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GRE Data Interpretation Questions
Practise data interpretation (data interpretation) for the GRE General 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 average of 11 numbers is 62. If 93 is added, what is the new average?
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Answer: A — 64.58
Old total = 11 × 62 = 682. New total = 682 + 93 = 775; new average = 775/12 = 64.58.
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Q2.The price of an item changes from $375 to $281.25. What is the percentage change?
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Answer: B — 25% decrease
Change = -93.75 on a base of 375: -93.75/375 × 100 = 25% decrease. Always divide by the ORIGINAL value.
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Q3.Sales (units): 2021: 740 · 2022: 350 · 2023: 540 · 2024: 740 · 2025: 830. What was the percentage change in 2023 over 2022?
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Answer: B — 54.29%
Change = 540 − 350 = 190; ÷ 350 × 100 = 54.29%.
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Q4.The price of an item changes from $500 to $540. What is the percentage change?
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Answer: D — 8% increase
Change = 40 on a base of 500: 40/500 × 100 = 8% increase. Always divide by the ORIGINAL value.
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Q5.Sales (units): 2021: 400 · 2022: 760 · 2023: 490 · 2024: 390 · 2025: 210. What was the percentage change in 2025 over 2024?
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Answer: C — -46.15%
Change = 210 − 390 = -180; ÷ 390 × 100 = -46.15%.
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Q6.The average of 12 numbers is 23. If 36 is added, what is the new average?
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Answer: A — 24
Old total = 12 × 23 = 276. New total = 276 + 36 = 312; new average = 312/13 = 24.
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Q7.The average of 9 numbers is 73. If 100 is added, what is the new average?
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Answer: D — 75.7
Old total = 9 × 73 = 657. New total = 657 + 100 = 757; new average = 757/10 = 75.7.
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Q8.Sales (units): 2021: 320 · 2022: 490 · 2023: 760 · 2024: 880 · 2025: 510. What was the percentage change in 2024 over 2023?
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Answer: A — 15.79%
Change = 880 − 760 = 120; ÷ 760 × 100 = 15.79%.
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Q9.The average of 6 numbers is 46. If 53 is added, what is the new average?
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Answer: C — 47
Old total = 6 × 46 = 276. New total = 276 + 53 = 329; new average = 329/7 = 47.
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Q10.The price of an item changes from $275 to $316.25. What is the percentage change?
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Answer: D — 15% increase
Change = 41.25 on a base of 275: 41.25/275 × 100 = 15% increase. 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 GRE
GRE General Test — conducted by Educational Testing Service (ETS). Graduate admission test with Verbal Reasoning, Quantitative Reasoning and Analytical Writing.
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.
GRE practice topics
| Topic | Section | Question source |
|---|---|---|
| Percentages | 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) |
| Probability & Combinatorics | Mathematics | Calculated (new numbers every set) |
| Vocabulary & Idioms | English | Question bank |