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Primary 4 Mathematics · Chapter 11 · Answers and explanations

Lesson 11.2: Pie Charts (answers)

Section A · Multiple choice 4 marks

1. Which pie chart shows the correct information?1 mark

Favourite colours of 100 pupilsColourRedBlueGreenYellowNumber of pupils40302010ARedBlueGreenYellowBRedBlueGreenYellowCRedBlueGreenYellow
(A) Pie chart A(B) Pie chart B(C) Pie chart C(D) None of them
Answer: (C) Pie chart CRed is 40, the biggest slice. Blue is 30, Green is 20 and Yellow is 10, the smallest. Only pie chart C matches.

2. How many pupils walk to school?1 mark

How 60 Pupils Travel to SchoolBus21MRT18Car12Walk
(A) 9(B) 51(C) 21(D) 12
Answer: (A) 9The whole is 60. 21 + 18 + 12 = 51. Walk = 60 − 51 = 9.

3. What fraction of the pupils like cats?1 mark

Favourite Pets of 48 PupilsDog18Cat12Hamster6Rabbit12
(A) 13(B) 14(C) 12(D) 16
Answer: (B) 14Cats: 12 out of 48, which is 1248. Divide the top and bottom by 12 to get 14.

4. There are 80 toys. How many toys are blocks?1 mark

Toys in a Toy Box (80 toys)Blocks38Cars14Dolls18Balls
(A) 50(B) 10(C) 30(D) 24
Answer: (C) 30Blocks are 38 of 80. 1 eighth of 80 is 80 ÷ 8 = 10. So 38 is 3 × 10 = 30.

Section B · Write your answer 11 marks

5. Which pet is liked by the fewest pupils?1 mark

Favourite Pets of 48 PupilsDog18Cat12Hamster6Rabbit12
Answer: HamsterThe smallest number is 6, which is Hamster.

6. How many more pupils like dogs than hamsters?1 mark

Answer: 1218 − 6 = 12 more pupils.

7. What fraction of the pupils like dogs? Give your answer in the simplest form.2 marks

Answer: 38Dogs: 18 out of 48, which is 1848. Divide the top and bottom by 6 to get 38.

8. What fraction of the toys are balls?1 mark

Toys in a Toy Box (80 toys)Blocks38Cars14Dolls18Balls
Answer: 14Balls = 1 whole − 38 − 14 − 18. In eighths: 88 − 38 − 28 − 18 = 28 = 14.

9. How many dolls are there?1 mark

Answer: 10Dolls are 18 of 80. 80 ÷ 8 = 10 dolls.

10. How many more cars than dolls are there?2 marks

Answer: 10Cars are 14 of 80 = 20. Dolls = 10. 20 − 10 = 10 more cars.

11. What fraction of the pupils take the bus? Give your answer in the simplest form.2 marks

How 60 Pupils Travel to SchoolBus21MRT18Car12Walk
Answer: 720Bus: 21 out of 60, which is 2160. Divide the top and bottom by 3 to get 720.

12. How many pupils take the MRT or a car?1 mark

Answer: 3018 + 12 = 30 pupils.
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