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Question

A, B, C, D, E and F are sitting around a circular table, facing the centre. B sits third to the right of C. C sits second to the left of A. F sits third to the right of D. D sits to the immediate left of E. How many people sit between E and B, when counted from the left of E?

The correct answer is
One

Circular Table Seating Arrangement Solution

This problem involves determining the seating positions of six people (A, B, C, D, E, F) around a circular table based on relative positions and then finding the number of people between two specific individuals (E and B).

Applying Seating Constraints

We assume 6 seats around the table, numbered 1 to 6 clockwise. Facing the center, "right" means clockwise and "left" means counter-clockwise.

  • Constraint 1: B sits third to the right of C. (If C is at seat 1, B is at seat 4).
  • Constraint 2: C sits second to the left of A. (This means A is second to the right of C. If C is at seat 1, A is at seat 3).
  • Constraint 3: F sits third to the right of D.
  • Constraint 4: D sits to the immediate left of E. (They are adjacent, DE counter-clockwise or ED clockwise).

Deducing the Arrangement

  1. Place C at seat 1.
  2. From Constraint 1, B is 3 seats to the right of C. Seats: C (1), Seat 2, Seat 3, B (4).
  3. From Constraint 2, A is 2 seats to the right of C. Seats: C (1), Seat 2, A (3), B (4).
  4. The remaining seats are 2, 5, and 6. The people left are D, E, and F.
  5. Constraint 4 states D is immediately left of E. They must occupy adjacent seats. The only available adjacent pairs are (5, 6). So, D must be at seat 5 and E at seat 6.
  6. This leaves seat 2 for F.
  7. Final Arrangement (Clockwise): C (1), F (2), A (3), B (4), D (5), E (6).
  8. Verify Constraint 3: F sits third to the right of D. D is at seat 5. Counting right: Seat 6 (E), Seat 1 (C), Seat 2 (F). This matches.

Calculating People Between E and B

The question asks for the number of people between E and B, counted from E's left.

  • E is at seat 6.
  • B is at seat 4.
  • Counting from E's left (counter-clockwise):
  • The first person to E's left is D (at seat 5).
  • The next person is B (at seat 4).
  • The sequence is E -> D -> B.
  • The only person sitting between E and B in this direction is D.

Therefore, there is one person between E and B when counted from E's left.

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Important Questions from Circular Arrangement

  1. A, B, C, D, E and F are sitting around a circular table facing the centre. D sits third to the right of C. A sits second to the left of C. E sits second to the right of F. B sits to the immediate right of E. How many people sit between A and F when counted from the left of A?
  2. A, B, C, D, E and F are sitting around a circular table, facing the centre. A and D are immediate neighbours of C. E is to the immediate left of D. A and F are not immediate neighbours. Who sits third to the right of A?

  3. Six colleagues - Hussain, Anita, Manshaad, Emily, Sunita, and Shanti - are sitting around a circular table facing the centre. Hussain is sitting second to the right of Anita. Manshaad is an immediate neighbour of both Emily and Anita. Sunita is sitting second to the left of Manshaad. Who is sitting second to the left of Shanti?
  4. A, B, C, D, E and F are sitting around a circular table, facing the centre. D sits third to the right of C. A sits second to the left of C. E sits second to the right of F. B sits to the immediate right of E. How many people sit between A and F, when counted from the left of A?

  5. A, B, C, D, E, F and G are sitting around a circular table, facing the centre. Only two people sit between F and C, when counted from the right of F. Only two people sit between C and A, when counted from the right of C. Only three people sit between F and G, when counted from the right of F. E sits to the immediate left of D. How many people sit between D and F, when counted from the right of D?
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