Cambridge International Mathematics

684 ANSWERS

Review set 10B

1a$720 000

bAdmin. 72 o, Production 100 o, Marketing 90 o,

Distribution 60 o, Advert. 38 o

c

2a Animal numbers data b10%

c Cows, Goats,

Sheep

3a School drama participants b 2006

4a 5 j 1 means 51 kg b 28 kg c 65 kg d 54 kg

5a

bRoses and Carnations c Roses and Carnations

dLilies as he makes least profit (only$ 6000 ).

6a Weights of men data

Before After

688

9 7 4899

632 8 33459

98753 9 235699

4410 10 2667

97411 11 03

53210 12 25

52 13 Key: 10 j 2 means 102 kg

bYes, the ‘After’ weights are significantly less than the

‘Before’ weights as a group.

Review set 16A

1

2aA line graph.

b

ciDay 10 iiDay 1

3 Weights of new-born babies

Stem Leaf

238

3 13456899

4 00124

51 Key: 5 j 1 means 5 : 1 kg

4a

b Evan, as his data is more closely grouped. c Rhys

5a

b Women own more pets.

6

EXERCISE 6A.1

1a 8 b 27 c 32 d 125 e 540

f 1176 g 2925 h 4400

2a50 = 2£ 52 b 98 = 2£ 72 c 108 = 2^2 £ 33

d 360 = 2^3 £ 32 £ 5 e 1128 = 2^3 £ 3 £ 47

f 784 = 2^4 £ 72 g 952 = 2^3 £ 7 £ 17

h 6500 = 2^2 £ 53 £ 13

3an=5 bn=8 c n=12

4an=3 bn=6 c n=10 5 3 6 7

7an= 625 bn=7 c n=5 dn=6

EXERCISE 6A.2

1a 1 b¡ 1 c 1 d ¡ 1 e 1 f¡ 1

g¡ 1 h¡ 27 i ¡ 27 j 27 k¡ 36 l 64

Production

Admin

Advertising

Distribution

Marketing 27.8%

20%

10.6%

16.7%

25%

0

10

20

30

40

Chickens

CowsDogsDucksGeeseGoatsPigsSheep

animal type

0

5

10

15

20

25

2004 2005 2006 2007 2008

males

females

Cost

Roses

Tulips Carnations

Orchids

Azaleas

Lilies

102°

48°

30°

42°

48°

90°

Sales

Roses

Tulips Carnations

Orchids

Azaleas

Lilies

105°

42°

45°

45°

48°

75°

40

60

80

100

Jan Feb Mar Apr MayJun Jul Aug Sep Oct NovDec

frequency

month

Business expenses

Speeding driver data

115

116

117

118

119

012345678910

day

price ($)

15 10 5 0 0 5 10 15

3

4

5

6

7

8

9

10

Rhys Evan

0

5

10

15

20

25

012345

men women

number of pets

frequency

Work

36.3%

Apprenticeship

19.2%

University

29.0%

Travel

15.5%

IBM share price data

Rebounds

Pet owner data

IB MYP_3 ANS

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_an\684IB_IGC1_an.CDR Tuesday, 18 November 2008 2:41:23 PM PETER