Verbal Reasoning - Mental Ability Questions

'A' and 'B' are brothers. 'C' and 'D' are sisters. A's son is D's brother. How is B related to C?

Pointing towards a man Soumya says, "His mother's daughter is my sister". How is Soumya related to the man?

In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.

7x6x8=678
8x9x7=987
6x5x7=567
5x4x6=?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

M_P_M_R_PM_PM_RR_P

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

AZ , CX , FU , ?

In the following question, select the related number from the given alternatives.
243 : 819 : : 163 : ?

In the following question, select the missing number from the given series.
1, 3, 6, 10, 15, ?

Some books are arranged one above the other. If a book is at 18th position from the top and 5th position from bottom then the total number of books is