Tips on Answering Aptitude Questions on Data Interpretation

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4 TIPS on answering Aptitude Questions on Data
Interpretation
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Tip 1 Use a physical calculator and a notepad
Online proctored tests disallow candidates from
using Calculator Software Applications in
Desktop/ Laptop/ Mobile Device where the test is
being given. However, a separate handheld
calculator can be used.
Use a notebook with a pencil to jot down relevant
numbers to help you in making quick calculations.
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Tip 2 While calculating averages, it is easier
to assume an approximate mean and calculation
average of differences from that mean
Question What is the average marks scored by the
student across all six periodical
exams? Solution You can assume the mean to be
380. The differences from the assumed mean are
-20, -15, -10, 5, 20, 25 Average of the
differences 0.83333
Average Marks Assumed Mean Average Difference
380.8333
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Tip 3 Percentage of Change (Increase/ Decrease)
Difference/ Original Value 100
Question If the expenditure in 2000 is 25 more
than expenditure in 1997, then the income in 1997
is what percent less than the income in
2000? Solution Assume that Expenditure in 1997
is Rs 100. Expenditure in 2000 Rs 125. Profits
in 1997 Rs 45 (45 of exp) Income in 1997 Rs
145 Profits in 2000 Rs 75 (60 of exp) Income
in 2000 Rs 200
Change in income from 2000 to 1997 Change/
Original Value x 100 55/200 100 27.5
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Tip 4 Grasp the information from the chart
visually to answer some questions very quickly
Question Nearly 20 of the funds are to be
sourced through? Solution Roughly a quarter of
all the funds are to be sourced through this
channel. Which implies a sector with an angle of
around 90
The only sector with an angle close to 90 is
External Assistance.
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