Verbal Reasoning - Mental Ability Questions

In the following question, select the missing number from the given series.
9, 18, 72, 576, ?

Introducing a girl, a boy says, "She is the daughter of my father's only brother­in­law". How is the girl related to the boy?

In the following question, select the missing number from the given series.
7, 19, 42, 87, ?

Akhil is the maternal uncle of Rashmi. Rashmi is the daughter of Ramesh. How is Ramesh related to Akhil?

If 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

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

9, 1331, 18, 121, 27, ?

Select the related letters from the given alternatives.
WUS : DFH :: MKI : ?

If L denotes 'x', M denotes '÷' , P denotes '+' and Q denotes '-'  then 16P24M8Q6M2L3