# nov 2010 mark scheme

november 2010 mark scheme edexcel umit 3

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• Created on: 01-06-11 15:09
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### Page 1

Mark Scheme (Results)
November 2010

GCSE

GCSE Mathematics (5384H)
Paper 13H

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Edexcel is one of the leading examining and awarding bodies in the UK and throughout the world. We provide a wide range of qualifications
including academic, vocational, occupational and specific programmes for employers.
Through a network of UK and overseas offices, Edexcel's centres receive the support they need to help…

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GCSE MATHEMATICS 2381 (MODULAR)

NOTES ON MARKING PRINCIPLES

1 Types of mark
M marks: method marks
A marks: accuracy marks
B marks: unconditional accuracy marks (independent of M marks)

2 Abbreviations
isw ­ ignore subsequent working SC: special case
oe ­…

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GCSE MATHEMATICS 2381 (MODULAR)

Follow through marks which involve a single stage calculation can be awarded without working since you can check the answer
yourself, but if ambiguous do not award.
Follow through marks which involve more than one stage of calculation can only be awarded…

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GCSE MATHEMATICS 2381 (MODULAR)

5384H/13H
1 24 ÷ 2 36 2 3
M1 for 24 ÷ 2 or ×12 oe or 24 + 12
2
or sight of the number 12
A1 cao

2 15 × 200 30 m or 3000 cm 2 M1 for…

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GCSE MATHEMATICS 2381 (MODULAR)

7 600 + 300 + 150 405 6 M1 for 600 + 300 + 150 oe or shows a method to find
6000 + 1050 the VAT eg 6000 × 0.175 oe
7050 - 3000 M1 for 6000 + "1050"
4050…

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GCSE MATHEMATICS 2381 (MODULAR)

10 (a) Speed = distance ÷ time 32 2 M1 for 16 × 2 or attempts to find the speed by
16 16
distance ÷ time: or 16 ÷ ½ or or 0.53(33..)
30 1/ 2
A1 cao

(b) Correct line…

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GCSE MATHEMATICS 2381 (MODULAR)

12 (a) 15 ÷ 10 12 2 3 2
8 × 1.5 M1 for 15 ÷ 10 or sight of 1.5 or or
2 3
A1 cao
(b) ½ × (8 +"a") × 5 50 2 NB: ft from (a) provided…

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GCSE MATHEMATICS 2381 (MODULAR)

14 (x + 9)(x - 1) = 0 x = 1 or 3 M2 for (x + 9)(x - 1)
x=-9 (M1 for (x ± 9)(x ± 1))
A1 cao

OR OR
a = 1, b = 8, c = -…

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GCSE MATHEMATICS 2381 (MODULAR)

16 (a) 1 2 1 1
(a + b) M1 for OP = a + b or OM = OT + TP
OP = a + b 2 2 2
or OP = OT + TP
1
OM = OP A1…