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GMAT Data Interpretation — practice questions

Explore 9 free Data Interpretation questions in GMAT Data Insights. Open each question or exercise to read its content, reference answers and available explanation.

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Data Interpretation questions and exercises with answers

Showing questions 1–9 of 9.

In a school of 600 students, 40% play sports. Of those who play sports, 25% play cricket. What percentage of all students play cricket?Read the answer and worked solution →The price of a litre of petrol rose from ₹80 to ₹100. What is the percent increase?Read the answer and worked solution →In a survey of 100 people, 60 drank tea, 50 drank coffee, and 30 drank both. How many drank neither?Read the answer and worked solution →In how many distinct ways can 5 people be seated around a circular table?Read the answer and worked solution →In a row of 7 seats, Anjali sits at one end and Rohan sits third from the left. How many seats remain unfixed?Read the answer and worked solution →In a CAT LRDI caselet, which approach is generally LEAST efficient on the first pass?Read the answer and worked solution →A pie chart shows a slice of central angle 72° representing food spending. What percentage of total spending was on food?Read the answer and worked solution →A market vendor's sales were ₹40,000 last year and ₹50,000 this year. The percent increase is:Read the answer and worked solution →In a CAT DILR caselet, what is the recommended FIRST step?Read the answer and worked solution →

Worked practice questions

In a school of 600 students, 40% play sports. Of those who play sports, 25% play cricket. What percentage of all students play cricket?

  1. $65\%$
  2. $15\%$
  3. $10\%$
  4. $40\%$
Show answer and solution

Correct answer: C. $10\%$

40% of 25% = 0.40 × 0.25 = 0.10 = 10% of all students. Adding (65%) or subtracting (15%) the percentages are the classic CAT traps.

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The price of a litre of petrol rose from ₹80 to ₹100. What is the percent increase?

  1. $20\%$
  2. $25\%$
  3. $80\%$
  4. $125\%$
Show answer and solution

Correct answer: B. $25\%$

Percent change = (100 − 80)/80 × 100 = 20/80 × 100 = 25%. Using 100 (the new value) as the base would give 20%, a classic CAT trap.

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In a survey of 100 people, 60 drank tea, 50 drank coffee, and 30 drank both. How many drank neither?

  1. $10$
  2. $20$
  3. $30$
  4. $40$
Show answer and solution

Correct answer: B. $20$

Union (tea or coffee) = 60 + 50 − 30 = 80. Neither = total − union = 100 − 80 = 20.

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More Data Insights topics

Averages and MixturesDescriptive StatisticsData SufficiencyDI — Bar & Column ChartsDI — Pie ChartsDI — TablesCAT DILR — CaseletsQuantitative Aptitude