Maths Edexcel Paper 3 unofficial markscheme

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Poll: What do you think you got out of 240?
Below 50 (29)
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51-100 (38)
9.38%
101-130 (62)
15.31%
131-150 (67)
16.54%
151-180 (83)
20.49%
181-220 (94)
23.21%
221-240 (32)
7.9%
zward
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Unofficial Markscheme: June 12 2018 3H Edexcel Maths




1a) Negative [1 mark]

1b) Anomalous – doesn’t fit trend [1 mark]

1c) Extrapolation – outside data range so unreliable [1 mark]

2) 9p + 13 [2 marks]

3) Triangle drawn with area 18 [2 marks]

4) Shouldn’t be 0.25 on first throw, should be 0.35.

On the second row they were the wrong way around [2 marks]

5a) 50.5 deg [2 marks]

5a) cos x increased as 7/10 is greater than 7/11 [1 mark]

6a) 8 counters[3 marks]

6b) Divisible by 2 [1 mark]

7) 19/5 or 3.8 [3 marks]

8) £150,000 [4 marks]

9a) Gradient is 3/2 [2 marks]

9b) Shows the rate of change of volume with respect to time

[1 mark]

9c) Starts at 4 litres full [1 mark]

10) Flashes 10 times an hr [4 marks]

11) 140 deg [5 marks]

12a) 4.52 . 103[2 marks]

12b) Lottie’s is wrong as denominator also increased

[1 mark]

13) 240 matches [2 marks]

14) 6.50 cm3 [3 marks]

15a) 42[3 marks]

15b) Un = n2 – n [2 marks]

16a) 497.5m[3 marks]

16b) Underestimate+reasons

[1 mark]

17) 5/3 [5 marks]

18a) Shown solution between 1 and 2 [2 marks]

18b) Rearranged [1 mark]

18c) 1.74… [3 marks]

19) 13.1cm[5 marks]

20) 3/245[5 marks]

21a+b) Proof [4+2 = 6 marks]











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K.o123
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#2
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cos 5a is decrease
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jk1947
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wasn’t the matches question 480 because they play each team twice??
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zward
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the cos(angle) was an increase because it went from 7/11 to 7/10

the matches was 16x15 = 240
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username3973192
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#5
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#5
Flipping hell, I'm not gonna look at this post.... or I just might kill myself
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zehniqbal1
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#6
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#6
what was question 17
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username4017232
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#7
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#7
What was the question for 7?
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ErwinRommel
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#8
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#8
a lot of these seem wrong imo matches was 480......
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jackthebeast123
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#9
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#9
what was question 19 about?
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jackthebeast123
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#10
anyone?
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zward
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#11
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#11
question 7 i don't know - i just saw the answer of 3.8 on other unofficial markschemes

question 17 was the one where tan(e) = tan(f)

question 19 was the sine rule and cosine rule question
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23jrahman
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#12
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#12
(Original post by ErwinRommel)
a lot of these seem wrong imo matches was 480......
yeh I got 480!
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AStudent04
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(Original post by zward)
the cos(angle) was an increase because it went from 7/11 to 7/10

the matches was 16x15 = 240
They played 2 each, it was 480.
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AStudent04
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(Original post by zward)
Unofficial Markscheme: June 12 2018 3H Edexcel Maths




1a) Negative [1 mark]

1b) Anomalous – doesn’t fit trend [1 mark]

1c) Extrapolation – outside data range so unreliable [1 mark]

2) 9p + 13 [2 marks]

3) Triangle drawn with area 18 [2 marks]

4) Shouldn’t be 0.25 on first throw, should be 0.35.

On the second row they were the wrong way around [2 marks]

5a) 50.5 deg [2 marks]

5a) cos x increased as 7/10 is greater than 7/11 [1 mark]

6a) 8 counters[4 marks]

6b) Divisible by 2 [1 mark]

7) 3.8? [? marks]

8) £150,000 [5 marks]

9a) Gradient is 3/2 [3 marks]

9b) Shows the rate of change of volume with respect to time

[1 mark]

9c) Starts at 4 litres full [1 mark]

10) Flashes 10 times an hr [5 marks]

11) 140 deg [5 marks]

12a) 4.52 . 103[2 marks]

12b) Lottie’s is wrong as denominator also increased

[2 marks]

13) 240 matches [2 marks]

14) 6.50 cm3 [5 marks]

15a) 42[3 marks]

15b) Un = n2 – n [2 marks]

16a) 497.5m[3 marks]

16b) Underestimate+reasons

[1 mark]

17) 5/3 [5 marks]

18a) Shown solution between 1 and 2 [2 marks]

18b) Rearranged [1 mark]

18c) 1.74… [4 marks]

19) 13.1cm[5 marks]

20) 3/245[5 marks]

21a+b) Proof [4+2 = 6 marks]










Matches was 480, as two each.
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jcobley1
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For the last question I said it was congruent by RHL. I think it's the same as RHS but will I lose marks?
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alphamale27
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#16
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the marks are wrong, you're saying it was out of 85 marks without even including marks for one of them.
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george.p16
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(Original post by jk1947)
wasn’t the matches question 480 because they play each team twice??
I agree
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AStudent04
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#18
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#18
(Original post by jcobley1)
For the last question I said it was congruent by RHL. I think it's the same as RHS but will I lose marks?
It was ASA, as you were given Right angle, side (parallelogram) and angle (parallelogram)... You might get some marks though...
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huahl
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#19
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#19
Question 9c is wrong and 10 is wrong as well
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huahl
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#20
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#20
They r the wrong question there was no liters types of question in the exam
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