Data Interpretation Questions with Solutions

Data interpretation (DI) questions present data in a table, bar graph, line graph, pie chart or a combination, and ask a set of questions based on it. The questions test calculation skills applied to real-looking data: percentages and percentage change, ratios, averages, growth rates, and comparisons between years or categories. Speed comes from two habits. First, read the chart carefully before answering, including its title, units and scale. Second, approximate wherever the options are far enough apart. Strong percentage and fraction skills (knowing that 1/8 = 12.5% or 1/6 = 16.67%) make most DI calculations quick. For pie charts, remember that a full circle is 360 degrees and each 1% equals 3.6 degrees. In the exam, attempt the DI sets with the cleanest data first. Practise the data interpretation sets below. Each question has a step-by-step solution with approximation shortcuts.