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CAT Data Interpretation Questions
Practise data interpretation (data interpretation) for the Common Admission Test: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Data Interpretation practice
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Q1.The price of an item changes from ₹300 to ₹240. What is the percentage change?
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Answer: A — 20% decrease
Change = -60 on a base of 300: -60/300 × 100 = 20% decrease. Always divide by the ORIGINAL value.
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Q2.Sales (units): 2021: 580 · 2022: 790 · 2023: 510 · 2024: 250 · 2025: 570. What was the percentage change in 2023 over 2022?
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Answer: D — -35.44%
Change = 510 − 790 = -280; ÷ 790 × 100 = -35.44%.
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Q3.Sales (units): 2021: 200 · 2022: 880 · 2023: 370 · 2024: 440 · 2025: 780. What was the percentage change in 2022 over 2021?
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Answer: B — 340%
Change = 880 − 200 = 680; ÷ 200 × 100 = 340%.
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Q4.The price of an item changes from ₹375 to ₹337.5. What is the percentage change?
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Answer: C — 10% decrease
Change = -37.5 on a base of 375: -37.5/375 × 100 = 10% decrease. Always divide by the ORIGINAL value.
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Q5.The average of 10 numbers is 32. If 45 is added, what is the new average?
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Answer: B — 33.18
Old total = 10 × 32 = 320. New total = 320 + 45 = 365; new average = 365/11 = 33.18.
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Q6.Sales (units): 2021: 890 · 2022: 210 · 2023: 370 · 2024: 880 · 2025: 380. What was the percentage change in 2025 over 2024?
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Answer: D — -56.82%
Change = 380 − 880 = -500; ÷ 880 × 100 = -56.82%.
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Q7.The average of 7 numbers is 61. If 91 is added, what is the new average?
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Answer: C — 64.75
Old total = 7 × 61 = 427. New total = 427 + 91 = 518; new average = 518/8 = 64.75.
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Q8.The average of 7 numbers is 67. If 90 is added, what is the new average?
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Answer: B — 69.88
Old total = 7 × 67 = 469. New total = 469 + 90 = 559; new average = 559/8 = 69.88.
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Q9.The average of 12 numbers is 73. If 81 is added, what is the new average?
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Answer: A — 73.62
Old total = 12 × 73 = 876. New total = 876 + 81 = 957; new average = 957/13 = 73.62.
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Q10.The price of an item changes from ₹100 to ₹80. What is the percentage change?
Show answer & explanation
Answer: A — 20% decrease
Change = -20 on a base of 100: -20/100 × 100 = 20% decrease. Always divide by the ORIGINAL value.
How to approach data interpretation questions
Read the table title, units and years before calculating. Approximate first — answer options are often far enough apart that rounding to two significant figures is safe.
About CAT
Common Admission Test — conducted by Indian Institutes of Management (convening IIM rotates). The entrance exam for IIM MBA programmes, with VARC, DILR and Quantitative Ability sections.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
CAT practice topics
| Topic | Section | Question source |
|---|---|---|
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Ratio, Ages & Mixtures | Quantitative aptitude | Calculated (new numbers every set) |
| Time, Work & Pipes | Quantitative aptitude | Calculated (new numbers every set) |
| Algebra | Mathematics | Calculated (new numbers every set) |
| Geometry & Mensuration | Mathematics | Calculated (new numbers every set) |
| Data Interpretation | Data interpretation | Calculated (new numbers every set) |
| Verbal Reasoning & Analogies | Reasoning | Calculated + question bank |