Cambridge IGCSE - Papers

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Cambridge IGCSE?

MATHEMATICS

Paper 4 (Extended)

MARK SCHEME

Maximum Mark: 130

? UCLES 2017

These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific content of the

mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking principles.

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Generic Marking Principles

GENERIC MARKING PRINCIPLE 1:

Marks must be awarded in line with:

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the specific content of the mark scheme or the generic level descriptors for the question

the specific skills defined in the mark scheme or in the generic level descriptors for the question

the standard of response required by a candidate as exemplified by the standardisation scripts.

Marks awarded are always whole marks (not half marks, or other fractions).

GENERIC MARKING PRINCIPLE 3:

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Marks must be awarded positively:

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marks are awarded for correct/valid answers, as defined in the mark scheme. However, credit is given for valid answers which go beyond the scope of the

syllabus and mark scheme, referring to your Team Leader as appropriate

marks are awarded when candidates clearly demonstrate what they know and can do

marks are not deducted for errors

marks are not deducted for omissions

answers should only be judged on the quality of spelling, punctuation and grammar when these features are specifically assessed by the question as indicated

by the mark scheme. The meaning, however, should be unambiguous.

Cambridge IGCSE ¨C Mark Scheme

SPECIMEN

GENERIC MARKING PRINCIPLE 2:

GENERIC MARKING PRINCIPLE 4:

Rules must be applied consistently e.g. in situations where candidates have not followed instructions or in the application of generic level descriptors.

GENERIC MARKING PRINCIPLE 5:

For examination

from 2020

Marks should be awarded using the full range of marks defined in the mark scheme for the question (however; the use of the full mark range may be limited

according to the quality of the candidate responses seen).

Marks awarded are based solely on the requirements as defined in the mark scheme. Marks should not be awarded with grade thresholds or grade descriptors in

mind.

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GENERIC MARKING PRINCIPLE 6:

MARK SCHEME NOTES

The following notes are intended to aid interpretation of mark schemes in general, but individual mark schemes may include marks awarded for specific reasons

outside the scope of these notes.

Types of mark

B

Method mark, awarded for a valid method applied to the problem.

Accuracy mark, awarded for a correct answer or intermediate step correctly obtained. For accuracy marks to be given, the associated Method mark must be

earned or implied.

Mark for a correct result or statement independent of Method marks.

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When a part of a question has two or more ¡®method¡¯ steps, the M marks are in principle independent unless the scheme specifically says otherwise; and similarly

where there are several B marks allocated. The notation ¡®dep is used to indicate that a particular M or B mark is dependent on an earlier mark in the scheme.

Abbreviations

cao

dep

FT

isw

nfww

oe

SC

soi

correct answer only

dependent

follow through after error

ignore subsequent working

not from wrong working

or equivalent

Special Case

seen or implied

Cambridge IGCSE ¨C Mark Scheme

SPECIMEN

M

A

For examination

from 2020

Answer

Marks

Partial Marks

48

2

1(a)(ii)

32.4[0]

1

1(a)(iii)

13

30

2

1(a)(iv)

24

3

1(b)

660

3

1(c)

663.9[0]

2

M1 for 550 ¡Á 1.01910 oe

1(d)

1.5[0]

3

638.3 [0]

oe

550

10

or M1 for 550 ¡Á m = 638.3[0]

M1 for

72

3

M1 for

72 ? their (ii) ? 8.4

oe

72

19.2

oe

0.8

or M1 for recognising 19.2 is 80%

M2 for

550 # 2 # 10

+ 550 oe

100

550 # 2 # 10

oe

or M1 for

100

M2 for

M2 for

10

Cambridge IGCSE ¨C Mark Scheme

SPECIMEN

Page 4 of 12

1(a)(i)

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? UCLES 2017

Question

For examination

from 2020

Answer

Marks

Partial Marks

2(a)(i)

400

1

2(a)(ii)

70

2

2(a)(iii)

405 to 410

1

2(a)(iv)

170

2

2(b)(i)

Mid-values 40, 80, 125, 200 soi

M1

¦²fx with correct frequencies and x¡¯s in correct intervals or on boundaries of correct

intervals

M1

¡Â 200

M1

Dep on second M1

106 nfww

A1

SC2 for correct answer without working

Correct histogram

R

V

3840

480 W

oe isw SS

10 712

1339W

T

X

B1 for 30 seen

4

B1 for correct widths

and

B1 for each rectangle of correct height at 0.8, 1.6,

1.6 (up to B3)

After 0 scored, SC1 for 3 correct frequency

densities seen

3

24 # 80 m

oe

M2 for [2¡Á] c

104 103

24 80

seen

or M1 for

,

104 103

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2(b)(iii)

M1 for upper quartile = 420 or lower quartile =

350

Cambridge IGCSE ¨C Mark Scheme

SPECIMEN

2(b)(ii)

0580/04

? UCLES 2017

Question

For examination

from 2020

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