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Mathematics Syllabus A
General Certificate of Secondary J512/03
Paper 3

Mark Scheme for June 2010

Oxford Cambridge and RSA Examinations

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OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing a wide range of
qualifications to meet the needs of pupils of all ages and abilities. OCR qualifications include
AS/A Levels, Diplomas, GCSEs, OCR Nationals, Functional Skills, Key Skills, Entry
Level qualifications, NVQs and vocational qualifications in areas…

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J512/03 Mark Scheme June 2010

Marking Instructions & Abbreviations

Marking instructions

1 Mark strictly to the mark scheme.

2 Make no deductions for wrong work after an acceptable answer unless the mark
scheme says otherwise.

3 Work crossed out but not replaced should be marked.

4 M (method) marks are…

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J512/03 Mark Scheme June 2010

11 Unless the question asks for an answer to a specific degree of accuracy, always mark
at the greatest number of significant figures seen. E.g. answer on mark scheme is
15.75 which is seen in the working. The candidate then rounds or truncates this to…

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J512/03 Mark Scheme June 2010

1 (a) In (a) mark the best part of the answer
(i) E.g. Answer should be negative 1 Soi e.g. -16.65
NOT after wrong operation
e.g. 3.7 + -4.5 = -0.8
(ii) E.g. Answer > 8 or 64 = 8 1 Soi e.g. 72 =…

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J512/03 Mark Scheme June 2010

8 (a) 90° cao 1
(b) Translation cao 1 Must be a single transformation type
1 right, 7 up or 7 2 B1 for 1 right or 7 up

n 1
Or B1 for 7 or n

1 7
Or SC1 for 1 left,…

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J512/03 Mark Scheme June 2010

11 Compass arc 6cm ± 2mm from A M1 Any length
Ruled perpendicular bisector drawn B2 M1 for at least one pair of crossing compass
arcs (not just touching) equal radius from B
and C

2 points only, clearly identified as B2 B1 for one…

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J512/03 Mark Scheme June 2010

17 (a) 22x ­ 3 final answer 2 B1 for 22x ± n seen, n 0
22x 22x
Or SC1 for 3 or or 22x × 2-3
2 8
(b) x=4 3 B1 for 25 soi
And M1 for their(2x ­ 3) = their 5…

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OCR (Oxford Cambridge and RSA Examinations)
1 Hills Road

OCR Customer Contact Centre

14 ­ 19 Qualifications (General)
Telephone: 01223 553998
Facsimile: 01223 552627
Email: [email protected]

For staff training purposes and as part of our quality assurance
programme your call may be recorded or monitored



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