Question 1
Six persons D, A, B, F, C and E are sitting around a circular table facing the center.
D sits second to the left of A. B sits opposite to D.
F sits immediately to the right of B. E is not adjacent to F.
Who sits opposite to A?
Solution Approach:
Step 1: Draw circular diagram
6 persons facing center. Opposite positions are 3 seats apart.
Number positions 1β6 clockwise.
Step 2: Place definite positions
- Fix D at position 1 (reference point)
- D is second to the LEFT of A β A is 2 clockwise from D
pos[A] = 3
- B sits OPPOSITE D (pos 1) β pos 4
- F sits immediately to the right of B (pos 4) β pos 5
Step 3: Resolve remaining positions
Remaining persons: E, C β remaining seats: [2, 6]
E is NOT adjacent to F (pos 5).
Adjacent to pos 5: pos 4 and pos 6.
Therefore E β pos 2, and C β pos 6.
Final Arrangement (clockwise):
pos1:D β pos2:E β pos3:A β pos4:B β pos5:F β pos6:C
(All facing center)
Opposite pairs: pos1βpos4, pos2βpos5, pos3βpos6
A is at pos 3 β opposite = pos 6 = C
Answer: C sits opposite to A.
Step 1: Draw circular diagram
6 persons facing center. Opposite positions are 3 seats apart.
Number positions 1β6 clockwise.
Step 2: Place definite positions
- Fix D at position 1 (reference point)
- D is second to the LEFT of A β A is 2 clockwise from D
pos[A] = 3
- B sits OPPOSITE D (pos 1) β pos 4
- F sits immediately to the right of B (pos 4) β pos 5
Step 3: Resolve remaining positions
Remaining persons: E, C β remaining seats: [2, 6]
E is NOT adjacent to F (pos 5).
Adjacent to pos 5: pos 4 and pos 6.
Therefore E β pos 2, and C β pos 6.
Final Arrangement (clockwise):
pos1:D β pos2:E β pos3:A β pos4:B β pos5:F β pos6:C
(All facing center)
Opposite pairs: pos1βpos4, pos2βpos5, pos3βpos6
A is at pos 3 β opposite = pos 6 = C
Answer: C sits opposite to A.