Now let's come to our topic. How to use visual estimation technique to solve Data Interpretation questions. Let's take a visual example :-
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Example - Red bars state 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.
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.
Only thing that you require to score well in data interpretation questions is fast calculation. 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 many techniques which makes calculations easy. No teacher is going to teach techniques in the class. You need to learn them with practice.
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