DI Tables – What to expect? How to approach? - Samrat Roy
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Samrat Roy, Regional Manager, ENDEAVOR Careers Pvt. Ltd., is based out of Kolkata. He has trained over 15000 students for various competitive examinations like CAT, GMAT, GRE in the last 13 years. His area of interest is Quantitative Aptitude(QA), Data Interpretation(DI) and Logical Reasoning(LR).Easy Questions vs Difficult questions:
The Table below gives the details of the top 10 run scores in the IPL 2015. (The data is taken from espncricinfo.com). The batting average is calculated as (Runs scored/No. of times dismissed) and Strike Rate is calculated as (Runs scored/100 balls faced).
As we all know, the simplest form of data representation is in the tabular form. In this article we will try to understand what are expected from tables and also how to analyze the data, along with trying to predict the types of questions which could be asked from a given set of data.
Some things that we should follow while solving a DI set:Understanding the table:
While solving any data interpretation set, one should spend a minute in understanding the information given. In many cases, proper understanding helps answer questions faster.Identifying the missing parameters:
This is the second step where one tries to identify what is missing in the table. As above, we see the scores but not the average. Additionally, the moment we identify the missing links we are able to predict the most probable questions which could be asked in relation to the given data.Predicting the questions: In a tabular DI, the majority of the questions will be calculation intensive, as most tables are filled with numbers. The calculations will include addition, difference, percentages, averages, ranking etc. In the given table, there will definitely be questions on strike rates and the batting averages of the players as those parameters are missing.
In the given table, easy questions are the ones directly related to any one batsman e.g. “D A Warner scored what percentage of his runs in boundaries?” or when we compare – “What is the percentage difference between the total runs scored by the top three batsman and the bottom three batsman out of the given top ten?”
When it comes to making the questions difficult, what one easily does is to making you calculate multiple times while solving a question – “Which batsman has the fourth highest average score among the given batsman?” – To find the fourth highest, one has to calculate the averages of all 10 and then rank them. To make matters worse, a question could be framed thus – “The batsman whose strike rate (runs scored/100 balls faced) is 4th highest overall, scored what percentage more runs than the person ranked least in terms of batting average?”Nature of options: In a Table, the options given against the questions can be very close to each other as the examiner might check us on our calculation skills. Those who love doing approximations might find solving tables a bit tricky and can end up marking the wrong answer quite easily.
One very interesting thing about the table based DI sets is that if we understand the table properly, predicting the type of questions would not be difficult. But some of the answers can really be time consuming depending on the amount of calculations involved and sometimes the options can be very close to each other.…..So be careful with those questions.
Find below some questions given for your practice:
- Which player has the highest batting average?
- Which player has the highest strike rate?
- By what percentage is the total runs scored by Virat Kohli more than that of KA Pollard?
- What is the combined strike rate of the top 3 batsman?
- Runs scored in sixes is what percentage more than that of fours for all the 10 batsman taken together?
- Which batsman has scored the maximum percentage of his runs in sixes?
- Which batsman has scored the maximum percentage of his runs in fours?
- Which batsman could have played the maximum percentage balls without scoring?
While solving the questions please take note of the time that you are taking as time is a very major factor in scoring good marks in DI.