Data interpretation is the most scoring and time-consuming section in IBPS and other competitive examinations. Today I am sharing quick estimation techniques to solve Data interpretation questions:-
Now check this:-
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 an increase of 5 tonnes in production both wheat and rice production every year.
10% of 50 = 5
10% of 70 = 7
So the answer should 2006.
In the above example, you can find the 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.
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, the answer should be around 2.2%
Visual Estimation
Give a look to this diagram
Now check this:-
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 an increase of 5 tonnes in production both wheat and rice production every year.
10% of 50 = 5
10% of 70 = 7
So the answer should 2006.
Finding averages
Many times in Data Interpretation, questions are asked to find the average of many big numbers. As all these numbers are from the same graph, there is a high probability that these number will be close to each other. Take a look at following visual example:-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
The only thing that you require to score well in data interpretation questions is the calculation speed. 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, the 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.
