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