Hi Ramchandra, I hope you have very less time since you are taking the exam during the end of the month. If you have solved the two exams provided with K&b then just look at the areas in which you are weak and prepare on those very well and read the two minute drills in K&B. All the best and you will surely do well in the exam
percentage will be definetly improved if you concentate on the subject rather than the help here. study those books again, try to figure out your weak areas, do practice the questions. I think K&B and mughal book are more than enough. Normally, 4-5 times of reading is needed if you are aiming at more than 90%.