Seven people, N, O, P, Q, R, S and T, are sitting in a straight line facing north. T is sitting at one of the ends of the line. Only two people are sitting to the left of R. P is sitting to the immediate right of R and immediate left of S. Q is sitting to the immediate left of O. Q does not sit at an extreme end of the line.

How many people are sitting between O and N?

Two

Zero

Four

One

APEDIA

NTPC Graduate Tier 1

2025 • 06 May, 2025 • Shift-1

Seven people, N, O, P, Q, R, S and T, are sitting in a straight line facing north. T is sitting at one of the ends of the line. Only two people are sitting to the left of R. P is sitting to the immediate right of R and immediate left of S. Q is sitting to the immediate left of O. Q does not sit at an extreme end of the line.

How many people are sitting between O and N?

Correct Answer

Four

Structural Placement: In a linear setup of exactly seven seats, the condition 'only two people are to the left of R' unequivocally anchors R at the 3rd position......

💡 Analysis & Explanation

Structural Placement ▼

In a linear setup of exactly seven seats, the condition 'only two people are to the left of R' unequivocally anchors R at the 3rd position from the left.

Neighbor Alignment ▼

The puzzle dictates P sits immediately right of R (claiming the 4th spot) and immediately left of S (claiming the 5th spot), thereby forming the solid block 'R-P-S'.

End Placements ▼

Q must sit immediately left of O. If they were to occupy the first two available seats, Q would be forced into an extreme end, violating a core rule. Consequently, Q and O must occupy the 6th and 7th seats respectively.

Final Order ▼

With the right side full, T is forced to take the only remaining extreme end (the 1st seat), thereby leaving N to occupy the sole vacant 2nd seat. The completed arrangement from left to right is: T-N-R-P-S-Q-O.

Conclusion ▼

Visually counting the individuals situated strictly between O (7th seat) and N (2nd seat) reveals exactly four people (R, P, S, Q).

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