RC is a section which cannot be improved very quickly. However this is not impossible either. A good way to improve reading comprehension is to spend time on regular reading. Editorials on leading newspapers is a good place to start. If your reading speed is not very good then also focus on speed can help. A very good book is Read Better and Faster by Norman Lewis. Maths - Work on the basics first. Understand basic topics like work & time etc.. Once you are comfortable with basics try doing it faster.
