2017 Edexcel GCSE Maths 9-1 Paper 3 (Higher) Unofficial Mark Scheme Watch

Poll: How many marks do you think you got?
0-10 (111)
2.5%
11-20 (174)
3.93%
21-30 (473)
10.67%
31-40 (599)
13.51%
41-50 (651)
14.69%
51-60 (765)
17.26%
61-70 (831)
18.75%
71-80 (829)
18.7%
hebeb
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#1



Here are worked solutions (not mine): https://www.thestudentroom.co.uk/att...6&d=1497372272
Let me know if I'm wrong as always

Marks for each question aren't definitely right - I haven't seen the paper yet, so take them with a pinch of salt, they'll be off by 1-2 marks here and there.

1. (a) Complete Venn diagram (4 marks)
(b) 7/15 (2 marks)
2. x = -2/3; y =-2 (3 marks)
3. 68 lemon cakes (5 marks)
4. Prove that P is a hexagon: find exterior angle = 60°. 360/60 = 6 sides therefore hexagon. Alternatively find interior angle = 120°, its regular therefore it's a hexagon (4 marks)
5. (a) Median dress size = 12 (2 marks)
(b) Zoe is wrong because the events are independent (1 mark)
6. Combinations - the guy is wrong - can't be 215 combinations because 215 doesn't divide by 17 (2 marks)
7. Density of new drink = 1.01g/cm^3 (4 marks)
8. Compound interest - x = 6% (3 marks)
9. Length of side of square in circle = 5.59cm (4 marks)
10. Length of x = 5.86 cm (SOHCAHTOA) (3 marks)
11. (a) Box plot - interquartile range = £180 (2 marks)
(b) Draw box plot (2 marks)
(c) The person is correct, the girls spent more because the median was higher (1 mark)
12. AB:BC:CD = 3 : 4 : 11 (3 marks)
13. (a) Simplify - (x+4)/(2x+3) (2 marks)
(b) v = 15t/(w+30) (2 marks)
14. Inequalities that define region: y>=x; y<=1/2x+1; y>=-2 (4 marks)
15. Find x given area of triangle: x=2.63cm (5 marks)
16. (a) Bounds - must be less than 160, upper bound is 153km/h (4 marks)
(b) would make no difference to the decision, still less than 160km/h; upper bound decreases (1 mark)
17. (a) Iteration - x1 = -2.64; x2 = -2.57; x3 = -2.60 (3 marks)
(b) significance to equation: approximate roots; x3 is more accurate than x1 (2 marks)
18. Arc length = 21.6cm (5 marks)
19. X < -2; x > 1/2 (3 marks)
20.(a) Co ordinates of y intercept = (0,1) (1 mark)
(b) Draw circle on graph - x intercepts (-1,0) and (7,0); centre (3,0) (3 marks)

Thanks to everyone who's given me answers
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Cor Cordis
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Worth noting, if anyone thinks they could do with some help, Tutorful and MyTutor both offer private online tutoring from £15 a session. I've found it super helpful, even just to top up my studies a bit and reach for better grades bit by bit.
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hebeb
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(Original post by joefitz123)
Is the 21.6 answer the arc length?
Yes sorry, but I can't vouch for its accuracy because it's not my answer, I got that one wrong ha
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IsaacRay
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(Original post by hebeb)
Any help with the gaps would be good, and let me know if I'm wrong as always

1. (a) Complete Venn diagram (4 marks)
(b) 7/15 (2 marks)
2. x = 2/3; y =-2 (3 marks)
3. 68 lemon cakes (5 marks)
4. Prove that P is a hexagon (4 marks)
5.
6.
7. Density of new drink = 1.01g/cm^3
8. Compound interest - x = 6%
9. Length of side of square = 5.59cm
10. Length of x = 5.86 cm (SOHCAHTOA)
11. (a) Box plot - interquartile range = £180
(b) Draw box plot
(c) The person is correct, the girls spent more because the median was higher
12. AB:BC:CD = 3:4:11
13. (a) Simplify - (x+4)/(2x+3)
(b) v = 15t/(w-30)
15.
16. (a) Bounds - must be less than 160, upper bound is 153km/h
(b) would make no difference to the decision, still less than 160km/h; upper bound decreases
17. (a) Iteration - x1 = -2.64; x2 = -2.57; x3 = -2.60
(b) significance to equation: approximate roots; x3 is more accurate than x1
18. Arc length = 21.6cm
19. X < -2; x > 1/2
20.(a) Co ordinates of y intercept = (0,1)
(b) Draw circle on graph - x intercepts (-1,0) and (7,0)
I thought the venn diagram probability was 1 /15 (as only one 15 was inside the intersect?)
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hebeb
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(Original post by IsaacRay)
I thought the venn diagram probability was 1 /15 (as only one 15 was inside the intersect?)
No sorry, it wanted the union which is A OR B
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12spowell
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(Original post by hebeb)
Any help with the gaps would be good, and let me know if I'm wrong as always

1. (a) Complete Venn diagram (4 marks)
(b) 7/15 (2 marks)
2. x = 2/3; y =-2 (3 marks)
3. 68 lemon cakes (5 marks)
4. Prove that P is a hexagon (4 marks)
5.
6. The guy is wrong - can't be 215 combinations because 215 doesn't divide by 17
7. Density of new drink = 1.01g/cm^3
8. Compound interest - x = 6%
9. Length of side of square = 5.59cm
10. Length of x = 5.86 cm (SOHCAHTOA)
11. (a) Box plot - interquartile range = £180
(b) Draw box plot
(c) The person is correct, the girls spent more because the median was higher
12. AB:BC:CD = 3:4:11
13. (a) Simplify - (x+4)/(2x+3)
(b) v = 15t/(w-30)
15.
16. (a) Bounds - must be less than 160, upper bound is 153km/h
(b) would make no difference to the decision, still less than 160km/h; upper bound decreases
17. (a) Iteration - x1 = -2.64; x2 = -2.57; x3 = -2.60
(b) significance to equation: approximate roots; x3 is more accurate than x1
18. Arc length = 21.6cm
19. X < -2; x > 1/2
20.(a) Co ordinates of y intercept = (0,1)
(b) Draw circle on graph - x intercepts (-1,0) and (7,0)

I think that for 12 its 3:4:11
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B-122
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(Original post by IsaacRay)
I thought the venn diagram probability was 1 /15 (as only one 15 was inside the intersect?)
I thought the lemon cakes were 87
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ethann
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#8
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On the 215 combinations did the person's statement say when there are 17 trees and 1 tree or was it always 17 and some?
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AIR127
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#9
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I think y = -2 and x = -2/3 for the simultaneous equation
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IsaacRay
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#10
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(Original post by hebeb)
No sorry, it wanted the union which is A OR B
It was: A ∩ B

and only 15 was in both sets...?
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Shanpatel00
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(Original post by 12spowell)
I think that for 12 its 3:4:11
yes it was
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dinaaa12345
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#12
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if i got like 20-30 marks on each paper, what grade would i get? bad marks ik
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MolsyT
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For question 2 it is -2/3
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iLegend123
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Thanks hebeb, I got all of these answers except zoe is wrog because they are not mutually exclusive. Also you cant tell whether the girls spent more as you dont kknow how many girls there were
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Shanpatel00
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(Original post by dinaaa12345)
if i got like 20-30 marks on each paper, what grade would i get? bad marks ik
prolly like a 4-5, six if your very lucky
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hebeb
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#16
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(Original post by IsaacRay)
It was: A ∩ B

and only 15 was in both sets...?
The question was A U B, it wanted A or B
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oliver45456
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#17
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#17
I put 5.58 for one question but everyone else got 5.59. Did i get it wrong - ( i rounded it correctly btw)
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YourCaesar
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#18
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For the inequality graph, I didn't write the equal to symbols, only the normal ones.
This is truly a sad day for me.
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IsaacRay
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#19
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(Original post by hebeb)
The question was A U B, it wanted A or B
anyone else know please?
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Fox Corner
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#20
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Nice markscheme! I've added it to the Unofficial Markscheme List
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