Sir how many hrs should one study maths per day and is it enough to practice problems in mths . Please sir tell me a very very effective way of learning ,scoring 100 in maths and also the way how one should revise maths wheather tosolve the whole book or what else and how should one study at night before the exam?????....PLZ ANS.

A famous saying "Practice makes a man perfect". So the best way to improve you math is by practicing more and more. First understand a topic throughly and then practice questions on it. Also, try to manage your time. You can make a timetable for yourself and devote appropriate time to all subjects. Allot more time for the subjects in which you feel you are weak.

It's always good to find out what kind of questions are going to be in the exam and the best way is too look through and attempt the previous year papers. 

Practice deep breathing, meditation and yoga as forms of relaxation. They help your body relax and reduce stress. Alternately, take a brisk walk in fresh air.

Make notes of crisp formulae and important concepts and revise them a day before the exam. Take good night sleep. Make sure you get on average 8 hours of sleep a night.