P, Q, R, S, T, U are 6 persons sitting in a straight line facing north but not in the same order. There are two persons sitting between the P and T. S is to the immediate right of P. R is at the extreme right. Q is second to the left of P .U is sitting between Q & P. Who is sitting at the left end?

Q is second to the left of P. S is to the immediate right of P.

Q _ P S

There are two persons sitting between the P and T.

T is possible in two places which are given below in Case(i) and Case(ii).

Case(i) T Q _ P S

Case(ii) Q _ P S _ T

R is at the extreme right.

In Case(ii), R is not possible as per the above-given condition. So this case is eliminated.

T Q _ P S R

U is sitting between Q & P.

T Q U P S R

According to the above arrangement, T is sitting at the left end.