logical reasoning

A leading socialite decided to organize a dinner and invited a few of her friends. Only the host and the hostess were sitting at the opposite ends of a rectangular table, with three persons along each side. The pre-requisite for the seating arrangement was that each person must be seated such that atleast on one side it has a person of opposite sex. Maqbool is opposite Shobha, who is not the hostess. Ratan has a woman on his right and is sitting opposite a woman. Monisha is sitting to the hostess’s right , next to Dhirubhai. One person is seated between Madhuri and Urmila who is not the hostess. The men were Maqbool, Ratan, Dhirubhai and Jackie, while the women were Madhuri, Urmila, Shobha and Monisha.

Question 1:  The eighth person present, Jackie, must be
I. the host
II. Seated to Shobha’s right
III. Seated opposite Urmila

(a) I only
(b) III only
(c) I and II only
(d) II and III only

Question 2: Which of the following persons is definitely not seated next to a person of the same sex?
(a) Maqbool
(b) Madhuri
(c) Jackie
(d) Shobha

Question 3: If Ratan would have exchanged seats with a person four places to his left, which of the following would have been true after the exchange?
I. No one was seated between two persons of the opposite sex. (e.g. no man was seated between two women)
II. One side of the table consisted entirely of persons of the same sex.
III. Either the host or the hostess changed seats.

(a) I only
(b) II only
(c) I and II only
(d) II and III only

Question 4: If each person is placed directly opposite her spouse, which of the following pairs must be married?

(a) Ratan and Monisha
(b) Madhuri and Dhirubhai
(c) Urmila and Jackie
(d) Ratan and Madhuri

Explanation

The correct approach to solve this question is to make a diagram of the seating arrangement. Draw a table and place the different individuals on it, according to the logic provided.
The correct seating arrangement can be depicted as shown below:

Answer 1: c
As we can see from the above diagram and the information given to us, Jackie is the host and also sitting on Shobha’s right. Hence (c) is the correct answer.

Answer 2: d
Refer to the above diagram and the information given to us. We can see Shobha is siting next to Jakie and Dhirubhai. Therefore, according to the information given, she is the only person who is not seated next to a person of the same sex.

Answer 3: a
In the given question, we are provided with extra information. Let us build another figure, according to the information provided:

According to the above, statement I is correct as no man is sitting between the two women. Also, no woman is sitting between the two men. We can see that statements II and II are false. Hence, the correct answer: option a.

Answer 4: a
From the figure given above, we can that only Ratan & Monisha are sitting opposite to each other. Since we are provided the additional information (if each person is placed directly opposite her spouse), we can see they are the married couple.