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Five people M, N, O, P, and Q are sitting in a row. M is to the right of P. Q is to the left of N. P is to the left of O. N is to the right of M. Who is sitting in the middle?
M
N
O
P
M
Write down the constraints one by one and create a relative chain: Q-N, M is right of P, N is right of M, and P is right of O (P is left of O), leading to O-P-M-Q-N.
Write down the constraints one by one and create a relative chain: Q-N, M is right of P, N is right of M, and P is right of O (P is left of O), leading to O-P-M-Q-N.
Establish positional constraints
Chain the positions
Combining the constraints: P is left of M (P-M), N is right of M (M-N), Q is left of N (Q-N), and P is left of O. Looking at the sequence P-M-N and Q being to the left of N, we get the arrangement O-P-M-Q-N.
Identify the middle position
In the sequence O, P, M, Q, N, the person in the 1st position is O, 2nd is P, 3rd is M, 4th is Q, and 5th is N. The middle (3rd) position is occupied by M.
B: N is at the 5th position, C: O is at the 1st position, D: P is at the 2nd position.
A is correct because when the constraints are combined into a linear row, the sequence becomes O, P, M, Q, N, placing M exactly in the center.
When dealing with seating arrangements, always look for an anchor person mentioned in multiple clues to start your chain sequence.