CambridgeEssentials Mathematics Core9 N3.2 Answers
/ N3.2Answers1a2 : 5b3 : 4c3 : 5d13 : 1
e14 : 2f1 : 2g7 : 3h3 : 4
2a2 : 3b7 : 13c17 : 8d 0 : 1
3a2 blue: 3 green : 4 pink : 5 yellow : 6 white
b blue, green, pink, yellow, white
c10% blue, 15% green, 20% pink, 25% yellow, 30% white
d8 pink, 12 green, 16 pink, 20 yellow, 24 white
4
Proportion / / / /Ratio / 7 : 5 / 1 : 7 / 17 : 46 / 5 : 6
5a4 : 5b1 : 3c1 : 3d4 : 7
e1 : 5f5 : 4g1 : 2h5 : 1
i8 : 9j3 : 4k31 : 33l99 : 100
m1 : 2 : 9n1 : 4 : 7o3 : 4 : 6p11 : 6 : 15
q1 : 2r1 : 12s3 : 4t1 : 18
6a9b224c16d24e3
f300g8, 10h40, 65i3, 32j12
7abc74%d18.8%e79.28%
8a or 40%b12 : 5c53.3%d4 : 11
9a12 : 6b9 : 15c18 : 12d15 : 20
e30 : 18f45 : 20g20 : 30 : 50h20 : 40 : 100
10Jo got £90 and Melissa got £60.
11Loam 140 kg, peat 60 kg, sand 40 kg
1230°, 60° and 90 °
13 Parson’s Green Road is 22.5 miles, Torbay Road is 18.5 miles, Century Road is 28 miles, Market Road is 4 miles.
14a1200 mb6.1 cm
15a3.5 mb12.25 m2
1648 m
17a600 gb250 g
184 cups of flour, 3 tsp baking powder, 1 cup milk
19a6 bananas, 225 g walnuts, 300 g flour, 1 teaspoons of cinnamon
b12 bananas, 600 g flour, 3 teaspoons of cinnamon
20a6 litresb36 onions
21a1 : 2b1 : 4c1 : 2.33d1 : 4.2e1 : 9.5
22aThe grey pair has woolto other materials in the ratio of 1 : 0.40 and the black pair in
the ratio of 1: 0.44
bThe grey pair has the higher proportion of blue.
23aThe first paint is mixed in the ratio 3 : 5 and the second is mixed in the ratio 9 : 14
bThe first paint is mixed in the ratio 1 : 1.7 (1 d.p.) and the second 1 : 1.6 (1 d.p.), so the first has a higher proportion of blue.
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