Data Interpretation & Statistics
Data interpretation is not a maths topic — it is a reading topic with arithmetic attached. The questions are easy; the table or graph is where candidates lose time. Read the headings and units before you look at a single number, and most DI sets take a third as long.
Don't read this page — work through it. Each block asks you to commit to an answer before it tells you anything.
Start here: what do you already know?
Data interpretation — true or false?
6 statements · 12s each
The four things to read first
| Read | Why it matters |
|---|---|
| Title | Tells you what the numbers actually are |
| Units | "In lakhs" or "in thousands" scales every answer |
| Row/column headings | Decides which direction you add |
| Footnotes | Often carry an exception that one question depends on |
Thirty seconds spent here saves several minutes across the set.
A worked table
Sales of a company (in lakhs of rupees):
| Year | Product A | Product B | Total |
|---|---|---|---|
| 2022 | 40 | 60 | 100 |
| 2023 | 50 | 70 | 120 |
| 2024 | 60 | 90 | 150 |
From this: A's growth from 2022 to 2024 is (60−40)/40 = 50%. Note the base is the earlier year, always.
Sort by what the question needs
Does this need exact calculation or just estimation?
0/6What is the exact percentage increase?
Which group does it belong to?
Commit to the answer
Use the sales table above for these.
Method, in order
Match the concept to its rule
Quick reference
Exam tip: DI is where fast candidates gain the most. The arithmetic is easy — the time goes on re-reading the table. Read it once, properly, and answer from what you already understood.