is Sarita related to the girl in the picture?

Select the option that has the same relationship with the third letter group as the second letter group with the first letter group?
KSJ : MUL :: RCU :?

30 : 130 :: ? : ? 

If 246*2 = 6, 870*3 = 11, then what should 735*5 be?