How to improve in Data and Reasoning

DI and AR form an integral part of every competitive exam. Some exams have complete section on DI and AR, some exams have DI clubbed with Quant and AR could be separate. Since DI involves lots of calculations and approximations, so you need to revise tables along with percentage chart i.e. conversion of fractions to percentage and vice versa. Learning tables and percentage chart would help you in increasing your calculation speed and you will be able to approximate in a better manner. Besides that you need to revise the basics of all the types of graphs that are primarily asked in the exam i.e. tables, pie charts, line graph and bar diagram etc. Practice DI to the fullest as this is the only way to crack this section. As far as Analytical Reasoning is concerned, there is no theory for the same. You should just go through the solved examples given and get the approach of solving these types of questions. Read and grasp the concepts of some important topics like Syllogism, Logical Connectives etc as it would help in understanding the topic better. Getting exposure to as many different sets of AR as possible would make your horizon wider to deal with the AR questions. In AR, the only success mantra is PRACTICE, PRACTICE and PRACTICE.
These days questions do appear from an area that can be broadly defined as data and reasoning. It basically gives you data in some form followed by sufficient information in the form of directions. After the interpretation of the data you have to follow the given instructions logically to answer the questions. These sets have a strong application from the concepts of Venn diagram or set theory. Revising these concepts and solving some quality sets can make you perform better in the data and reasoning questions.
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The following articles written on data interpretation would also prove to be of great help to you.
Mastering DI - Tricks & Traps Bar Diagrams
Data Caselets
Pie Chart - Angles, Values, Times
Line graphs
Use of weighted average in graphs
Data Interpretation - Tables
You can go through the following videos.
Achievers Classroom - Data Interpretation Advanced 1
Percentage Change & Approximation Basic
Data - Lines & Bar Graphs
Pie Chart
Percentage and fractions
You can solve the following practice tests
Data Table Test 01
Data Table Test 02
Data Table Test 03
Data Table Test 04
Data Table Test 05
Data & Reasoning 102
Data & Reasoning 101
Data Basic - 01
Data Basic - 02
Data Basic - 03
Data Basic - 04
Data Basic - 05
Data Basic - 06
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