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Primary 4 Mathematics · Chapter 4 · Answers and explanations

Chapter 4 Revision Paper: Tables and Line Graphs (answers)

Section A · Multiple choice 10 marks

1. How many chocolate cupcakes were sold?1 mark

Cupcakes Sold at a Bake Sale0102030405060VanillaChocolateLemonMintBerryNumber of cupcakes
(A) 50(B) 60(C) 40(D) 6
Answer: (B) 60Find the Chocolate bar. Its top is on the line for 60, so 60 cupcakes were sold. (50 is Berry and 40 is Vanilla.)

2. Which flavour of cupcake was sold the least?1 mark

Cupcakes Sold at a Bake Sale0102030405060VanillaChocolateLemonMintBerryNumber of cupcakes
(A) Mint(B) Vanilla(C) Lemon(D) Berry
Answer: (C) LemonThe shortest bar is Lemon. Its top is at 20, the smallest number.

3. How many cold drinks were sold on Tuesday?1 mark

Drinks Sold at a School CanteenHotCold0510152025303540MonTueWedThuNumber of drinks
(A) 20(B) 35(C) 25(D) 15
Answer: (D) 15On Tue, the Cold bar (orange) reaches 15. (20 is the Hot bar.)

4. How many drinks were sold on Monday in all?1 mark

Drinks Sold at a School CanteenHotCold0510152025303540MonTueWedThuNumber of drinks
(A) 45(B) 30(C) 15(D) 20
Answer: (A) 45Monday: 15 hot and 30 cold. 15 + 30 = 45. (30 and 15 each leave out one bar.)

5. How many pupils chose Music in all?1 mark

Favourite SubjectSubjectPrimary 3Primary 4Art1422Music1816Science2025
(A) 18(B) 34(C) 16(D) 2
Answer: (B) 34Music row: 18 in Primary 3 and 16 in Primary 4. 18 + 16 = 34. (2 is the difference.)

6. What was the mass of the puppy in Month 3?1 mark

Mass of a Puppy04812162024Month 1Month 2Month 3Month 4Month 5Month 6Mass (kg)
(A) 12 kg(B) 16 kg(C) 14 kg(D) 10 kg
Answer: (C) 14 kgThe Month 3 point is halfway between the lines for 12 and 16. Halfway is 14 kg.

7. In which month was the puppy 22 kg?1 mark

Mass of a Puppy04812162024Month 1Month 2Month 3Month 4Month 5Month 6Mass (kg)
(A) Month 4(B) Month 6(C) Month 3(D) Month 5
Answer: (D) Month 5Find 22 kg, halfway between 20 and 24. The point at that height is above Month 5.

8. How many cars were in the car park at 11 am?1 mark

Cars in a Car Park0204060801008 am9 am10 am11 am12 pm1 pmNumber of cars
(A) 60(B) 40(C) 80(D) 50
Answer: (A) 60The 11 am point is on the line for 60, so there were 60 cars.

9. Mina plots a point for 35 on a line graph. The scale goes up in tens (0, 10, 20, 30, 40, ...). Where should she put the point?1 mark

(A) On the line for 30(B) Halfway between the lines for 30 and 40(C) On the line for 40(D) Halfway between the lines for 20 and 30
Answer: (B) Halfway between the lines for 30 and 4035 is 5 more than 30 and 5 less than 40, so it is halfway between the lines for 30 and 40.

10. Which one is best shown by a line graph?1 mark

(A) The number of pupils in four classes(B) The favourite colours of 20 children(C) The mass of a baby each month for one year(D) The number of books on five shelves
Answer: (C) The mass of a baby each month for one yearA line graph shows how something changes over time. The other three only compare separate groups, so a bar graph or table suits them better.

Section B · Short answers 4 marks

11. How many cupcakes were sold in all?1 mark

Cupcakes Sold at a Bake Sale0102030405060VanillaChocolateLemonMintBerryNumber of cupcakes
Answer: 20040 + 60 + 20 + 30 + 50 = 200 cupcakes.

12. How many more cold drinks than hot drinks were sold on Thursday?1 mark

Drinks Sold at a School CanteenHotCold0510152025303540MonTueWedThuNumber of drinks
Answer: 30Thursday: cold 35, hot 5. 35 − 5 = 30 more cold drinks.

13. Find the missing number for Mei in July.1 mark

Books Read in Three MonthsPupilJunJulAugTotalKen1215936Mei8181440Sam1610733
Answer: 18Mei read 40 books in all. 40 − 8 − 14 = 18. So Mei read 18 books in July.

14. By how many kilograms did the puppy's mass increase from Month 4 to Month 5?1 mark

Mass of a Puppy04812162024Month 1Month 2Month 3Month 4Month 5Month 6Mass (kg)
Answer: 6 kgMonth 4: 16 kg. Month 5: 22 kg. 22 − 16 = 6 kg.

Section C · Show your working 16 marks

15. How many more cupcakes were Chocolate and Berry together than Lemon and Mint together?2 marks

Cupcakes Sold at a Bake Sale0102030405060VanillaChocolateLemonMintBerryNumber of cupcakes
Answer: 60Chocolate and Berry: 60 + 50 = 110. Lemon and Mint: 20 + 30 = 50. 110 − 50 = 60 more cupcakes.

16. On which two days did the canteen sell the same number of drinks in all? How many drinks was that each day?2 marks

Drinks Sold at a School CanteenHotCold0510152025303540MonTueWedThuNumber of drinks
Answer: Tuesday and Wednesday, 35 drinks eachMon: 15 + 30 = 45. Tue: 20 + 15 = 35. Wed: 25 + 10 = 35. Thu: 5 + 35 = 40. Tuesday and Wednesday both have 35 drinks.

17. How many more books did the three pupils read in July than in June?2 marks

Books Read in Three MonthsPupilJunJulAugTotalKen1215936Mei8181440Sam1610733
Answer: 7First find the missing numbers. Mei in July: 40 − 8 − 14 = 18. June: 12 + 8 + 16 = 36. July: 15 + 18 + 10 = 43. 43 − 36 = 7 more books.

18. Between which two months did the puppy's mass increase the most? By how many kilograms?2 marks

Mass of a Puppy04812162024Month 1Month 2Month 3Month 4Month 5Month 6Mass (kg)
Answer: Month 4 and Month 5, 6 kgIncreases: Month 1 to 2: 4, Month 2 to 3: 4, Month 3 to 4: 2, Month 4 to 5: 22 − 16 = 6, Month 5 to 6: 2. The greatest is 6 kg, from Month 4 to Month 5.

19. Between which two times did the number of cars decrease the most? By how many cars?2 marks

Cars in a Car Park0204060801008 am9 am10 am11 am12 pm1 pmNumber of cars
Answer: 11 am and 12 pm, 40 carsThe line goes down from 10 am to 11 am (80 to 60, which is 20) and from 11 am to 12 pm (60 to 20, which is 40). The greatest decrease is 40 cars, from 11 am to 12 pm.

20. Each cupcake was sold for $2. The stall spent $120 on ingredients. How much money did the stall have left after paying for the ingredients?2 marks

Cupcakes Sold at a Bake Sale0102030405060VanillaChocolateLemonMintBerryNumber of cupcakes
Answer: $280Cupcakes sold: 40 + 60 + 20 + 30 + 50 = 200. Money collected: 200 × $2 = $400. $400 − $120 = $280.

21. How many more cars were in the car park at 9 am and 10 am together than at 12 pm and 1 pm together?2 marks

Cars in a Car Park0204060801008 am9 am10 am11 am12 pm1 pmNumber of cars
Answer: 809 am and 10 am: 70 + 80 = 150. 12 pm and 1 pm: 20 + 50 = 70. 150 − 70 = 80 more cars.

22. On Friday, the canteen sold twice as many hot drinks as on Thursday. The total number of drinks sold on Friday was the same as on Monday. How many cold drinks were sold on Friday?2 marks

Drinks Sold at a School CanteenHotCold0510152025303540MonTueWedThuNumber of drinks
Answer: 35Thursday hot drinks: 5, so Friday hot drinks: 5 × 2 = 10. Monday total: 15 + 30 = 45, so Friday total is 45. Cold drinks: 45 − 10 = 35.
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