Siddharth it will be a little difficult as very less time is left for the exam but it is not impossible. You will need to manage time very precisely. 

This is not a theoretical subject or any school exam, it's all a test of your simple maths and English. If you have a good command of English then you won't face problem in Verbal Ability section. Now for quantitative ability section start reading all the basic chapters (I have mentioned the syllabus in your other question).

First Week program

Step 1: Write down all the formulae and patterns to solve questions of different topics

Step 2: Memorise all the formulas

Step 3: Start solving a few basic questions of each chapter from this website - http://www.indiabix.com/

Remaining 3 weeks

Start giving lots of online mock test and analyse solutions of each one of the thoroughly which will help you in overcoming your mistakes and come up with a strategy to definitely improve your marks and percentile. It will also help you to know about your strength and weakness which will help you in attempting easy questions first, that will reduce your chance of committing a silly mistake in an easy question or missing out an easy question. Along with this, you will also get enough time to attempt medium level difficult questions which will overall increase your speed with accuracy which leads to increase your overall score.

Step 1: Try to give 1 mock test every day

Step 2: Then analyse the solution if each question deeply

Step 3: Note down the mistakes you have done, concepts you have missed, if possible, a better way of solving a question which might be correct for you

Step 4: Again revise the basics of all the chapters

Step 5: Go through the mistakes you have committed

Step 6: Agin going through all steps next day

There are many online sites for giving these type of tests, it's not necessary to be IPMAT mock test paper. By solving questions on the same topic will make you good enough for the exam in a month.

If you really want to succeed you need to put your 110% focus and determination in the preparations and get rid of all the distractions.

All the best!!

Hello Siddharth! I am afraid you will not be able to do that if you start preparing now as the last one month is for revision and brushing up your skills. All the best!