Verbal Reasoning - Mental Ability Questions

In the following question, select the missing number from the given series.
3, 4, 5, 4, 9, 10, 6, 16, 15, 9, 25, 20, 13, 36, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
efg _ _ eff _ ghhe _ eff _ gggh _ h

In the following question, select the related word pair from the given alternatives.

Nest : Bird : : ? : ?

A series is given,with one term missing. Choose the correct alternative from the given ones that will complete the series. CAR, GCO, KEL, OGI, ?

A is taller than B. C is taller than A. D is taller than E but shorter than B. Who is the tallest?

If M is the sister of Z , Z is the wife of P and P is the son of A, how Z relates to A?

P and Q are sisters. R and S are brothers. P's daughter is R's sister. What is Q's relation to S?

In a certain code language, 'TRUMPET' is written as '7591427' and 'SORROW' is written as '385586'. How is 'EMPRESS' written in that code language?