Six people have different heights. U is the tallest one. P is taller than R, who is shorter than S. Q is shorter than R, but taller than T. Who is shortest one?

T

So:

1) U is the tallest one.

2) P is taller than R. who is shorter than S.

3) Q is shorter than R, but taller than T.

So, U > P/S > S/P > R> Q> T

Therefore, T is the shortest