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Strategy for DI


In DI, read the data and questions very carefully. You can't solve questions correctly if you haven't understood the questions. Concentrate and make it a point that you understand the question in one single reading. Similarly, you should spend some time on the data and understand it.


1.     First spend 15 to 30 seconds in having a look at and analyzing the graph. Spending this time once would necessarily reduce the 12-18 seconds you will otherwise spend in solving every question in the block.


2.     Read all the information carefully, specifically the minor details (which you consider minor) given,  like

        a) data in ’000

        b) in tons of     

        c) lakh bales of 150 kg each

        d) profit = revenue – cost        

        e) last nine months/for the first quarter


3.     If any * or like symbol is given, carefully read the information next to the symbol in the footnote and relate it with the graph. 


4.     Read every question without missing even a single word from the statement. Be cautious where the information given in the graph denotes in ‘000 or in lakhs. In such cases either the questions should also include ‘000 or lakhs respectively or the options should have ‘000 or lakhs in them respectively. A very common error is to solve the question correctly but mark the choice with the wrong units. For example, if your answer is 234(000) a common mistake is to mark the choice as 234 units, whereas the anser should be 2.34 lakh units.


5.     After reading the question relate the question to the graph and then see what is required to be calculated.


6.     Keep the choices in focus. How far away they are from each other and what kind of guesses can take you closer to the answer.


7.     After seeing the choices you can calculate the approximate answer, e.g. in order to multiply 122 and 179 you can multiply 12 with 18 along with 2 zeroes in the end, this would give you an approximation. In 95% of the cases there would be only one option close to the approximation and that would be the right answer.


8.     Remember that a question on “increase” and the “percentage increase” are toe different things. The former represents the absolute increase that can be calculated as final minus initial figure. The percentage increase represents the relative increase that is calculated as: (Final – initial figure)/(initial figure) × 100.


 9.    See what is required: is it “X is what percent of Y” or “X is how much percent more than Y.” In the former case (X ÷ Y)× 100 will give you the answer and in the latter case [(X – Y) ÷ Y] × 100 will give you the answer.



It is evident from above that the student must be able to locate data and calculate quickly. We should know the following techniques:


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