2012 Edexcel Foundation B Paper 1 Mark Scheme

5/24/2018 2012 Edexcel Foundation B Paper 1 Mark Scheme

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For Edexcel

GCSE Mathematics

Foundation Tier

Paper 1B (Non-Calculator)

Marking Guide

Method marks (M) are aarded !or knoing and using a correct method"

#ccurac$ marks (#) are aarded !or correct ansers% ha&ing used a correct

method"

(B) marks are independent o! method marks"

(C) marks are !or communication"

'ritten $ haun #rmstrong

*nl$ to e copied !or use in the purchaser+s school or college

,1, EFB Paper 1 marks Page 1 . Churchill Maths /imited


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Foundation Tier Paper 1B Marking Guide

1 (a) 73020 B1

(b) eight thousand, one hundred and six B1

(c) 2.3 B1

(d) 300 B1 Total 4

2

B1

B1

B1 Total 3

3 (a) 4 B1

(b) 7 B1

(c) 912

[ 34

! B1 Total 3

4 (a) 90

100[

9

10! B1

(b) 1"0 # 10 1" B1

(c) 1"0 # 4 40 $13 % 40 120 &1 Total 4

5 (a) 3'0 B1

(b) "0 B1

(c) 7.2 B1

(d) 140 B1 Total 4

,1, EFB Paper 1 marks Page , . Churchill Maths /imited

diaeter

tangent

radius


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6 (a) e.g. n a*erage, ho+ long do ou s-end+aling our dog(s) each da/ B1

Tic one box

B1

(b) e.g. biased these -eo-le are ore liel tos-end ore tie than is t-ical B1 Total 3

7 (a) 30 B1

(b) 1' % "0 $1

"00 300 900 &1 Total 3

8 (a) '

12B1

(b) 7

20% 100 7 % ' 3' $1 &1

(c) 3

' 0.", 0."2,

2

3 0.""..., '9 0.'9 $1

ordered as decials 0.'9, 0.", 0."2, 0.""...

ordered '9,3

', 0."2,

2

3&1 Total '


ess than

20 inutes

20 to 40

inutes

$ore than

40 inutes


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9 e.g. x 0 2 4y 2 0 2 $1

$1 &1

Total 3

10 (a) 5 1.6 [ acce-t 1." to 2.0 ! B1

(b) e.g. height o an 5 " eetheight o girae 5 2.' % height o an $1[ acce-t 2 to 3 % height o an !height o girae 5 1' eet &1 Total 3

11 (a) 9 2' 34 B1

(b) ' % " 30 B1

(c) 10000 B1 Total 3

12 (a) add 6 to the -re*ious ter B1

(b) (i) 22 B1

(ii) 61 B1

(c) 3, 7, 11, 1' B2 Total '

,1, EFB Paper 1 marks Page . Churchill Maths /imited

y

xO

1

2

4

3

'

1 2 43 '3 2 1

2

3

1

"

7


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*13 e.g. 8ood and litter cost " -er +ee in total so other costsust be less than 4 -er +ee B1ther costs:nsurance 12 % " 72 -er ear $1;ets ees '0 -er ear


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16 (a) 3 B1

(b) 2 3 3 4 ' " 6 9 $1

edian 4.' &1

(c) 2 9 6 3 4 ' 3 " 40 $1

ean 40 # 6 ' &1 Total '

*17 as angles on a straight line total 160@,angleRQT 160 146 32@ $1angle QRT 160 10" 74@as angles in a triangle total 160@,angle QTR 160 (32 74) 160 10" 74@ $1as angle QRT angle QTR, triangle QRTis isoscelesso length QR QT ?1 Total 3

[ complete argument, clear to follow ]

18 A area 20 % 20 400 c2 $11 100 c*olue 400 % 100 40000 c3 $1*olue o 4 boxes 4 % 40000 1"0000 c3 &1cost 1"0 % 20- 3200- 32 $1 &1 Total '

19 (a) 9 " 3 16

C "

16

1

3$1 &1

(b) 1 x B1 Total 3

20 let nuber sold at brea bexat lunch he sold 4x B1ater school he soldx 2

x 4xx 2 20 $1 &1"x 2 20"x 16 $1

x 3 &1 Total '

21 e.g. bus is chea-er than shared taxi B1staing 2 % 2' 4 % 2 39.99 $1

'0 6 39.99 97.99 &1not staing 4 % 20 6 % 2

60 1" 9" $1chea-est b not staing and using bus, cost 9" &1 Total '



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22 (a) '0 in 1 hour so '0 =h B1

(b) 30 inutes B1

(c) 90 # 4' 2 hours $1

B1 &1

Total '

*23 30 # " ', '0 # " 6.333, "0 # " 10 $1nuber o cubes ' % 6 % 10 400 $1nuber o -ieces 2 % 400 600 &1

reaining -art o cuboid is 2 c +ide canDt ae ore -ieces600 -ieces can be cut ro the bloc ?1 Total 4

[ rounds down appropriately, states (or uses diagram to show extra is wasted, valid methodand consistent answer, allow arithmetic errors ]

24 (a) 7 # 20 0.3' B1

E(b) e.g. re-eating +ill -robabl gi*e dierent results 20 rolls is too e+ to be sure that dice is biased ?2 Total 3

[ clear valid explanation ]

25 (a) !F 3 B1

(b) xG 4 B1

(c) 'r 3rH 9 1 $12rH 10rH ' $1 &1 Total '

TOT! FO" PP#"$ 100 M"%&


11 112 2

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20

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2012 Edexcel Foundation B Paper 1 Mark Scheme

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