1. data-interpretation-s01-q01
A library's loan record for one week shows: Monday 42 loans, Tuesday 38, Wednesday 51, Thursday 45, Friday 60. How many loans were recorded on Wednesday?
- 51
- 45
- 38
- 60
Answer:
This is untimed educational practice for one cognitive skill. It is not a clinical, diagnostic, employment, or professionally recognized assessment, and it does not produce an IQ score or credential.
One hundred untimed self-check questions in ten themed sections, from simple table reading to spotting flawed conclusions. Every figure you need is given in the question. Work from the data alone.
Choose one answer for each item. For a delayed-recall item, read its study text, cover it, and then answer without looking back.
Find the right cell in each described table and read it accurately.
1. data-interpretation-s01-q01
A library's loan record for one week shows: Monday 42 loans, Tuesday 38, Wednesday 51, Thursday 45, Friday 60. How many loans were recorded on Wednesday?
Answer:
2. data-interpretation-s01-q02
A weather station records monthly rainfall: April 62 mm, May 48 mm, June 35 mm, July 20 mm. Which month had the least rainfall?
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3. data-interpretation-s01-q03
A market stall's takings table shows: apples £24, pears £31, plums £19, cherries £42. How much more did cherries take than plums?
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4. data-interpretation-s01-q04
A car park log lists vehicles by type: cars 120, vans 35, motorcycles 18, lorries 9. How many vehicles were logged in total?
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5. data-interpretation-s01-q05
A museum's visitor table shows: Saturday morning 210, Saturday afternoon 340, Sunday morning 180, Sunday afternoon 290. Which single period had the most visitors?
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6. data-interpretation-s01-q06
A school's absence table reads: Year 7: 12, Year 8: 9, Year 9: 15, Year 10: 9, Year 11: 6. How many year groups recorded exactly 9 absences?
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7. data-interpretation-s01-q07
A bus timetable lists departures at 08:10, 08:35, 09:00 and 09:25. How many minutes apart are consecutive departures?
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8. data-interpretation-s01-q08
A stationery stock table shows: pens 240, pencils 310, rulers 95, erasers 150. Which item has the lowest stock?
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9. data-interpretation-s01-q09
A café's drinks table records: tea 58 cups, coffee 84 cups, hot chocolate 27 cups. How many cups were sold in total?
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10. data-interpretation-s01-q10
A courier's delivery log shows: Week 1: 74 parcels, Week 2: 81, Week 3: 74, Week 4: 88. How many parcels were delivered in Week 2?
Answer:
Compare bar-chart style category figures: differences, sums, and multiples.
11. data-interpretation-s02-q01
A bar chart of phone-case sales by colour shows: black 45, white 30, blue 25, red 20 units. How many more black cases than red cases were sold?
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12. data-interpretation-s02-q02
Fun-run entrants by age group: under-18 64, 18–35 112, 36–50 98, over-50 46. Which two groups together account for exactly 210 entrants?
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13. data-interpretation-s02-q03
A gym's attendance chart shows: Monday 85, Wednesday 92, Friday 78, Sunday 105. What is the combined attendance of the two busiest days?
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14. data-interpretation-s02-q04
A bookshop's sales chart shows: fiction 120, biography 45, cookery 60, travel 30. How many times as many fiction books as travel books were sold?
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15. data-interpretation-s02-q05
A chart compares two branches: North sold 340 units and South sold 290 units. How many more units would South need to sell to match North?
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16. data-interpretation-s02-q06
An ice-cream stand's chart shows tubs sold by flavour: vanilla 72, strawberry 55, mint 38, mango 41. Which flavour sold fewer than 40 tubs?
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17. data-interpretation-s02-q07
A chart shows attendance at four workshops: Workshop 1 had 28, Workshop 2 had 34, Workshop 3 had 22, Workshop 4 had 36. What was the total attendance?
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18. data-interpretation-s02-q08
A recycling chart shows amounts collected: paper 340 kg, glass 275 kg, plastic 180 kg, metal 95 kg. What is the difference between the highest and lowest amounts?
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19. data-interpretation-s02-q09
A chart shows quarterly sign-ups: Q1 150, Q2 180, Q3 210, Q4 240. Which quarter's sign-ups were exactly 60 higher than Q2's?
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20. data-interpretation-s02-q10
A cinema's chart shows tickets sold by film: Comet Trail 420, Harbour Lights 385, Old Maps 310, Winter Fair 295. Which two films differ by exactly 35 tickets?
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Convert between counts, fractions, and percentages of a stated total.
21. data-interpretation-s03-q01
A survey of 200 commuters found that 90 travel by train. What percentage travel by train?
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22. data-interpretation-s03-q02
A nursery's table shows 250 seedlings were planted and 20% failed to grow. How many seedlings survived?
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23. data-interpretation-s03-q03
A staffing table shows 60 of a company's 240 employees work part-time. What fraction of the workforce is that, in simplest form?
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24. data-interpretation-s03-q04
A results table shows votes for three candidates: Ade 4,500; Brooke 3,000; Chen 2,500. What percentage of all votes did Ade receive?
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25. data-interpretation-s03-q05
A transport chart shows how pupils travel to school: 35% by car, 25% by bus, 30% by bicycle, and the remainder walk. What percentage walk?
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26. data-interpretation-s03-q06
A till report shows a shop served 320 customers, of whom 40% paid by contactless card. How many customers is that?
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27. data-interpretation-s03-q07
A logistics dashboard shows that 45 of 150 orders were delivered late. What percentage of orders were late?
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28. data-interpretation-s03-q08
A survey table shows that 3 out of every 8 pupils chose science as their favourite subject. If 96 pupils were surveyed, how many chose science?
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29. data-interpretation-s03-q09
A museum's income table shows: grants 55%, ticket sales 30%, donations 15%. If total income was £600,000, how much came from ticket sales?
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30. data-interpretation-s03-q10
A festival report states that 40% of visitors bought a programme, and 5,200 programmes were sold, one per buyer. How many visitors attended in total?
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Read line-graph style series: rises, falls, peaks, and simple forecasts.
31. data-interpretation-s04-q01
Monthly website visits were: January 8,000; February 9,000; March 11,000; April 10,000; May 13,000. Between which two consecutive months was the largest rise?
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32. data-interpretation-s04-q02
Temperature readings through a day were: 06:00 4°C, 09:00 9°C, 12:00 14°C, 15:00 16°C, 18:00 12°C. At which time did the temperature peak?
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33. data-interpretation-s04-q03
A river-level graph shows: Monday 2.4 m, Tuesday 2.9 m, Wednesday 3.1 m, Thursday 2.8 m. On how many days did the level rise compared with the day before?
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34. data-interpretation-s04-q04
Annual subscriptions were: 2019: 1,200; 2020: 1,500; 2021: 1,800; 2022: 2,100. If the same yearly increase continues, what is the forecast for 2023?
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35. data-interpretation-s04-q05
Weekly sales fell from 640 in week 1 to 560 in week 2 and 480 in week 3. If the same weekly fall continues, what will week 4's sales be?
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36. data-interpretation-s04-q06
Quarterly profit was: Q1 £12,000; Q2 £15,000; Q3 £9,000; Q4 £18,000. Which quarter showed the largest change (up or down) from the previous quarter?
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37. data-interpretation-s04-q07
A graph shows a delivery firm's daily fuel use falling steadily from 900 litres on day 1 to 660 litres on day 5. Assuming a constant daily fall, how much did it fall per day?
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38. data-interpretation-s04-q08
A podcast's downloads doubled every month: March 500, April 1,000, May 2,000. If the pattern holds, how many downloads are expected in June?
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39. data-interpretation-s04-q09
A chart of annual conference attendance shows: 2018: 940; 2019: 980; 2020: 310; 2021: 890. Which year's figure most likely reflects a one-off disruption rather than the underlying trend?
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40. data-interpretation-s04-q10
Between 09:00 and 13:00 a car park's occupancy rose steadily from 40 cars to 200 cars. At that constant rate, how many cars were parked at 11:00?
Answer:
Work out means, medians, modes, and per-unit rates from small data sets.
41. data-interpretation-s05-q01
A results table lists five test scores: 62, 70, 58, 74, 66. What is the mean score?
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42. data-interpretation-s05-q02
A depot's table shows daily deliveries over four days: 45, 52, 38, 49. What is the mean number of deliveries per day?
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43. data-interpretation-s05-q03
A production log shows a machine fills 240 bottles in 30 minutes. At that rate, how many bottles does it fill per hour?
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44. data-interpretation-s05-q04
What is the median of this data set: 12, 18, 7, 25, 14?
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45. data-interpretation-s05-q05
A training log shows a cyclist covered 84 km in 3.5 hours. What was the average speed?
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46. data-interpretation-s05-q06
A call-centre dashboard shows a mean of 40 calls answered per hour across a 7-hour shift. How many calls were answered in total?
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47. data-interpretation-s05-q07
Rainfall over four weeks averaged 22 mm per week. The first three weeks measured 18 mm, 25 mm and 20 mm. How much rain fell in week 4?
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48. data-interpretation-s05-q08
A shoe shop's sales table lists the sizes sold in one hour: 6, 7, 7, 8, 8, 8, 9. What is the mode?
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49. data-interpretation-s05-q09
A specification table states a printer produces 45 pages per minute. How long will it take to print 630 pages?
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50. data-interpretation-s05-q10
A payroll table shows three staff earn £12 per hour and one earns £16 per hour. What is the mean hourly rate across the four staff?
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Convert between pie-chart angles, percentage shares, and actual amounts.
51. data-interpretation-s06-q01
A pie chart splits a £2,000 monthly budget: rent 50%, food 25%, travel 15%, other 10%. How much is spent on travel?
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52. data-interpretation-s06-q02
A pie chart is drawn accurately to scale. One segment measures 90°. What percentage of the whole does that segment represent?
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53. data-interpretation-s06-q03
A sports club has 360 members, shown on a pie chart. The badminton segment measures 120°. How many members play badminton?
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54. data-interpretation-s06-q04
A home-energy pie chart shows: gas 40%, electricity 35%, oil x%, renewables 5%. What is x?
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55. data-interpretation-s06-q05
A pie chart shows how 80 employees commute: half drive, a quarter cycle, and the rest is split equally between bus and walking. How many employees walk?
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56. data-interpretation-s06-q06
Two pie charts compare a shop's sales. In 2020, total sales were £40,000 with online at 30%. In 2023, total sales were £60,000 with online at 45%. By how much did online sales grow?
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57. data-interpretation-s06-q07
A pie chart shows 1,200 votes on a park name: Riverside 35%, Hillcrest 40%, Meadow 25%. How many votes did Hillcrest receive?
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58. data-interpretation-s06-q08
A pie chart represents 720 items in total. One category's segment measures 45°. How many items are in that category?
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59. data-interpretation-s06-q09
A dessert-orders pie chart shows: cake 30%, ice cream 25%, fruit 20%, pudding 25%. Which two categories together make up exactly half of all orders?
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60. data-interpretation-s06-q10
A charity's pie chart shows administration costs took 9% of the £150,000 it raised. How much was spent on administration?
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Combine two or more table values (prices, rates, and adjustments) in sequence.
61. data-interpretation-s07-q01
A price list shows: notebook £2.40, pen £1.10, folder £3.25. What is the cost of 3 notebooks and 2 pens?
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62. data-interpretation-s07-q02
A hotel's rate table shows: weeknight (Monday–Thursday) £85, weekend night (Friday–Sunday) £110. What does a guest pay for Thursday, Friday and Saturday nights?
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63. data-interpretation-s07-q03
A payroll table shows Amir worked 38 standard hours at £11 per hour plus 4 hours of overtime paid at time-and-a-half. What was his total pay?
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64. data-interpretation-s07-q04
A stock-movement table shows: opening stock 500, deliveries in 240, sales out 380, customer returns added back 15. What is the closing stock?
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65. data-interpretation-s07-q05
An electricity bill shows a standing charge of 28p per day for 30 days plus 210 kWh used at 24p per kWh. What is the total bill?
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66. data-interpretation-s07-q06
A fare table shows: adult return £14.50, child return £7.25. A family railcard gives 25% off adult fares only. What do 2 adults with the railcard and 2 children pay?
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67. data-interpretation-s07-q07
An exchange-rate table shows £1 = €1.15. A traveller exchanges £400 and later spends €322. How many euros remain?
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68. data-interpretation-s07-q08
A production table shows Line A makes 60 units per hour and ran for 6 hours; Line B makes 45 units per hour and ran for 8 hours. What was the combined output?
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69. data-interpretation-s07-q09
A menu prices a main at £8.95, a side at £3.05 and a drink at £1.80, or a meal deal with one of each for £12.50. How much does the meal deal save?
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70. data-interpretation-s07-q10
A van-hire tariff charges £45 per day plus 22p per mile. What does a two-day hire covering 250 miles cost?
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Calculate increases, decreases, reverse percentages, and index-linked values.
71. data-interpretation-s08-q01
A property table shows a house price rose from £180,000 to £198,000. What was the percentage increase?
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72. data-interpretation-s08-q02
A dashboard shows monthly active users fell from 25,000 to 21,250. What was the percentage fall?
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73. data-interpretation-s08-q03
A price index is set at 100 in 2020 and reads 130 in 2024. A basket of goods costing £46 in 2020 would cost how much in 2024, if it tracked the index exactly?
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74. data-interpretation-s08-q04
A chart shows sales grew by 20% in year one, then fell by 20% from that higher level in year two. Compared with the start, sales are now:
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75. data-interpretation-s08-q05
A table shows factory output rose from 8,000 units to 10,000 units. What is the increase as a percentage of the original output?
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76. data-interpretation-s08-q06
A ticket's price was cut by 30% in a sale and now costs £42. What was the original price?
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77. data-interpretation-s08-q07
An index table shows: 2021 = 100, 2022 = 110, 2023 = 121. What was the percentage change from 2022 to 2023?
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78. data-interpretation-s08-q08
A census table shows a town's population grew from 64,000 to 80,000. What was the percentage increase?
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79. data-interpretation-s08-q09
A dashboard reports revenue of £2.4 million, described as 'up 20% on last year'. What was last year's revenue?
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80. data-interpretation-s08-q10
An energy report shows annual use fell by 12% from 4,500 kWh. What is the new annual figure?
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Each item gives two linked tables or charts. Join them correctly to answer.
81. data-interpretation-s09-q01
Table 1 shows store visitors: Monday 400, Tuesday 500. Table 2 shows the share of visitors who bought something: Monday 10%, Tuesday 8%. Which day had more purchases?
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82. data-interpretation-s09-q02
Chart A shows 240 units were sold last month. Chart B shows the unit price was £12.50 throughout. What was the revenue?
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83. data-interpretation-s09-q03
A region table shows: North has 50,000 residents and 2,500 club members; South has 80,000 residents and 3,200 club members. Which region has the higher membership rate, and what is it?
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84. data-interpretation-s09-q04
A ferry timetable shows a 10:40 departure with a crossing time of 1 hour 35 minutes. A connections table says the shuttle bus leaves 20 minutes after the ferry arrives. When does the shuttle bus leave?
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85. data-interpretation-s09-q05
A project plan shows 180 hours of work are needed. A staffing table shows two team members are each available 30 hours per week. How many weeks will the work take?
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86. data-interpretation-s09-q06
Chart 1 shows a bakery bakes 320 loaves per day. Chart 2 shows that on average 5% of loaves go unsold. On an average day, how many loaves are sold?
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87. data-interpretation-s09-q07
Store A's price list shows a laptop at £600. Store B's advert says it sells the same laptop for 15% less than Store A. What is Store B's price?
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88. data-interpretation-s09-q08
A league table shows a team played 10 matches: 6 wins, 2 draws, 2 losses. The scoring table awards 3 points for a win, 1 for a draw, 0 for a loss. How many points does the team have?
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89. data-interpretation-s09-q09
A climate table shows a city receives 60 mm of rainfall in June. A gardening guide's table says the vegetable patch needs 90 mm per month, with any shortfall met by irrigation. How much irrigation is needed in June?
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90. data-interpretation-s09-q10
Survey A found 58% of its 1,000 respondents support a new cycle lane. Survey B found 62% of its 500 respondents support it. How many supporters were counted across both surveys?
Answer:
Judge what the data genuinely supports, and spot misleading presentations.
91. data-interpretation-s10-q01
A table shows Company X's profits rose every year from 2021 to 2024 while its workforce shrank each year. Which conclusion does the data alone support?
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92. data-interpretation-s10-q02
A safety chart shows that 12% of e-scooter riders wear helmets, and that scooter injuries doubled last year. Which conclusion can be drawn from the data alone?
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93. data-interpretation-s10-q03
A poster claims '80% of adults exercise three or more times a week', citing a survey of 300 gym members. What is the main flaw in generalising this figure to all adults?
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94. data-interpretation-s10-q04
A trial table shows: treatment group of 400 people, 60 recovered within a week; placebo group of 100 people, 10 recovered within a week. Which statement is accurate?
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95. data-interpretation-s10-q05
A chart shows a town's average house price rose 8% last year. A columnist writes: 'Every house in the town is now worth 8% more.' How should this claim be judged against the data?
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96. data-interpretation-s10-q06
A chart shows that ice-cream sales and swimming-related rescues both peak sharply in July. Which explanation is best supported?
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97. data-interpretation-s10-q07
A bar chart's vertical axis starts at 90 rather than 0. Brand A's satisfaction bar reaches 94 and Brand B's reaches 98, so Brand B's bar looks twice as tall. Which reading is fair?
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98. data-interpretation-s10-q08
A punctuality table shows 91% of 20,000 weekday services ran on time, and 95% of 2,000 weekend services. A press release claims overall punctuality of 93%. How should the claim be judged?
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99. data-interpretation-s10-q09
A study table shows that participants who slept 7–8 hours scored higher on a test than those who slept under 6 hours. What can be concluded from this data alone?
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100. data-interpretation-s10-q10
A dashboard shows product returns fell from 8% to 6% of orders after a packaging redesign; no other information is given. Which is the strongest statement the data supports?
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