Data interpretation practice for bank exams is free here, and the table, bar graph and line graph sets are generated afresh with computed answers, so you never run out. Pie chart sets are written by hand. DI usually carries around 10 Prelims and 15 Mains quant questions in our mock blueprints, which makes it the biggest single block in the section.
Why DI deserves its own practice time
DI questions come in sets: one table or chart, then four or five questions on it. That is a lot of marks resting on one figure. If you read it well, you can answer the set quickly. If you misread one label, you can lose the whole set.
DI also tests every arithmetic idea at once: percentage, ratio, average, and sometimes profit or growth. If your percentages are slow, DI will be slow. That is why DI comes after percentage and ratio in a sensible study order.
The DI types you will meet
| Type | What it looks like | On this site |
|---|---|---|
| Table DI | Rows and columns of figures | Generated, unlimited |
| Bar graph | Bars for years, branches or products | Generated, unlimited |
| Line graph | Trends over time, often two lines | Generated, unlimited |
| Pie chart | Shares of a total, in percent or degrees | Written sets |
| Caselet and mixed | A paragraph of data, or two charts together | More common in Mains; practise once the basic types are steady |
A worked mini set
Savings accounts opened at a branch: January 240, February 300, March 270, April 330.
- Percentage increase from January to February? (300 − 240) ÷ 240 × 100 = 60 ÷ 240 × 100 = 25%.
- Average accounts per month? (240 + 300 + 270 + 330) ÷ 4 = 1,140 ÷ 4 = 285.
- Ratio of March to April? 270 : 330 = 9 : 11 (divide both by 30).
- April is what percent more than March? 60 ÷ 270 × 100 ≈ 22.2%.
Notice that questions 1 and 4 both involve a difference of 60 but give different answers because the base changes. "More than March" means March is the base. Reading the base correctly is the most common DI mistake.
Pie charts: degrees and percentages
Pie charts give shares of a total, either in percent or in degrees. The whole pie is 100% or 360°, so 1% = 3.6°.
Example. A family's monthly spending is ₹48,000. Rent takes 25% of the pie. Another slice, food, is shown as 72°.
- Rent = 25% of 48,000 = ₹12,000. In degrees, 25% × 3.6 = 90°.
- Food = 72 ÷ 360 = 1/5 = 20% of 48,000 = ₹9,600.
- Rent is how much more than food? 12,000 − 9,600 = ₹2,400, which is 25% more than food (2,400 ÷ 9,600).
The trick is to convert degrees to a simple fraction of 360 straight away. 72° is one-fifth, 45° is one-eighth, 120° is one-third. Then the rupee figures follow in one step.
Five speed habits for DI
- Read all the questions before calculating. Often two questions need the same total, so work it out once.
- Use fractions for percentages. 12.5% is 1/8, 16.67% is 1/6, 37.5% is 3/8.
- Approximate when the options are far apart. If options are 18%, 22%, 27%, 31% and 36%, you do not need decimals.
- Write totals on the rough sheet. Row and column totals save repeated addition.
- Skip a set if the figure is confusing. There is usually another DI set in the same section.
A practice ladder for DI
- Untimed table DI until your accuracy is steady.
- Timed table and bar DI, two sets a day.
- Line graphs and pie charts, mixing types.
- Mains-level DI: bigger figures, two variables, missing values.
- DI inside Quant sectional mocks, where you must choose which set to attempt.
Our DI FAQ covers how to choose between sets in the exam.
Questions people ask
How many DI questions come in SBI Clerk?
It varies by paper. Previous papers have usually had one or two DI sets in Prelims and more in Mains. Our mocks give about 10 DI questions in Prelims and about 15 in Mains.
Are DI sets generated or written?
Table, bar graph and line graph sets are generated with computed answers, so they never run out. Pie chart sets are written by hand.
How do I convert pie chart degrees to percentages?
Divide the degrees by 3.6, since 360° is 100%. So 90° is 25% and 72° is 20%. Converting to a simple fraction of 360 is often even quicker.
What should I learn before starting DI?
Percentage, ratio and average. Most DI questions are combinations of these, so learn them first and DI becomes much faster.
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