Directions: Read the given information carefully and answer the questions given beside:
 
Certain number of persons sitting in a linear row and all of them are facing in north direction. Only ten persons sit to the left of E. F sits eight to the left of E. The person A sits fourth to the right of B. C sits to the immediate left of D. D sits third from the extreme right end of the row. Number of person sit between E and D is same as B and E. Only six people sit between A and C.
1
How many seats are there in the linear row?
» Explain it
D
Following the common explanations, we get "19 seats are there in the linear row".

Hence, option D is correct.

Final arrangement:
 
Person
(North)
    F   B       A   E         C D    
Seat
Number
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
Common Explanation
 
References:
 
D sits third from the extreme right end of the row.
 
C sits to the immediate left of D
 
Only six people sit between A and C.
 
The person A sits fourth to the right of B.
 
Inferences:
 
From above statements,
 
We don’t know the number of seats in a linear row. So we will solve based on the above hints.
 
Let the seat at extreme right end be 1 and its immediate left is 2 and so on in increasing order till left end.
 
D sits 3rd seat from right end (reference point-1)
 
C sits at 4th seat i.e. immediate left of D (reference point-2)
 
The person A sits at 11 seat i.e. six people sit between A and C (reference point-3)
 
B sits at 15th seat i.e. A sits fourth to the right of B (reference point-4)
 
By using above information we get the following seating as shown below,
 
Person
(North)
        B       A             C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
References:
 
Number of person sit between E and D is same as B and E.
 
Only ten persons sit to the left of E.
 
F sits eight to the left of E.
 
Inferences:
 
From above statements,
 
If we observe the seating there are 11 seats in between B and C.
 
As per 1st reference point, E sits in the middle of B and D. Therefore E sits at 9th seat i.e. 5 people sit to the right of E and 5 people sit to the left of E.
 
Given, only ten persons sit to the left of E. Therefore we conclude that there are 19 seats in the linear row.
 
Finally, F sits at 17th seat i.e. F sits 8th to the left of E (reference point-3)
 
All conditions get satisfied and we get the completed seating [19 seats] as shown below,
 
Person
(North)
    F   B       A   E         C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
» Explain it
D
Following the common explanations, we get "C sits 5th to the right of E".

Hence, option D is correct.

Final arrangement:
 
Person
(North)
    F   B       A   E         C D    
Seat
Number
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
Common Explanation
 
References:
 
D sits third from the extreme right end of the row.
 
C sits to the immediate left of D
 
Only six people sit between A and C.
 
The person A sits fourth to the right of B.
 
Inferences:
 
From above statements,
 
We don’t know the number of seats in a linear row. So we will solve based on the above hints.
 
Let the seat at extreme right end be 1 and its immediate left is 2 and so on in increasing order till left end.
 
D sits 3rd seat from right end (reference point-1)
 
C sits at 4th seat i.e. immediate left of D (reference point-2)
 
The person A sits at 11 seat i.e. six people sit between A and C (reference point-3)
 
B sits at 15th seat i.e. A sits fourth to the right of B (reference point-4)
 
By using above information we get the following seating as shown below,
 
Person
(North)
        B       A             C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
References:
 
Number of person sit between E and D is same as B and E.
 
Only ten persons sit to the left of E.
 
F sits eight to the left of E.
 
Inferences:
 
From above statements,
 
If we observe the seating there are 11 seats in between B and C.
 
As per 1st reference point, E sits in the middle of B and D. Therefore E sits at 9th seat i.e. 5 people sit to the right of E and 5 people sit to the left of E.
 
Given, only ten persons sit to the left of E. Therefore we conclude that there are 19 seats in the linear row.
 
Finally, F sits at 17th seat i.e. F sits 8th to the left of E (reference point-3)
 
All conditions get satisfied and we get the completed seating [19 seats] as shown below,
 
Person
(North)
    F   B       A   E         C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
3
How many seats are there between A and E?
» Explain it
B
Following the final arrangement, it's clear that there is only one seat between A and E. 

Option B is hence the correct answer.

Final arrangement:
 
Person
(North)
    F   B       A   E         C D    
Seat
Number
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
Common Explanation
 
References:
 
D sits third from the extreme right end of the row.
 
C sits to the immediate left of D
 
Only six people sit between A and C.
 
The person A sits fourth to the right of B.
 
Inferences:
 
From above statements,
 
We don’t know the number of seats in a linear row. So we will solve based on the above hints.
 
Let the seat at extreme right end be 1 and its immediate left is 2 and so on in increasing order till left end.
 
D sits 3rd seat from right end (reference point-1)
 
C sits at 4th seat i.e. immediate left of D (reference point-2)
 
The person A sits at 11 seat i.e. six people sit between A and C (reference point-3)
 
B sits at 15th seat i.e. A sits fourth to the right of B (reference point-4)
 
By using above information we get the following seating as shown below,
 
Person
(North)
        B       A             C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
References:
 
Number of person sit between E and D is same as B and E.
 
Only ten persons sit to the left of E.
 
F sits eight to the left of E.
 
Inferences:
 
From above statements,
 
If we observe the seating there are 11 seats in between B and C.
 
As per 1st reference point, E sits in the middle of B and D. Therefore E sits at 9th seat i.e. 5 people sit to the right of E and 5 people sit to the left of E.
 
Given, only ten persons sit to the left of E. Therefore we conclude that there are 19 seats in the linear row.
 
Finally, F sits at 17th seat i.e. F sits 8th to the left of E (reference point-3)
 
All conditions get satisfied and we get the completed seating [19 seats] as shown below,
 
Person
(North)
    F   B       A   E         C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
4
Four of the following five are alike in a certain way and thus form a group. Which of the following does not belong to the group?
» Explain it
E
Following the final arrangement, it's clear that only C sits on even numbered seat.

Remaining people sits on odd numbered seat. 

Option E is hence the correct answer.

Final arrangement:
 
Person
(North)
    F   B       A   E         C D    
Seat
Number
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
Common Explanation
 
References:
 
D sits third from the extreme right end of the row.
 
C sits to the immediate left of D
 
Only six people sit between A and C.
 
The person A sits fourth to the right of B.
 
Inferences:
 
From above statements,
 
We don’t know the number of seats in a linear row. So we will solve based on the above hints.
 
Let the seat at extreme right end be 1 and its immediate left is 2 and so on in increasing order till left end.
 
D sits 3rd seat from right end (reference point-1)
 
C sits at 4th seat i.e. immediate left of D (reference point-2)
 
The person A sits at 11 seat i.e. six people sit between A and C (reference point-3)
 
B sits at 15th seat i.e. A sits fourth to the right of B (reference point-4)
 
By using above information we get the following seating as shown below,
 
Person
(North)
        B       A             C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
References:
 
Number of person sit between E and D is same as B and E.
 
Only ten persons sit to the left of E.
 
F sits eight to the left of E.
 
Inferences:
 
From above statements,
 
If we observe the seating there are 11 seats in between B and C.
 
As per 1st reference point, E sits in the middle of B and D. Therefore E sits at 9th seat i.e. 5 people sit to the right of E and 5 people sit to the left of E.
 
Given, only ten persons sit to the left of E. Therefore we conclude that there are 19 seats in the linear row.
 
Finally, F sits at 17th seat i.e. F sits 8th to the left of E (reference point-3)
 
All conditions get satisfied and we get the completed seating [19 seats] as shown below,
 
Person
(North)
    F   B       A   E         C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

5
How many seats are there to the left of B?
» Explain it
C
Following the final arrangement, it's clear that there are Four seat to the left of B.

Option C is hence the correct answer.

Final arrangement:
 
Person
(North)
    F   B       A   E         C D    
Seat
Number
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
Common Explanation
 
References:
 
D sits third from the extreme right end of the row.
 
C sits to the immediate left of D
 
Only six people sit between A and C.
 
The person A sits fourth to the right of B.
 
Inferences:
 
From above statements,
 
We don’t know the number of seats in a linear row. So we will solve based on the above hints.
 
Let the seat at extreme right end be 1 and its immediate left is 2 and so on in increasing order till left end.
 
D sits 3rd seat from right end (reference point-1)
 
C sits at 4th seat i.e. immediate left of D (reference point-2)
 
The person A sits at 11 seat i.e. six people sit between A and C (reference point-3)
 
B sits at 15th seat i.e. A sits fourth to the right of B (reference point-4)
 
By using above information we get the following seating as shown below,
 
Person
(North)
        B       A             C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
 
References:
 
Number of person sit between E and D is same as B and E.
 
Only ten persons sit to the left of E.
 
F sits eight to the left of E.
 
Inferences:
 
From above statements,
 
If we observe the seating there are 11 seats in between B and C.
 
As per 1st reference point, E sits in the middle of B and D. Therefore E sits at 9th seat i.e. 5 people sit to the right of E and 5 people sit to the left of E.
 
Given, only ten persons sit to the left of E. Therefore we conclude that there are 19 seats in the linear row.
 
Finally, F sits at 17th seat i.e. F sits 8th to the left of E (reference point-3)
 
All conditions get satisfied and we get the completed seating [19 seats] as shown below,
 
Person
(North)
    F   B       A   E         C D    
Seat Number 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1