Primary 2 Mathematics Picture Graphs Quiz

Answer Key: Primary 2 Mathematics Quiz - Picture Graphs

Total Marks: 40

Section A: Reading Picture Graphs (Questions 1 to 5)

Graph Summary: The picture graph shows the favourite fruits of Class 2A. Each fruit symbol represents 2 children.

• Apple: 4 symbols → 4 × 2 = 8 children
• Banana: 3 symbols → 3 × 2 = 6 children
• Cherry: 5 symbols → 5 × 2 = 10 children
• Durian: 2 symbols → 2 × 2 = 4 children

1. How many children chose Apple as their favourite fruit? [1]

• Answer: 8 children
• Explanation: The Apple row has 4 symbols. Each symbol represents 2 children. So, 4 × 2 = 8 children chose Apple.
• Common mistake: Counting the symbols (4) instead of multiplying by the scale (2).

2. Which fruit was chosen by 6 children? [1]

• Answer: Banana
• Explanation: 6 children ÷ 2 children per symbol = 3 symbols. The Banana row has 3 symbols, so Banana was chosen by 6 children.
• Teaching note: To find the number of symbols, divide the number of children by the scale (2).

3. How many more children chose Cherry than Durian? [2]

• Answer: 6 more children
• Explanation:
  • Cherry: 5 symbols × 2 = 10 children
  • Durian: 2 symbols × 2 = 4 children
  • Difference: 10 - 4 = 6 children
• Marking: 1 mark for correct method (finding both totals), 1 mark for correct answer.

4. How many children chose Banana and Durian altogether? [2]

• Answer: 10 children
• Explanation:
  • Banana: 3 symbols × 2 = 6 children
  • Durian: 2 symbols × 2 = 4 children
  • Total: 6 + 4 = 10 children
• Marking: 1 mark for correct method, 1 mark for correct answer.

5. What is the total number of children in Class 2A who voted? [2]

• Answer: 28 children
• Explanation:
  • Total symbols: 4 + 3 + 5 + 2 = 14 symbols
  • Total children: 14 × 2 = 28 children
  • Or add all totals: 8 + 6 + 10 + 4 = 28 children
• Marking: 1 mark for correct method, 1 mark for correct answer.

Section B: Interpreting Scaled Picture Graphs (Questions 6 to 10)

Graph Summary: The picture graph shows books read in a week. Each book symbol represents 4 books.

• Monday: 3 symbols → 3 × 4 = 12 books
• Tuesday: 2 symbols → 2 × 4 = 8 books
• Wednesday: 4 symbols → 4 × 4 = 16 books
• Thursday: 1 symbol → 1 × 4 = 4 books
• Friday: 5 symbols → 5 × 4 = 20 books

6. How many books were read on Wednesday? [1]

• Answer: 16 books
• Explanation: The Wednesday row has 4 symbols. Each symbol represents 4 books. So, 4 × 4 = 16 books.

7. On which day were 8 books read? [1]

• Answer: Tuesday
• Explanation: 8 books ÷ 4 books per symbol = 2 symbols. The Tuesday row has 2 symbols.

8. How many more books were read on Friday than on Thursday? [2]

• Answer: 16 more books
• Explanation:
  • Friday: 5 symbols × 4 = 20 books
  • Thursday: 1 symbol × 4 = 4 books
  • Difference: 20 - 4 = 16 books
• Marking: 1 mark for correct method, 1 mark for correct answer.

9. How many books were read on Monday and Tuesday altogether? [2]

• Answer: 20 books
• Explanation:
  • Monday: 3 symbols × 4 = 12 books
  • Tuesday: 2 symbols × 4 = 8 books
  • Total: 12 + 8 = 20 books
• Marking: 1 mark for correct method, 1 mark for correct answer.

10. What is the total number of books read from Monday to Friday? [2]

• Answer: 60 books
• Explanation:
  • Total symbols: 3 + 2 + 4 + 1 + 5 = 15 symbols
  • Total books: 15 × 4 = 60 books
  • Or add all totals: 12 + 8 + 16 + 4 + 20 = 60 books
• Marking: 1 mark for correct method, 1 mark for correct answer.

Section C: Drawing and Completing Picture Graphs (Questions 11 to 15)

Table Data:

• Vanilla: 20 cones
• Chocolate: 12 cones
• Strawberry: 8 cones
• Mint: 16 cones

Scale: Each symbol = 4 cones

11. Draw the correct number of symbols in the picture graph below. [2]

• Answer:
  • Chocolate: 12 cones ÷ 4 = 3 symbols
  • Strawberry: 8 cones ÷ 4 = 2 symbols
  • Mint: 16 cones ÷ 4 = 4 symbols
• Marking: 1 mark for drawing the correct number of symbols for Chocolate and Strawberry, 1 mark for drawing the correct number of symbols for Mint. Accept any clear symbol (e.g., a circle or a cone drawing).
• Common mistake: Drawing the number of cones instead of the number of symbols.

12. How many cones of Vanilla were sold? [1]

• Answer: 20 cones
• Explanation: The table shows 20 cones of Vanilla were sold.

13. Which flavour had the least number of cones sold? [1]

• Answer: Strawberry
• Explanation: Strawberry has 8 cones, which is the smallest number in the table.

14. How many more cones of Mint were sold than Strawberry? [2]

• Answer: 8 more cones
• Explanation:
  • Mint: 16 cones
  • Strawberry: 8 cones
  • Difference: 16 - 8 = 8 cones
• Marking: 1 mark for correct method, 1 mark for correct answer.

15. How many cones of Vanilla and Chocolate were sold altogether? [2]

• Answer: 32 cones
• Explanation:
  • Vanilla: 20 cones
  • Chocolate: 12 cones
  • Total: 20 + 12 = 32 cones
• Marking: 1 mark for correct method, 1 mark for correct answer.

Section D: Problem Solving with Picture Graphs (Questions 16 to 20)

Graph Summary: The picture graph shows pets owned by children. Each paw symbol represents 2 children.

• Dog: 6 symbols → 6 × 2 = 12 children
• Cat: 4 symbols → 4 × 2 = 8 children
• Fish: 3 symbols → 3 × 2 = 6 children
• Hamster: 5 symbols → 5 × 2 = 10 children

16. How many children own a Cat? [1]

• Answer: 8 children
• Explanation: The Cat row has 4 symbols. Each symbol represents 2 children. So, 4 × 2 = 8 children.

17. How many more children own a Dog than a Fish? [2]

• Answer: 6 more children
• Explanation:
  • Dog: 6 symbols × 2 = 12 children
  • Fish: 3 symbols × 2 = 6 children
  • Difference: 12 - 6 = 6 children
• Marking: 1 mark for correct method, 1 mark for correct answer.

18. Which two pets have a total of 16 children owning them? [2]

• Answer: Dog and Hamster
• Explanation:
  • Dog: 12 children
  • Hamster: 10 children
  • Total: 12 + 10 = 22 children (not 16)
  • Try other combinations:
    • Cat (8) + Hamster (10) = 18 children (not 16)
    • Dog (12) + Cat (8) = 20 children (not 16)
    • Dog (12) + Fish (6) = 18 children (not 16)
    • Cat (8) + Fish (6) = 14 children (not 16)
    • Hamster (10) + Fish (6) = 16 children (correct!)
  • So, Hamster and Fish have a total of 16 children.
• Marking: 1 mark for identifying the correct pair, 1 mark for showing the total. Accept "Hamster and Fish" or "Fish and Hamster".
• Teaching note: This question requires trial and error or systematic checking of different pairs.

19. 4 children who own a Hamster moved away. How many children now own a Hamster? [2]

• Answer: 6 children
• Explanation:
  • Originally: 10 children owned a Hamster
  • 4 children moved away: 10 - 4 = 6 children
• Marking: 1 mark for correct method, 1 mark for correct answer.

20. The children who own a Dog and a Cat are going to the park. How many children are going to the park? [2]

• Answer: 20 children
• Explanation:
  • Dog owners: 12 children
  • Cat owners: 8 children
  • Total: 12 + 8 = 20 children
• Marking: 1 mark for correct method, 1 mark for correct answer.

End of Answer Key