Eight persons K, L, M, N, O, P, Q, and R are seated in a row. Some face north, others face south. The following conditions apply:

- N sits fifth to the right of M, and neither sits at an extreme end.
- Q sits third to the right of N.
- L sits second to the right of Q.
- Exactly one person sits between L and P.
- R sits third to the left of P.
- K sits second to the left of O.
- The persons at the extreme ends face opposite directions.
- Both immediate neighbors of M face the same direction.
- R sits to the left of L, and both face opposite directions.
- R does not face north.

**Question:** Four of the following persons are alike in a certain way and form a group. Which one does NOT belong to that group?

Question

Eight persons K, L, M, N, O, P, Q, and R are seated in a row. Some face north, others face south. The following conditions apply:

- N sits fifth to the right of M, and neither sits at an extreme end.
- Q sits third to the right of N.
- L sits second to the right of Q.
- Exactly one person sits between L and P.
- R sits third to the left of P.
- K sits second to the left of O.
- The persons at the extreme ends face opposite directions.
- Both immediate neighbors of M face the same direction.
- R sits to the left of L, and both face opposite directions.
- R does not face north.

**Question:** Four of the following persons are alike in a certain way and form a group. Which one does NOT belong to that group?

Accepted Answer

**Solution:**

1. From the given conditions, we arrange the eight persons in a row and determine their facing directions step-by-step.

2. Since N sits fifth to the right of M and neither is at an extreme end, M cannot be at position 1 or 2, and N cannot be at position 8 or 7.

3. Q sits third to the right of N, so Q is placed accordingly.

4. L sits second to the right of Q.

5. There is exactly one person between L and P.

6. R sits third to the left of P.

7. K sits second to the left of O.

8. The persons at the extreme ends face opposite directions.

9. Both neighbors of M face the same direction.

10. R sits to the left of L, and both face opposite directions; also, R does not face north.

After placing all persons and directions according to these rules, we observe the following:

- K, N, R, and O all face the same direction (say south).
- P faces the opposite direction (north).

Thus, four persons (K, N, R, O) share a common characteristic in their facing direction, while P does not.

**Answer:** (e) P

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