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Primary 4 Mathematics Data Analysis Quiz
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Primary 4 Mathematics Quiz - Data Analysis (Answer Key)
Total Marks: 40
Teaching notes included for each question.
Section A (1 mark each)
1. Answer: 11
Teaching: Look at the Books column. The values are 8, 5, 11, 6. The largest is 11 (Chen). The student who read most read 11 books.
2. Answer: Music
Teaching: Compare the numbers: Art 12, Music 9, Sports 15. The smallest is 9, which is Music. Fewest means smallest count.
3. Answer: 31
Teaching: Read from the line graph description: at 12pm the temperature is 31°C. Directly read the given point.
4. Answer: 1/4
Teaching: A pie chart split into 4 equal parts means each part is one out of four, so fraction = 1/4.
5. Answer: 5 kg
Teaching: The masses are 2, 3, 4, 3, 5 kg. The heaviest (largest) is 5 kg.
6. Answer: 7
Teaching: Tally |||| is 4, plus || is 2, total 4+2=6? Wait: |||| = 4, || = 2, so 4+2 = 6. Actually the prompt wrote "|||| ||" which is 4 + 2 = 6. Correction: Answer is 6. (Common mistake: miscounting groups of 5; here no group of 5, just 6 marks.)
Correct Answer: 6
7. Answer: 5
Teaching: Total children = 20. Apple 8, Orange 7, so used = 15. Rest = 20 - 15 = 5 chose banana.
8. Answer: 5 cm
Teaching: Day 3 height 9cm, Day 1 height 4cm. Growth = 9 - 4 = 5 cm.
9. Answer: 16
Teaching: Bars heights 5 + 8 + 3 = 16. Total means sum of all bars.
10. Answer: 1/4
Teaching: Whole pie = 1. Red 1/2, Blue 1/4, used = 3/4. Green = 1 - 3/4 = 1/4.
Section B (2 marks each)
11. (a) Ravi (b) 48
Teaching:
(a) Totals: Ravi 14+18=32, Siti 12+20=32, Tim 16+10=26. Ravi and Siti tie at 32, but Tim less. Actually both Ravi and Siti collected 32. The question asks "who collected the most" – both Ravi and Siti. Accept "Ravi and Siti" or "Ravi/Siti".
(b) Week 2 total = 18+20+10 = 48.
Marking: (a) 1 mark for correct name(s), (b) 1 mark for 48.
12. (a) Thursday (b) 15
Teaching: From placeholder values: Mon 25, Tue 30, Wed 20, Thu 35.
(a) Most = Thu (35).
(b) Difference Thu - Wed = 35 - 20 = 15.
Marking: 1 mark each.
13. (a) Day 1 (b) 18 mm
Teaching: Rainfall: D1 2, D2 5, D3 3, D4 8.
(a) Least = 2mm on Day 1.
(b) Total = 2+5+3+8 = 18 mm.
Marking: 1m each.
14. (a) 5/12 (b) 8
Teaching: Whole = 1. Football 1/4, Swimming 1/3. Common denom 12: 1/4=3/12, 1/3=4/12, sum=7/12. Cycling = 5/12.
(b) Swimming pupils = 1/3 of 24 = 24 ÷ 3 = 8.
Marking: (a) 1m for 5/12, (b) 1m for 8.
15. (a) 15 (b) 7 min
Teaching: Times: 10,15,12,15,8.
(a) Mode = most frequent = 15 (appears twice).
(b) Range = max - min = 15 - 8 = 7 min.
Marking: 1m each.
16. (a) 5 (b) 6
Teaching: Tally: Dogs |||| ||| = 4+3=7; Cats |||| = 4+1=5; Birds || = 2.
(a) Cats = 5.
(b) Dogs - Birds = 7 - 2 = 5? Wait 7-2=5. But earlier I wrote 6. Correction: 7-2=5.
Correct Answer: (a) 5 (b) 5.
Marking: 1m each.
Section C (3 marks each)
17. (a) Thursday (b) 36 (c) 8
Teaching: From graph values: Mon10, Tue14, Wed12, Thu20, Fri18.
(a) Most = Thu (20). [1m]
(b) Mon+Wed = 10+14+12 = 36. [1m]
(c) Thu - Wed = 20 - 12 = 8. [1m]
18. (a) Apple (b) 2/5 (c) 9
Teaching: Table: Apple12, Orange9, Pear6, Banana3, total30.
(a) Largest count = Apple. [1m]
(b) Fraction Apple = 12/30 = simplify divide by 6 → 2/5. [1m]
(c) 12 - 3 = 9. [1m]
19. (a) 20 (b) 10 (c) 30
Teaching: Total 40. Bus 1/2 → 20. MRT 1/4 → 10. Walk 1/4 → 10.
(a) Bus = 20. [1m]
(b) Walk = 10. [1m]
(c) Bus+MRT = 20+10 = 30. [1m]
20. (a) 19 (b) Team B (c) 5
Teaching: Totals: A 5+8+7=20, B 6+6+9=21, C 4+10+5=19, D 7+7+8=22.
(a) Team C = 19. [1m]
(b) Highest = D (22). Wait D=22, B=21, A=20, C=19. So highest is Team D. Correction: (b) Team D.
(c) Lowest = C (19), Highest = D (22), diff = 3. Correction: diff = 3.
Correct Answers: (a) 19 (b) Team D (c) 3.
Marking: 1m each.

