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