Eight persons – P, Q, R, S, T, U, V and W sit around a circular table facing the center but not necessarily in the same order. S sits second to the right of U. Q sits adjacent to U. Only one person sits between S and W. T does not sit adjacent to W. T sits to the immediate left of P. R sits two persons away from P.
W sits adjacent to ___.
Correct Answer :
Both R and V
Solution :
The correct option is Both R and V.
Let us solve this seating arrangement step-by-step for the eight persons (P, Q, R, S, T, U, V, and W) sitting around a circular table facing the center.
Step 1: Determine the positions of U, S, and W.
Place U at position 1 (facing center). Since all persons face the center, clockwise is to the left and counter-clockwise is to the right.
S sits second to the right of U. Moving two places to the right (counter-clockwise) from position 1, S is placed at position 3.
Only one person sits between S and W. This gives two possibilities for W:
Case 1: W is at position 1 (occupied by U) – Not possible.
Case 2: W is at position 5.
Thus, W is at position 5.
Step 2: Place T and P.
T sits to the immediate left of P, and T does not sit adjacent to W. Since W is at position 5, T cannot be at position 4 or position 6.
The available positions around the circle are positions 1 to 8, with U at 1, S at 3, and W at 5.
T and P must occupy two consecutive positions such that P is to the right of T (meaning T is immediately to the left of P, so in counter-clockwise order, T comes before P).
Testing consecutive vacant positions for (T, P):
- Positions (6, 7): T at 6 is adjacent to W at 5, which violates the rule that T is not adjacent to W.
- Positions (7, 8): T at 7, P at 8. T is not adjacent to W, which is valid.
Step 3: Place R, Q, and V.
R sits two persons away from P. From position 8 (P), moving 2 places clockwise gives position 6, or 2 places counter-clockwise gives position 2.
If R is at position 6:
Q sits adjacent to U (position 1). The positions adjacent to U are 2 and 8 (P is at 8). So Q must be at position 2.
Now, the remaining empty position is 4, which must be occupied by V.
Step 4: Verify the full arrangement.
Let us list the circular order from position 1 to 8:
1: U
2: Q
3: S
4: V
5: W
6: R
7: T
8: P
Let us check all given constraints:
- S (3) sits second to the right of U (1): Correct.
- Q (2) sits adjacent to U (1): Correct.
- Only one person (V at 4) sits between S (3) and W (5): Correct.
- T (7) does not sit adjacent to W (5): Correct (neighbors of T are R at 6 and P at 8).
- T (7) sits to the immediate left of P (8): Correct.
- R (6) sits two persons away from P (8): Correct.
Conclusion:
Looking at position 5 where W is seated, the persons sitting adjacent to W are V (position 4) and R (position 6).
Therefore, W sits adjacent to Both R and V.
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