Verbal Reasoning - Mental Ability Questions

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B. A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B.  Which of the following is a pair of females ? 

A man walks 20 m towards north, then he turns right and walks 3 m, then turns left and walks 4 m and from there he walks 4 m towards east. How far and in which direction is he from his initial position?

284 028 in word form?

Which letter has at least one line of symmetry?

Introducing a girl, Poonam says, "She is the daughter of the only sister of the son of my mother". How is that girl related to Poonam?

Mohan said 'This girl is the wife of grand­son of my mother'. How is Mohan related to that girl?

In a certain code language, “PRIME” is written as “VNRIK”. How is “MICRO” written in that code language?

In the following question, select the missing number from the given series.
19, 11, 13, 16, 15, 17, 13, 19, 21, ?