Among Q R S T and V who is third from the top when they are arranged in ascending order of their height ? I. T is taller than Q and V but shorter than R. II. R and S are taller than T and Q is shorter than T but taller Than V.

Data sufficiency questions are designed to check your ability to analyse & categorise information based on underlying concepts rather than calculations. So you should try to observe -  analyse and to find linkages between various statements rather soing lengthy calculations.