Preparation for SBI exam

No, I'm not preparing for the exam, but am helping someone.
Time period - 3 weeks until the exam
To be covered - A 400+ page book with multiple choice questions in topics including Indian politics, Science, Mathematics, Verbal English, Geography, Computers.
Agreement - Due to the time constraint and the vastness of the topics, we (Mohan and I) have agreed to skip all topics that involve anything diagrammatic or require visuals (You will know why soon).

Mohan, currently works in Medical Transcription in one of the local hospitals. Being visually impaired does not deter him from dreaming big. He would like to take the bank exam and hopefully do well. A clerical post at the bank would get him a permanent posting ensuring job security and income flow.

We covered 100 questions in Indian Constitution and 60 questions in Science today.
Of the former 100, I barely knew the answer for about 15 (such a shame) while Mohan got almost 75% right - good for him :D this is why we breezed through this section.
When we switched to Science, I realized how difficult it was for him to grasp the difference between mesosphere/stratosphere/ionosphere or even between electron/proton/neutron - not the concepts but who discovered them. At least here, I guess I was more familiar with the terms. So we spent some time going over the questions, then revised the answers for previously discussed questions and finally chose questions at random from everything that we had gone over. This is the reason for the lesser number of questions covered.

Another thing I realized was, in order to answer, one must first understand the question. I had to explain what words like impeach, encompass and envisage.
In the science section I tried to help him relate answers to questions by explaining concepts of vitamins/sources, tides/gravitation and scientist names with their inventions.

I learnt today that the president gets a salary of Rs.1.5 lakhs per month and the governors of the state Rs. 1.1 lakhs per month per the recent pay revisions (legal salary on paper - I mean)
I also learnt that Streptomycin was discovered by Walkman (the only walkman I knew until now was the Sony kind)
We had discussions on declaration of President's rule in certain states and the dissolution of assemblies, trying to find a rationale/reasoning for it all. In cases where we couldn't, we just took the book answer to be the truth as is. (so much for civics)

We've just scraped through the surface of these 2 topics.... there's long way to go!