Primary 4 Mathematics Data Analysis Quiz

Answer Key: Primary 4 Mathematics Quiz - Data Analysis

Total Marks: 20

Section A: Reading Tables and Bar Graphs (Questions 1 to 5)

Each question carries 1 mark.

Question 1

• Answer: 52
• Marks: 1
• Explanation: The table shows that on Wednesday, the number of books borrowed is 52. This is a direct reading from the table. Look at the row for "Wednesday" and the column for "Number of Books Borrowed".

Question 2

• Answer: 60
• Marks: 1
• Explanation: The bar for Tuesday is 6 units high. Each unit represents 10 ice creams. So, the number of ice creams sold on Tuesday is 6 × 10 = 60. This is a direct reading from the bar graph, but you must multiply by the scale.

Question 3

• Answer: 86
• Marks: 1
• Explanation: From the table in Question 1, Monday had 45 books and Thursday had 41 books. The total is 45 + 41 = 86. This requires adding two values from the table.

Question 4

• Answer: 25
• Marks: 1
• Explanation: The pictograph shows 5 apples for Wednesday. Each apple symbol represents 5 apples. So, the number of apples sold on Wednesday is 5 × 5 = 25. This is a direct reading from the pictograph, but you must multiply by the key.

Question 5

• Answer: 5
• Marks: 1
• Explanation: From the pictograph in Question 4, Monday has 4 apples (4 × 5 = 20 apples) and Tuesday has 3 apples (3 × 5 = 15 apples). The difference is 20 - 15 = 5. This requires comparing two values from the pictograph.

Section B: Interpreting Data and Line Graphs (Questions 6 to 10)

Each question carries 1 mark.

Question 6

• Answer: 28
• Marks: 1
• Explanation: The line graph shows a point at 10 a.m. on the x-axis. The corresponding value on the y-axis (Temperature) is 28°C. This is a direct reading from the line graph.

Question 7

• Answer: Between 9 a.m. and 10 a.m.
• Marks: 1
• Explanation: Calculate the temperature increase between each pair of hours:
  • 8 a.m. to 9 a.m.: 26 - 25 = 1°C
  • 9 a.m. to 10 a.m.: 28 - 26 = 2°C
  • 10 a.m. to 11 a.m.: 29 - 28 = 1°C
  • 11 a.m. to 12 p.m.: 30 - 29 = 1°C The largest increase is 2°C, which occurred between 9 a.m. and 10 a.m.

Question 8

• Answer: 20
• Marks: 1
• Explanation: The number of students who chose Banana is 10. The number of students who chose Grape is 10. The total is 10 + 10 = 20. This requires adding two values from the table.

Question 9

• Answer: 3/10
• Marks: 1
• Explanation: The total number of students is 40. The number of students who chose Apple is 12. The fraction is 12/40. Simplify by dividing the numerator and denominator by 4: 12 ÷ 4 = 3, 40 ÷ 4 = 10. So, the fraction is 3/10.

Question 10

• Answer: Wednesday
• Marks: 1
• Explanation: Look down the "Number of Visitors" column in the table. The value 110 is in the row for Wednesday. This is a direct reading from the table.

Section C: Solving Problems with Data (Questions 11 to 15)

Each question carries 2 marks.

Question 11

• Answer: 90
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: First, find the points for each player from the bar graph:
  • Ali: 4 units × 5 points/unit = 20 points
  • Bala: 6 units × 5 points/unit = 30 points
  • Chong: 5 units × 5 points/unit = 25 points
  • Dewi: 3 units × 5 points/unit = 15 points Total points = 20 + 30 + 25 + 15 = 90 points.

Question 12

• Answer: 15
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: "At least 1 pet" means 1 pet or more. So, we add the number of children who have 1, 2, or 3 pets. 8 + 4 + 3 = 15 children. Do not include the 5 children who have 0 pets.

Question 13

• Answer: 8
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: From the line graph, the height at Week 2 is 6 cm. The height at Week 4 is 14 cm. The growth is 14 - 6 = 8 cm.

Question 14

• Answer: 6
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: The number of people who chose Blue is 12. The number of people who chose Green is 6. The difference is 12 - 6 = 6.

Question 15

• Answer: 30
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: At 11 a.m., there were 50 cars. At 9 a.m., there were 20 cars. The difference is 50 - 20 = 30 cars.

Section D: More Problem Solving with Data (Questions 16 to 20)

Each question carries 2 marks.

Question 16

• Answer: 6
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: From the bar graph:
  • Soccer: 7 units × 2 students/unit = 14 students
  • Swimming: 4 units × 2 students/unit = 8 students Difference = 14 - 8 = 6 students.

Question 17

• Answer: 210
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: Total cans = 55 + 40 + 65 + 50 = 210 cans.

Question 18

• Answer: 80
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: The line graph shows a point at 0 hours on the x-axis. The corresponding value on the y-axis (Amount of Water) is 80 litres.

Question 19

• Answer: 8
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: The number of students who travel by bus is 15. The number of students who travel by bicycle is 7. The difference is 15 - 7 = 8.

Question 20

• Answer: 12
• Marks: 2 (1 mark for correct method, 1 mark for correct answer)
• Explanation: The pictograph shows 6 books for Clara. Each book symbol represents 2 books. So, the number of books Clara read is 6 × 2 = 12.

End of Answer Key