Data Interpretation - Tricks and Techniques

Data interpretation is the most scoring and time consuming section in IBPS and other competitive examinations. In quantitative aptitude section you can see at least 2 data interpretation sets each having 5 questions. In IBPS PO there are 50 questions in Quantitative aptitude section and the cutoff remains 18-19. So if you solve those two sets corrected you need to solve 10 questions out of remaining 40 questions. Here are three important techniques to make Data Interpretation calculations fast

Visual Estimation

It is a well known fact that it is near to impossible to solve 200 questions in 120 minutes accurately. Term "Accurately" is important here because I have seen many candidates attempting 190+ questions and fails to qualify. The reason behind failure is low accuracy and many times accuracy level falls below 40%. Important point to be noted down here is by attempting 190+ with low accuracy you gets less time for questions you are sure about and there is negative marking in most of the competitive exams.

Now lets come to our topic. How to use visual estimation technique to solve Data Interpretation questions. Let's take an visual example :-

data interpretation shortcuts


Example - Red bars states wheat production state and Green bars states rice production.

Question - In which year percentage increase Wheat production was highest ?

As you can see there is increase of 5 tonnes in production both wheat and rice production every year.

10% of 50 = 5

10% of 70 = 7

So answer should 2006.

Finding averages

Many times in Data Interpretation, questions are asked to find average of 5-6 big numbers. As all these numbers are from a same graph, there is high probability that these number will be close to each other. Take a look to following visual example :-

In the above example you can find average of above number in just 5 seconds :-

7800 ( 14 +29 + 108 + 22 + 120/5 ) = 7800 + 58.6 = 7858.6

I always try to find answers by approximation, in my mind I calculated answer 7860. Try it yourself.

Solve the fractions quickly

Learn the value of fractions in percentages. Please read Time and work chapter in my previous post in which I explained via a table.

Faster calculations

Only thing that you require to score well in data interpretation questions is fast calculation. Try to find tricks and shortcuts. You can find multiplication tricks from my previous post.

Let's take an example :- How much 468 of 21428 ?

Let me make this simple for you.

1% of 21428 = 214
2% of 21428 = 428
0.1% of 21428 = 21

For me answer should be around 2.2%

There are tonnes of such techniques which makes calculations easy. No teacher is going to teach techniques in the class. You need to learn them with practice.

Go to TestPanda.com for free practice tests on Data Interpretation

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66 comments:

  1. Answer one simple question, In which year growth rate in bars is highest ?

    ReplyDelete
  2. You asked 4 questions in a row!!
    I was just explaining the method, its all your wish if you take it as 20% instead of 10%.

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    Replies
    1. i think the answer to wheat- rice % increase question should be 2005 not 2006

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    2. no sorry its 2006

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    3. 2006 is correct answer.

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  3. I couldn't understand the visual estimation problem explained in this section

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    Replies
    1. data interpretation tricks PLS PDF FILE

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    2. visiual estimation needs practice ...

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    3. you need to calculate in your mind first

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  4. Thanks Bhuvan
    Best of luck for your exam. Please share this blog on Facebook :)

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  5. I will try to improve on data interpretation sets,,,besides all these queries I feel that you are sharing ur experience and knowledge in a very detailed and practical manner...by reading ur notes and strategies I've gained much confidence,,,,
    Thanx a lot

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  6. It is just an example

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    Replies
    1. SIR PLZ CAN U HELP ME ON SOME MORE QUES OF DI...

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  7. @nitish I am making a detailed video lesson for Data Interpretation

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  8. SIR..,
    I NEED THE SEPEARTE SYLLABUS FOR THE SBI CLERICAL EXAM

    ReplyDelete
    Replies
    1. Syllabus for SBI clerical exam is same as above

      Delete
  9. Sir will u please explain how to interpret the data in 3D bar and pie charts as it was asked in PO exam 2013

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    Replies
    1. Yes sure, pie charts questions were really easy

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  10. can you explain the last faster calcilation technique?

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    Replies
    1. Try to solve questions by estimation

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    2. Hi i have a query ..can anybody pls anwser

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  11. Again I did not understand how the 1st prob is solved. Please explain Sir.

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    Replies
    1. It's not a question. It's just a trick, that 10% of 100 bigger than 10% of 50

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    2. Ok, but then why is it written that the ans should be 2006?

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  12. Because rate of increase is higher in 2006

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    Replies
    1. Sir, For each annual year, it seems same difference in Wheat production na sir? Then how it is only 2006 yr.?? And as the question is about only wheat production, why 70 numerical has taken?
      Could u plzz clarify?

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    2. Increase happened in 2006 not 2005.. And I too don't know y 70 has been considered..?

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  13. ok..I will remember the trick :) Thank you.

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  14. hi,can you please tell me what is the format for descriptive section for ibps clerk exam that is online??

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  15. SSA Sir,
    Albeit I read the comments mentioned above[for the first question], still unable to understand why you used 10% of 50 and 70 respecively. In the graph, wheat production has never been 50. Could you please repeat what prompted you to take this step. I'll be extremely grateful to you.

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  16. Also, Ideally in the same first question if you take 10% of 70 (maximum value of wheat production) among all the years, then answer should be 2008. Still Unable to figure out, what's the trick there.

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    Replies
    1. 10% of 50 = 5 it happened in 2006, and now 10% of 55 is 5.5 but it is jus 55+5= 60 not 60.5~ 5.5(<10) so it is try only at 55....

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  17. sir i cant understand above problem... i have frusteted.. please share another problem and another explanation...Thank you...

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  18. Sir, even i am not able to understand how you solved the wheat and rice problem.
    You have taken 10% of 50 for wheat for 2005 and 10% of 70 for rice for 2008 and you gave the answer as 2006, how is it related, please explain elaborately and in detail.

    Thanks in advance.

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  19. sir,
    what about profit and loss problem in DI.
    Please clerify

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  20. Sir I m not getting visual estimation problem !!!!
    10% of 50 and 10% of 70...why you took these two number and there 10 % ???

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  21. sir i am a beginner ,i find this tricks and your sharing experience very useful and motivates me to work further .thanks a lot.since i am a beginner can you suggest me few guidelines in preparing for bank exams ?
    and this section, i did not understand the visual representation problem .how wheat got 70?

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  22. Sir your website is awesome.... i have been going to class which teach these techniques but the way u explain here is totally awesome than anyone else....i was randomly searching for a good website and for ur website very useful.Thank u so much for sharing these techniques for students like me.
    Thank you once again. :)

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  23. Sir plz can you tell me how many questions we should solve in each section for clear these exams.

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  24. sorry but didn't get your technique for the question no 1 will you please explain.....

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  25. sorry sir., even i couldnt able to understand the logic of 1st problem.
    it would be grateful if u could take any other example to explain this.

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  26. sorry sir i couldnt understand the logic of 1st problem, it would be grateful if u could explain this taking any other example.

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  27. To all those who got confused in the bar-graph example;
    Ramandeep sir wanted you to think on the following line: % increase in 2006 is 10%......after that even if we take the highest no., i.e. 70, its 10% needs to be 7....but change in production is always 5....meaning that production is less than 10% always.....thus 10% increase is highest and that is in 2006.

    However, this isn't the correct approach and it's too clumsy.
    Easy one is:
    there is an increment of 5 every time. Thus, out of 5/50, 5/55, 5/60, 5/65.....(and so on even if there were more years) obviously due to constant numerator, the fraction with smallest denominator will be largest.
    This one thing, if strikes at once to you, shall make the answer simple.
    Hope you get it now! :)

    ReplyDelete
    Replies
    1. As per ur explanation, largest is 5/50 which is 2005 production. then why the ans is 2006???

      Delete
    2. In which year growth % is maximum?
      2005 is definitely not the answer , to find out growth % in 2005 you must know the weat production in 2004 which is not given
      And now you can see the difference between last year and present year production is 5 in all the cases
      Game of fraction
      For maximum % growth you must multiply 5 with a fraction which is greater than 1 ,ie 100/55...I hope it's fine now

      Delete
  28. For bar-graph question, the logic given is wrong.............think this way:
    every year increment is of 5....thus: 5/50, 5/55, 5/60........out of these, one with smallest denominator is the largest fraction as numerator is constant for all. Simple!

    ReplyDelete
    Replies
    1. what does this mean?? answer should be 2005, 2006 or 2007.
      As per your trick answer should be 2005. and by any chance, answer 2006 does not seems to be correct. Please explain elaboratly.

      Thanks :)

      Delete
  29. Sir i cant understand the data interpretations problems please send me pfd file

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  30. sir pls upload last five years question paper for ibps clerk exam question ... pls soon sir...(ibps clerk previous year question ) ... s.rohitrathi@gmail.com ...

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    Replies
    1. Already available, check previous posts

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  31. Sir... pls upload shortcut methods for remembering reasoning.

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  32. I am still not clear about the wheat percentage , can u explain briefly....?

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  33. change happened in 2006 not in 2005,for all those people who have this doubt....

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  34. 5/50*100=10% increase in 2006
    5/55*100=9.9 increase in 2007
    ......
    ......
    so maxium increase happend in year 2006 and after that decrease in all year respectively

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  35. I am not understand your teaching way.....

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  36. How to find square root of 6084 is there any shortcut method to find squre root or cube root

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    Replies
    1. I think it depends on the option.....but without options, I check its divisibly till one digit n those who are squares of some number (such as 4 and 9)...I found it to be divisible by 9 and when you divide it by 9...the number become 676...which is the square root of 26...I learnt square root till 30....it took barely a minute or less

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  37. may be the way is not right but the ans is right...

    lets understand this ques in easy way..
    change of 5 tonnes in each year..
    so when we calculate for 2006 its increment of 10% in compare to 2005
    i.e. 10% of 50 and add it to the 50 which will be 55

    the same thing when you applied for the rest year you will get that up coming year have the increment of less than 10%

    ReplyDelete
  38. Nice really helpfull.. Thanks for sharing tricks..

    ReplyDelete

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