# mark scheme june 2010

mark scheme june 2010 unit 3

- Created by: SONIKA
- Created on: 01-06-11 15:12

First 16 words of the document:

Mark Scheme (Results)

Summer 2010

GCSE

GCSE Mathematics (2381)

Calculator Paper 14H

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For further information please call our Customer Services on + 44 1204 770 696, or visit our website at www.edexcel.com.…read more

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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

cao correct answer only ft follow through

isw ignore subsequent working SC: special case

oe or equivalent (and appropriate) dep dependent

indep - independent

3 No working

If no working is shown then correct answers normally score full marks

If no working is shown then incorrect (even though nearly…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Follow through marks which involve more than one stage of calculation can only be awarded on sight of the relevant working, even if

it appears obvious that there is only one way you could get the answer given.

6 Ignoring subsequent work

It is appropriate to ignore subsequent work when the additional work does not change the answer in a way that is inappropriate for

the question: e.g.…read more

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GCSE MATHEMATICS 2381 (MODULAR)

5384H/14H

Question Working Answer Mark Notes

1 120 ×1.5 180 3

6

8 ×1.5 12 M1 for × 6 ÷ 4 or oe or ÷4×6 or ( 120 + 60 ) or 1.5 seen

420 × 1.5 630 4

or sight of any one of the four correct answers

180 ×1.5 270

A1 for 2 or more correct answers

A1 for 4 correct answer

2 (a) 1.25 × 620 775 2 M1 for 1.…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Question Working Answer Mark Notes

3 (a) ×12 37.7 2 M1 for ×12 (accept as 22/7 or 3.1 or better)

A1 for an answer in the range 37.6 37.8

(b) × 6× 6 113 2 M1 for × 6 × 6 (accept as 22/7 or 3.1 or better)

A1 for an answer in the range 113 113.2

4 x = 1 gives 11 1.9 4 B2 for a trial between 1.8 x 1.…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Question Working Answer Mark Notes

5 (a) 8 x = 17 + 3 2.5 2 M1 for 8x = 17 + 3 or 8x 3 + 3 = 17 + 3 or for

8x/8 3/8 = 17/8 or for ('17+3')÷8

20

A1 for 2.5 or oe

8

NB embedded answer of 2.5 must be clearly indicated in

the equation and gets SC B1

(b) y = 9×3÷2 13.…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Question Working Answer Mark Notes

2 2

8 62 + 142 = 232 15.23 3 M1 for 6 + 14 or 36+196 or 232

M1 for 36 + 196 or 232

A1 for answer in the range 15.2 - 15.3

9 (a) 2 B2 cao

1cm (B1 for a rectangle 4cm×1cm or a rectangle 4cm × 2cm.

1cm Could be attached to other rectangles)

4cm Do not accept rectangles with additional external lines.…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Question Working Answer Mark Notes

11 2 B2 for correct locus within guidelines (overlay)

(B1 for a line drawn parallel to either given line

OR a line passing through the angle outside of the

guidelines OR for a line drawn within guidelines but not

passing through angle)

12 A A = 3r2 2

r =

2

A

3 M1 for r 2 = or an attempt to square both sides or an

3

attempt to multiply both sides by 3

A1…read more

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GCSE MATHEMATICS 2381 (MODULAR)

Question Working Answer Mark Notes

15 (a) 28.5 1 B1 for 28.5 or 2850 cm or 28.499 or 28.49...

(b) 2 × (147.5 + 28.5) 352 3 B1 for upper bound of length = 147.5 or 14750 cm or

147.49 recurring oe

M1 for 2 × ("upper bound width" + "upper bound

length"), where these are not the given values

A1 for answer in the range 351.…read more

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