Question 1
Eight persons O, P, N, R, Q, S, T and M are sitting around a circular table. Some face the center and some face outward.
O faces the center. P faces outward and sits third to the right of O.
N sits second to the left of O and faces the same direction as P.
R faces the center and sits immediately to the right of N.
S sits immediately to the right of O. M sits opposite O.
T is not adjacent to P.
Who sits second to the right of R?
Solution Approach:
Step 1: Key rule for mixed facing
- Person facing CENTER: right = CLOCKWISE, left = ANTI-CLOCKWISE
- Person facing OUTWARD: right = ANTI-CLOCKWISE, left = CLOCKWISE
Step 2: Draw 8-seat circle (positions 1β8 clockwise)
Step 3: Start with definite information
- Fix O (faces center) at position 1 (reference point)
- P faces outward, sits third to the RIGHT of O:
O faces center β right = clockwise
3 CW from pos 1 β pos 4
N = pos 4 β
Step 4: Apply relative positions
- N sits second to the LEFT of O (pos 1):
O faces center β left = anti-clockwise
2 anti-CW from pos 1 β pos 7
N faces same as P β OUTWARD
- R faces center, sits immediately to the RIGHT of N (pos 7):
N faces outward β right = anti-clockwise
1 anti-CW from pos 7 β pos 6
Step 5: Fill remaining persons
- S immediately to the RIGHT of O(pos 1, centerβCW): pos 2
- M opposite O(pos 1): pos 5
- T not adjacent to P(pos 4): adj = pos 3 & 5
β T at pos 8, Q at pos 3
Final Arrangement (clockwise):
pos1:O(ctr) | pos2:S(out) | pos3:Q(ctr) | pos4:P(out) | pos5:M(out) | pos6:R(ctr) | pos7:N(out) | pos8:T(ctr)
Find second to the right of R (pos 6, center-facing β CW):
2 CW from pos 6: β pos 8 = T
Verification:
β P(outward) 3 left of O(center): 3 ACW from pos1 = pos4
β N 2nd left of O, same direction as P (outward)
β R(center) immediately right of N(outward, right=ACW)
β S immediately right (CW) of O
β M opposite O
β T not adjacent to P
Answer: T sits second to the right of R.
Step 1: Key rule for mixed facing
- Person facing CENTER: right = CLOCKWISE, left = ANTI-CLOCKWISE
- Person facing OUTWARD: right = ANTI-CLOCKWISE, left = CLOCKWISE
Step 2: Draw 8-seat circle (positions 1β8 clockwise)
Step 3: Start with definite information
- Fix O (faces center) at position 1 (reference point)
- P faces outward, sits third to the RIGHT of O:
O faces center β right = clockwise
3 CW from pos 1 β pos 4
N = pos 4 β
Step 4: Apply relative positions
- N sits second to the LEFT of O (pos 1):
O faces center β left = anti-clockwise
2 anti-CW from pos 1 β pos 7
N faces same as P β OUTWARD
- R faces center, sits immediately to the RIGHT of N (pos 7):
N faces outward β right = anti-clockwise
1 anti-CW from pos 7 β pos 6
Step 5: Fill remaining persons
- S immediately to the RIGHT of O(pos 1, centerβCW): pos 2
- M opposite O(pos 1): pos 5
- T not adjacent to P(pos 4): adj = pos 3 & 5
β T at pos 8, Q at pos 3
Final Arrangement (clockwise):
pos1:O(ctr) | pos2:S(out) | pos3:Q(ctr) | pos4:P(out) | pos5:M(out) | pos6:R(ctr) | pos7:N(out) | pos8:T(ctr)
Find second to the right of R (pos 6, center-facing β CW):
2 CW from pos 6: β pos 8 = T
Verification:
β P(outward) 3 left of O(center): 3 ACW from pos1 = pos4
β N 2nd left of O, same direction as P (outward)
β R(center) immediately right of N(outward, right=ACW)
β S immediately right (CW) of O
β M opposite O
β T not adjacent to P
Answer: T sits second to the right of R.