Verbal Reasoning - Mental Ability Questions

In the following question, select the odd letters from the given alternatives.

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

Brazil, Russia, ? , China, South Africa

Select the related word/letters/number from the given alternatives.
25: 260 : : 30 : ?

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., 'L' can be represented by 12, 24 etc., and 'R' can be represented by 55, 67 etc. Similarly you have to identify the set for the word 'SENT'

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

B, D, H, P, ?

Choose the related word/letters/number from the given alternatives.
Nest : Bird : : Den : ?

Select the odd word from the given alternatives.

Johnny's father is the brother­in­law of Nisha's only sister. How is Johnny related to Nisha?