0580 MATHEMATICS - Cambridge International Examinations

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0580 MATHEMATICS. 0580/23. Paper 2 (Extended), maximum raw mark 70 ... Page 2. Mark Scheme. Syllabus. Paper. IGCSE – October/November 2012. 0580.
CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education

MARK SCHEME for the October/November 2012 series

0580 MATHEMATICS 0580/23

Paper 2 (Extended), maximum raw mark 70

This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers.

Cambridge will not enter into discussions about these mark schemes.

Cambridge is publishing the mark schemes for the October/November 2012 series for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level components and some Ordinary Level components.

Page 2

Mark Scheme IGCSE – October/November 2012

Syllabus 0580

Paper 23

Abbreviations cao correct answer only cso correct solution only dep dependent ft follow through after error isw ignore subsequent working oe or equivalent SC Special Case www without wrong working

1

2

96

2

1 4 + or 0.12 + 0.42 oe 100 25 1 16 + = 0.17 or 0.01 + 0.16 = 0.17 100 100

600 × 2 × 8 oe 100 If zero SC1 696

M1 for

M1 M1

Independent

300×12 oe 20

3

180

2

M1 for

4

3y – y4 final answer

2

B1 for 3y or – y4 as part of two term expression

5

88.2(0)

2

M1 for 84 × 1.05 oe

6

Accurate perpendicular bisector of RT with arcs.

2

B1 for 2 pairs of correct arcs B1 for correct line

7

8.471 cao

2

B1 for 8.47 or 8.4705 to 8.4706 or

8

249.5 [Y j