1. Any 4 train cars could have been circled. (1 mark)
2. Any 16 trees could have been circled. (1 mark)
3. Any 10 flowers could have been circled. (1 mark)
4. a. The drawing must show a multiple of 3 triangles with the proportional number of triangles circled (e.g., a set of 3 triangles with 2 triangles circled, a set of 6 triangles with 4 triangles circled, a set of 9 triangles with 6 triangles circled, …). (1 mark)
b. The sets of hearts and stars must show different multiples of 4 with the proportional number of objects circled (e.g., a set of 4 objects with 1 object circled, a set of 8 objects with 2 objects circled, a set of 12 objects with 3 objects circled, …). (1 mark)
c. The set of happy faces must be a multiple of 6 with the proportional number of happy faces coloured (e.g., a set of 6 happy faces with 3 of them red and 2 of them blue, a set of 12 happy faces with 6 of them red and 4 of them blue, …). (1 mark)
d. The set of stars must be a multiple of 6 with the proportional number of stars coloured (e.g., a set of 6 stars with 4 stars coloured red and 1 star coloured green, a set of 12 stars with 8 stars coloured red and 2 stars coloured green, …). (1 mark)
5. Textbook, page 98, Starting Out, questions 2.a., 2.b., 2.d., and 2.f
2. a. True. There are 18 students altogether, and 10 of them are girls, so
are girls.
b. False. Only 6 of the 18 students do not have solid colour shirts, so 12 have solid shirts.
.
d. False. Only 3 of the students are wearing striped shirts, so 15 of the 18 are not wearing striped shirts.
f. False. Only
, which is slightly fewer than
of them, are standing.
(4 marks)
6. Textbook, page 103, Practise Your Skills, questions 1 and 2
1. a. 3 circles
b. 5 squares
c. 12 triangles2. a. 1 flower
b. 3 trees
c. 6 cats
(6 marks)
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