# mark scheme june 2010

mark scheme june 2010 unit 3

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

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Mark Scheme (Results)
Summer 2010
GCSE
GCSE Mathematics (2381)
Calculator Paper 14H

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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 ­ 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

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GCSE MATHEMATICS 2381 (MODULAR)
5384H/14H
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
2 (a) 1.25 × 620 775 2 M1 for 1.…read more

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GCSE MATHEMATICS 2381 (MODULAR)
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)
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)
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)

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GCSE MATHEMATICS 2381 (MODULAR)
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

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GCSE MATHEMATICS 2381 (MODULAR)
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