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Zorluk: OrtaSeating Arrangement

Eight delegates—J, K, L, M, N, O, P, and Q—are seated in two parallel rows containing four people each, such that there is an equal distance between adjacent persons.

In Row-1, J, K, L, and M are seated and all of them are facing South.
In Row-2, N, O, P, and Q are seated and all of them are facing North.
Each member seated in a row faces another member of the other row.

• N sits second to the right of O.
• The person facing N sits to the immediate right of M.
• The person facing L sits to the immediate left of N.
• J is an immediate neighbor of L but does not face O.
• Q does not sit at an extreme end of the row.

Based on the given seating arrangement, which of the following statements are correct? (Select all that apply)

  1. A
    K sits at the extreme left end of Row-1.
  2. L faces Q, who sits second to the left of P.Cevap
  3. J sits to the immediate left of L.Cevap
  4. D
    O sits at the extreme right end of Row-2.

Cevap

The statements 'L faces Q, who sits second to the left of P' and 'J sits to the immediate left of L' are correct.
The correct statements accurately reflect the finalized arrangement. L is at Position 2 (Row-1) facing Q at Position 2 (Row-2). Since P is at Position 4 (Row-2, facing North), Q is exactly second to the left of P. Furthermore, J (Position 3) is to the immediate left of L (Position 2) because they face South, meaning their leftward direction is eastward.

Adım Adım Çözüm

1
Determine the valid positions for O and N in Row-2.
O must be at Position 1 and N at Position 3.
N sits second to the right of O (North-facing). If O were at Position 2, N would be at Position 4. In that case, the person facing N (Position 4 in Row-1) would sit to the immediate right of M. Since Row-1 faces South, right means a lower position number on the grid, requiring M to be at Position 5, which is impossible. Thus, O is at Position 1 and N is at Position 3.
2
Determine the position of M in Row-1.
M must sit at Position 4.
N is at Position 3. The person facing N is at Position 3 in Row-1. This person sits to the immediate right of M. Because Row-1 faces South, M must be at Position 4 (to the east of Position 3).
3
Locate the positions of L and Q.
L sits at Position 2 in Row-1, and Q sits at Position 2 in Row-2.
The person facing L sits to the immediate left of N. N is at Position 3 (North-facing), so N's immediate left is Position 2. Thus, the person facing L is at Position 2 in Row-2. This means L is at Position 2 in Row-1. Since Q cannot sit at an extreme end and Position 2 is the only inner seat available in Row-2, Q must sit at Position 2, facing L.
4
Determine the positions of J and K in Row-1.
J sits at Position 3 and K sits at Position 1.
J is an immediate neighbor of L (who is at Position 2), so J is at 1 or 3. If J were at 1, J would face O, contradicting the rule that J does not face O. So J is at 3, leaving Position 1 for K.
5
Determine the final position for P in Row-2.
P sits at Position 4.
The only remaining seat in Row-2 is Position 4, so P must be seated there.

Anahtar Kavram

Double parallel row seating arrangements with opposite facing directions.
Tahmini Süre:2m 30s
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Konular

Seating Arrangement

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