Medium
Five persons P, Q, R, S and T sit in a row facing north. R sits in the middle. P sits at the extreme left end. S sits immediately to the right of R. Q sits next to P. Who sits at the extreme right end?
Explanation
Explanation
Step 1: Draw five positions 1 to 5 from left to right.
Step 2: R is in the middle, so R = position 3. P is at the extreme left, so P = position 1.
Step 3: S is immediately right of R, so S = position 4.
Step 4: Q sits next to P; the only free seat next to position 1 is position 2, so Q = position 2.
Step 5: The only remaining person is T and the only remaining seat is position 5.
Step 6: Final row: P, Q, R, S, T. The extreme right is T.
Answer: T.
PRO TIP
Re-check your working by substituting the answer back into the original question.