No doubt DI/LR section is considered to be the toughest section but with patient practicing you can achieve the targets. Approximately try to score around 60 marks in this section to aim a percentile above 99. You need to work hard on your speed and calculations and so practice well to enhance your calculation speed and accuracy. Minimize the use of calculators and focus on mental calculations. Also read carefully to what the question is as it might create a confusion for you. Avoid making assumptions and don't do the guess work.

Good Luck.