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The importance of Data Interpretation and Logical Reasoning to clear CAT and other MBA examinations can never be undermined. Since CAT moved back to the 3-section pattern from 2015 onwards, with Logical Reasoning and Data Interpretation being section 2 of the exam, the importance of logical reasoning and data interpretation has got enhanced drastically.
The current pattern of CAT has Data Interpretation and Logical Reasoning as one of its three sections containing a total of 32 questions out of the total 100 questions in the exam. These 32 questions are typically divided between DI (16 questions divided into 4 sets of 4 questions each) and Logical Reasoning (16 questions divided into 4 sets of) questions. While this has been the pattern of the DI-LR section of the CAT, the latest papers – especially the ones after 2017 have started to become increasingly more difficult.
Thus, while the earlier CAT papers required you to solve 20–22 questions (all correct) to score a 98+ percentile in this section, the latest papers (2017 onwards), you would need to solve only 14-16 questions in order to achieve the same percentile. This is just an indication of the increased level of difficulty of the sets in the Data Interpretation and Logical Reasoning section of the CAT – and naturally would and should drastically change the process you adopt to prepare this all-important section of the exam. In the current difficulty level of this exam, you require to do just 4 sets out of 8 to get in the 95–98 percentile range. If you are able to attempt 5+ sets and 20–22 questions (all correct) out of 34, you will get a very high 99+ percentile (even going as high as 99.7+ percentile at 22 attempts). In fact, if you can go all the way to 6 to 6 and a half sets with 24–25 attempts with a maximum of 1 error, you would get a 100 percentile.
In this context, you would undermine the importance of LRDI prep at your own risk. You are advised to not fall into the trap that most aspirants fall into – viz: not giving enough importance to this section during your preparation journey.
The evidence of the latest CAT papers shows us that out of the 8 sets being asked in the DI–LR section, 4 sets would be extremely tough (Level of Difficulty 3), 2–3 sets would be of a tough level (level of Difficulty 2). In comparison, only 1 to 2 sets would be normal difficulty levels. Imagine a test in which these two easy sets fall under Data Interpretation. You have not really focussed on DI during preparation- as you adopted the strategy of doing more LR. What you would lose out on in such a scenario would be the opportunity to score the easy marks in the section by doing the DI and would be forced to go to the challenging LR questions to score in the section. Naturally, you would be losing out hugely to your competitors in such a scenario.
Hence, you are advised to treat both these subjects DI and LR, with the same intensity and do everything in your power to maximise your skills for them.