Five friends K, L, M, N and O are sitting around a circular table facing centre. N is to the immediate right of K. L is to the immediate left of M. N is at the second place to the right of M. Where is O sitting ?
Between N and L
Solving the Circular Table Seating Arrangement Puzzle
This question involves a circular seating arrangement puzzle. We have five friends, K, L, M, N, and O, sitting around a circular table, and they are all facing the center. We need to determine the position of O based on the given clues.
Let's break down the clues provided:
- Clue 1: N is to the immediate right of K.
- Clue 2: L is to the immediate left of M.
- Clue 3: N is at the second place to the right of M.
In a circular arrangement where everyone is facing the center:
- "Immediate right" means the person sitting clockwise to the current person.
- "Immediate left" means the person sitting counter-clockwise to the current person.
- "Second to the right" means two positions clockwise from the current person.
Step-by-Step Deduction Process
Let's use the clues to build the seating arrangement. It's often helpful to start with the most constrained clue, which is often one involving positions relative to multiple people or positions further away.
We will start with Clue 3:
- Clue 3: N is at the second place to the right of M.
- Let's place M anywhere. Moving clockwise (to the right), the person in the first position is M's immediate right, and the person in the second position is N.
Current arrangement (clockwise): M > (1st right) > (2nd right) > N
Now, let's use Clue 1:
- Clue 1: N is to the immediate right of K.
- This means K must be sitting immediately to the left (counter-clockwise) of N.
Adding K based on Clue 1:
Current arrangement (clockwise): M > K > N
Let's use Clue 2:
- Clue 2: L is to the immediate left of M.
- This means M is sitting immediately to the right (clockwise) of L.
Adding L based on Clue 2:
Current arrangement (clockwise): L > M > K > N
We have placed four friends: L, M, K, and N, in a sequence. Since it's a circular table with five friends, there is only one spot left, and only one friend remaining, which is O.
The sequence so far is L > M > K > N (clockwise). The fifth person, O, must fit into the remaining spot to complete the circle.
If we arrange L, M, K, N clockwise, there's one spot before L to complete the circle, or one spot after N. Let's revisit the deductions:
- M > K > N (from Clues 3 and 1 combined).
- L > M (from Clue 2).
Combining these: L > M > K > N. Since it's a circle with 5 spots, the arrangement must be L, M, K, N, and the last person O fitting in the gap to complete the circle. The gap is between N and L.
The complete clockwise arrangement is: L > M > K > N > O > L.
Verifying the Final Arrangement
Let's check this arrangement against the original clues:
- Is N to the immediate right of K? Yes, K > N clockwise. (K is followed immediately by N).
- Is L to the immediate left of M? Yes, M < L counter-clockwise. (L is immediately before M counter-clockwise).
- Is N at the second place to the right of M? From M, 1st right is K, 2nd right is N. Yes, M > K > N clockwise.
All clues are satisfied by the clockwise arrangement: L, M, K, N, O. This also means the arrangement counter-clockwise is: L, O, N, K, M.
Let's visualize the arrangement:
| Position | Person (Clockwise) |
|---|---|
| 1 | L |
| 2 | M |
| 3 | K |
| 4 | N |
| 5 | O |
From this arrangement, O is at position 5, N is at position 4, and L is at position 1. O is between N and L in the circular arrangement (either going from N clockwise to O and then L, or from L counter-clockwise to O and then N).
Analyzing the Options
Now, let's look at the given options based on our confirmed arrangement (L > M > K > N > O clockwise):
- Option 1: To the immediate right of M
Immediate right of M is K. This is incorrect. - Option 2: Between N and L
Looking at the arrangement L, M, K, N, O, L in clockwise order, O is indeed located between N and L. This is correct. - Option 3: Between N and M
Looking at the arrangement, K is between N and M. This is incorrect. - Option 4: Third to the right of L
Starting from L and moving to the right (clockwise): 1st right is M, 2nd right is K, 3rd right is N. The third right of L is N. This is incorrect.
Based on our analysis, O is sitting between N and L.
Revision Table: Final Arrangement Summary
| Person | Immediate Right | Immediate Left |
|---|---|---|
| L | M | O |
| M | K | L |
| K | N | M |
| N | O | K |
| O | L | N |
Additional Information on Circular Seating Arrangements
Circular seating arrangement problems are common in logic and reasoning tests. Here are some key points to remember:
- Always pay attention to whether people are facing the center or away from the center, as this determines the direction of 'right' and 'left'. In this problem, they face the center.
- 'Immediate right' is the person next in the clockwise direction.
- 'Immediate left' is the person next in the counter-clockwise direction.
- Distances (like 'second to the right') are counted by the number of people between, plus one for the destination person. For example, 'second to the right' means one person between the starting person and the destination person, in the clockwise direction.
- Drawing a diagram (a circle with slots) can be very helpful to visualize the positions as you place people based on the clues.
- Start with the most specific clues, often those linking three or more people or defining distances greater than 'immediate'.
- Once an arrangement is formed, always double-check it against all the original clues to ensure accuracy.
- Remember that in a circle, the first and last positions are adjacent.
Practicing different types of seating arrangements will improve your ability to solve these puzzles efficiently.
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