Verbal Reasoning - Mental Ability Questions

Looking at a lady, Joey said, "She is the mother of my mother's mother-in-law's husband". How is the lady related to Joey's father?

Select the related word/letters/numbers from the given alternatives:
3 : 243 :: 5 : ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. PR, VX, BD, ?

If, 6x4= 12, 4x12= 24, 12x6= 36 then 6x9= ?

In a certain coding language, 'Ginger is a root' is written as 4123, 'A tree has a root' is 75422 and 'Tree is green' is 385. Which digit represents 'root'?

In the following question, correct the equation by interchanging two signs.
4 – 10 x 5 + 9 ÷ 3 = 51

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series:

8,24,12,?,18,54

Select the related letters from the given alternatives.
DFI : ACF :: OQT : ?