Data Interpretation Tests — Pick a Level and Start
Tap a level to see every test in it. Level 1 is set at real SSC CGL difficulty — start there once percentage, ratio and average feel comfortable. Level 2 is pitched above the exam, to push accuracy under pressure.
Level 1 SSC CGL Level Checking… View tests
Same difficulty as the real SSC CGL paper — one careful reading and one calculation. Totals and differences; ratios between two cells; percentage shares of a row or column; percentage increase and decrease; averages; a missing table entry; derived quantities such as price × quantity; bars, grouped bars, stacked bars and horizontal bars; single and double line graphs and growth-rate lines; pie charts in per cent and in degrees, two pies with different totals and a pie read with a table; histograms, bar-and-line combos, caselets and cumulative frequency tables. A steady score here means the chapter is exam-ready.
Level 2 Above SSC CGL Level Checking… View tests
Harder than the exam asks, because every question chains two steps or runs one backwards. Filter first, then compute — only the years that rose, only the stores above a limit; a rate for every row before comparing; the value of 1% from the gap between two pie sectors; an unlabelled bar from the total; two successive percentage falls; a weighted average across unequal groups; a combined ratio that cannot be made by adding ratios; the base year worked back from a growth-rate line; and thresholds where “exactly 10%” decides the count. Clear these and the real paper feels easy.
A data interpretation question is mostly arithmetic you already know — percentage, ratio and average — applied to numbers you have to read correctly first. The chart gives the data; the question tells you which few numbers matter. The skill is reading exactly what is asked: the right bar, the right year, the right series, and the right base for every percentage.
The marks are lost in three places. The first is the wrong base — “A is what per cent more than B” divides by B, not by A, and a percentage change always divides by the old value. The second is mixing up per cent and percentage points: a share moving from 20% to 30% has risen by 10 percentage points, which is a 50% increase in the share. The third is adding or averaging things that cannot be added — growth rates of groups of different sizes, ratios from different departments, or two successive 10% falls, which make 19% and not 20%. Each test puts twenty-five chart and table questions in front of you in one sitting, which is what makes those checks automatic.
How Many Data Interpretation Questions Are Asked in SSC CGL?
Data interpretation appears in almost every shift. Tier I usually has a small set of two to three questions on one table, bar chart or pie chart, and Tier II Paper I has a few more. Because the arithmetic is simple, these are some of the most scoring questions in the maths section.
| Chapter | Tier I (out of 25) | Tier II Paper I (out of 30) |
|---|---|---|
| Data Interpretation (tables, bar, line and pie charts) | 2–3 | 3–5 |
| Percentage, Ratio and Average (the arithmetic DI uses) | 3–4 | 4–6 |
Counts vary by shift. In the exam, one chart usually carries two or three questions; in these tests every question stands alone with its own chart, so you meet many more chart shapes per sitting.
What You Will Practice in the Data Interpretation Chapter
Tables
- Row and column totals, differences and sums over a named range of years
- Ratios between two cells, two rows or two column totals
- A cell as a percentage of its row or of its column, and percentage change between years
- Averages of a row or a column, a missing entry from a total, an average or a percentage share
- Derived quantities — price × quantity, pass rates, running stock, aggregate percentages when the maximum marks differ
- Counting rows that meet one or two conditions, and cumulative (less-than and more-than) frequency tables
Bar and line charts
- Simple bars and horizontal bars — totals, differences, ranges and one bar as a percentage of another
- Grouped bars — one series against another, gaps, shares and the category with the best rate
- Stacked bars — block values, bar totals, shares, and blocks read from running-total labels
- Line graphs — year-on-year change, the steepest rise or fall, the gap between two lines, and lines that show a growth rate or profit per cent instead of a value
- Bar-and-line combos — quantity on the bars, rate or price on the line
Pie charts, histograms and caselets
- Pie charts in per cent and in degrees — a sector’s value, a sector from another sector, and the total from a gap
- Two pies with different totals — comparing the same head across two years or two groups
- A pie read with a table — head-counts from the pie, then a ratio or a rate from the table
- Histograms — counts in a range, shares above a cut-off and the modal class
- Caselets — data given only in words, including two-way splits and overlapping groups
Formulas worth memorising
| Situation | Formula |
|---|---|
| Percentage share | part ÷ total × 100 |
| Percentage change | (new − old) ÷ old × 100 |
| A is more than B by | (A − B) ÷ B × 100; A is less than B by (B − A) ÷ B × 100 |
| Pie sector from degrees | value = θ ÷ 360 × total; 1% = 3.6° |
| Total from a gap between two sectors | 1% = gap in rupees ÷ gap in percentage points |
| Average and weighted average | sum ÷ count; Σ(n × x) ÷ Σn when the groups differ in size |
| Successive changes | (1 + a)(1 + b) − 1; two 10% falls give 1 − 0.81 = 19% |
| Profit per cent | (income − expenditure) ÷ expenditure × 100 |
| Revenue | quantity × price, row by row, then add |
| Cumulative tables | less-than: count in [L, U) = F(U) − F(L); more-than: G(L) − G(U) |
| Stacked bar with running totals | block = label at its top − label at the block below |
| Combined ratio of groups | turn each group into counts first, then add — never add the ratio terms |
The first four rows answer most Tier I questions. The base of every percentage is the number after “of” or “than” — circle it before you calculate.
The three mistakes that cost the most marks
- Dividing by the wrong base. A rise from 250 to 300 is 20% of 250, not 16.7% of 300. “More than B” and “of B” both put B underneath.
- Confusing per cent with percentage points. A share going from 30% to 36% is up 6 percentage points; a pass rate of 85% against 68% is 25% higher, not 17%.
- Adding what should be weighted. The average of three schools’ growth rates is not the town’s growth, and 3 : 2 plus 7 : 3 is not 10 : 5. Go back to the actual counts.
Solved Examples — SSC CGL Data Interpretation Questions
= (new − old) ÷ old × 100 = (300 − 240) ÷ 240 × 100 = 60 ÷ 240 × 100. Dividing by 300 instead would give 20% — the wrong base. Answer: 25%= θ ÷ 360 × total = 72 ÷ 360 × 50,000 = ⅕ × 50,000. Answer: ₹10,0001,000 → 1,090, so the rise is 90 ÷ 1,000 × 100. Answer: 9%30 − 20 = 10 percentage points, worth ₹4,000, so 1% = ₹400 and the total is 100 × 400. Answer: ₹40,000How the Data Interpretation Chapter Tests Work
- 25 questions per test, with a full question palette — answered, skipped, marked for review, not visited.
- 15 to 18 chart questions in every test, each with its own clearly labelled bar, line, pie, histogram or combo chart; tables are shown as text right in the question.
- Optional 15-minute timer — with the clock to build exam speed, without it while you are still learning the chapter.
- Marking: +2 correct, −0.5 wrong, 0 unattempted — the same scheme as the real paper.
- Solutions, shortcut tricks and concept notes open after you submit, question by question — including why each tempting wrong option is wrong.
- English and हिंदी, chosen at the start of every test.
- Free with a TrickySSC account — sign in once with Google or your mobile number, and every test is open to you.
How to Prepare Data Interpretation for SSC CGL
- Get percentage, ratio and average fast first. Data interpretation adds no new maths; it only tests how quickly and cleanly you apply these three.
- Read the question before the chart. Know which year, series and operation you need, then pick only those numbers off the chart.
- Check the units and the scale. Thousands against lakhs, crores against lakhs, and per cent against degrees change the answer by a factor.
- Circle the base of every percentage. It is the number after “of”, “than” or “over the previous year”.
- Learn the fraction–percentage table.
1/8 = 12.5%,1/6 = 16.67%,1/3 = 33.33%and3.6° = 1%turn most pie and growth questions into mental maths. - Compare with ratios, not full division. To find the largest percentage, a quick cross-multiplication is often enough.
- Never add percentages or ratios across unequal groups. Convert to actual numbers, add those, then convert back.
- Watch “more than” and “at least”. Threshold questions are decided by whether a value exactly on the line counts.
- Do Level 1 untimed, the same week you revise percentage and ratio. It is set at real SSC CGL difficulty; the aim is reading correctly, not speed.
- Repeat Level 1 with the 15-minute clock on, then move to Level 2. After that, verify against a previous year paper and a full mock test under locked sectional timing.
All SSC CGL Chapter Wise Tests
Every chapter below has its own free Level 1 and Level 2 tests with full solutions.
Browse all 45 chapter tests — Maths (35) · Reasoning (10)
- Number System
- Rule of Divisibility
- Remainder Theorem
- Decimal & Fraction
- LCM & HCF
- Square & Cube Root
- Number Series (AP & GP)
- Power, Indices & Surds
- Algebraic Formula
- Algebraic Result
- Algebraic Expression & Identities
- Percentage
- Profit & Loss
- Discount & Marked Price
- Simple Interest
- Compound Interest
- Ratio & Proportion
- Partnership
- Average
- Problems on Ages
- Mixture & Alligation
- Time & Work
- Pipe and Cistern
- Time, Speed and Distance
- Quadratic Equation
- Boat and Stream
- Races
- Trigonometry
- Heights & Distances
- Geometry
- Mensuration
- Coordinate Geometry
- Probability
- Statistics
- Data Interpretation
- All Maths chapters →
SSC CGL आँकड़ों का निर्वचन (Data Interpretation) चैप्टर टेस्ट — हिंदी में
आँकड़ों के निर्वचन (DATA INTERPRETATION) का हर प्रश्न असल में प्रतिशत, अनुपात और औसत का ही प्रश्न है — बस संख्याएँ पहले तालिका, बार ग्राफ़, रेखा ग्राफ़ या पाई चार्ट से सही-सही पढ़नी होती हैं। प्रश्न पहले पढ़ें, फिर चार्ट से केवल वही वर्ष, वही श्रेणी और वही संख्याएँ उठाएँ जिनकी ज़रूरत है।
अंक तीन जगह कटते हैं। पहली: गलत आधार — “A, B से कितने प्रतिशत अधिक है” में B से भाग देना है, और प्रतिशत परिवर्तन में हमेशा पुराने मान से। दूसरी: प्रतिशत और प्रतिशत अंक (PERCENTAGE POINTS) में भ्रम — 20% से 30% होना 10 प्रतिशत अंक की वृद्धि है, जो हिस्से में 50% की वृद्धि है। तीसरी: असमान समूहों के प्रतिशत या अनुपात सीधे जोड़ देना — लगातार दो बार 10% की कमी कुल 19% होती है, 20% नहीं; अलग-अलग आकार के समूहों में पहले वास्तविक संख्याएँ निकालें, फिर जोड़ें।
TrickySSC पर इस अध्याय के सभी टेस्ट हिंदी में उपलब्ध हैं — प्रश्न, विकल्प, चार्ट, विस्तृत हल और शॉर्टकट ट्रिक सब हिंदी में। दो स्तर हैं: लेवल 1 (SSC CGL के स्तर का) और लेवल 2 (SSC CGL से कठिन)। प्रत्येक टेस्ट में 25 प्रश्न, वैकल्पिक 15 मिनट का टाइमर और +2 / −0.5 की वही मार्किंग जो असली परीक्षा में होती है।