Pointing towards Rita, Sushant said I am the only son of her mother's son. How is Rita related to Sushant? 

ADCB : KNML :: EHGF : ? 

Pick an odd number in the given number series?

4 12 38 87 198

Sailu's mother is the daughter of Kalyan's sister. How is Kalyan's mother related to Sailu's mother?

Some friends are sitting on a bench. Anil is sitting near Anita and Ajay is sitting near Rekha. Rekha is not sitting with Amit. Amit is sitting at the left end of the bench and Ajay is sitting at the second position from the right end. Anil is sitting at the right side of Anita and Amit as well as. Anil and Ajay are sitting adjacent to each other.

Where is Amit?

In a certain code language, "CAGES" is written as " NADYB" and "SILVER" is written as "LZRIGR". How is "WATER" written in that code language? 

a_cacbc_baca_ _b 

Directions: Study the information carefully and answer the following questions:
A building has eight floors from 1 to 8 in such a way that ground floor is numbered 1, the above floor is
 numbered 2 and so on. The top most floor is numbered 8. Eight persons G, P, M, R, Q, A, D and C are staying each on one of these floors. A is staying on floor 6. There is a gap of three persons between G and R. C is staying on the topmost floor. Neither P nor M is staying on the floor 5. Q is staying middle of P and M. R is staying on the floor 1. M is not an immediate neighbour of G.

Who is staying on the floor no. 7?