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# Edexcel GCSE Maths Paper 2 (9/6/16) Complete Unofficial Mark Scheme

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1. This is the completed unofficial mark scheme for the June 2016 Edexcel Maths Paper 2 (Calculator), which shows the topic/question, number of marks and the answers.
1. Stem and Leaf Diagrams, Probability (5)
a) Order numbers correctly and include a key
b) 0.45 or equivalent
2.Algebra (3)
a) 5a*2b*3c = 30abc
b) Factorise fully 3y +6 = 3(y+2)
c) Expand x(x-3) = x^2 - 3x
3. Perimeter/Value Of X (3)
x = 9.25
4. Best Value (4)
The small packet was best value for money because it was cheapest per bag of crisps.
5. Probability (3)
Green - 0.09
Red - 0.36
6. Percentage Increase, BMI (7)
a) 20.3
b) 68.04kg
c) 2.61m
7. Trial And Improvement (4)
3.8
8. Ratio (4)
a) 4:3
b) 480 pixels
9. Parallel Line Theorems (4)
x = 124 degrees
10. Mean Of Grouped Frequency Table (4)
7.92
11. Conversion (5)
£42.28
12. Angles in Pentagon, (4)
x = 144 degrees
13. Cubic Graph, (4)
-2 -1 0 1 2
-1 3 1 -1 3
points plotted and curve drawn on graph
14. Density, Area & Volume (5)
3 Bars
15. Compound Interest, Percentage Decrease (4)
No, because £7766.22 was greater than £7500
16. Cumulative Frequency (3)
a) 128g
b) 11g
17. Pythagoras and Trigonometry (4)
30.1 degrees
18. Rearranging Formulas (5)
a) 10a^5b^4
b) y = 5p^2-x
19. Stratified Sampling (2)
11 males
x= 0.29 or x= -2.29
21. Bounds (3)
29.25
22. Histograms (3)
Frequency densities of 1.6, 3.2, 2.4, 1.8, 0.3
23. Arc Length, Perimeter (3)
28.9 24.
Algebraic Fractions (5)
a) -1/3x+4
b) 2x/(x+1)(x-1)
25.Trigonometry, Sine/Cosine Rules, Area of a Triangle (6)
80.4
2. How did you get -1/3x+4
in q42a?
3. For question 7 it was 3.7 wasn't it? It was closer than the 3.8 value
4. For question 23, do you get marks for working out the area ?
( using the formula)
For question 25 I got 81.8 but did trig area of triangle and cosine rules how many marks do i get for just getting the question wrong

For question 15 i got no but i didn't get 7766.22 how many marks

For question 11 i got 51.43 but I did all the working out how many marks will I receive?
5. (Original post by ussj)
For question 7 it was 3.7 wasn't it? It was closer than the 3.8 value
No it was not as the value of 3.75 was closer to the value but still lower so it was 3.8
6. (Original post by ussj)
For question 7 it was 3.7 wasn't it? It was closer than the 3.8 value
No, it seemed as if 3.7 was closer, but if you tested 3.75 if it was too small, and therefore rounds to 3.8
7. (Original post by ussj)
For question 7 it was 3.7 wasn't it? It was closer than the 3.8 value
Exactly I got 3.75 was just above it by decimals and 3.65 was just below it by decimals
8. (Original post by lj42_m)
How did you get -1/3x+4
in q42a?
I got 1 over 3x+4
9. But it was wrong.. still method marks
10. For question 23, do you get marks for working out the area ?
( using the formula)
For question 25 I got 81.8 but did trig area of triangle and cosine rules how many marks do i get for just getting the question wrong

For question 15 i got no but i didn't get 7766.22 how many marks

For question 11 i got 51.43 but I did all the working out how many marks will I receive?
11. (Original post by Burkay)
I got 1 over 3x+4
I got 3-x/(x-3)(3x+4) because I didn't think that it could be simplified?!?
12. not with you on the last question

1/2 x a x b x sin(c) = area

1/2 x 7 x 8 x sin(c) = 18

it turned out to be like 40.01 I subbed it in and it worked
13. I estimated that I got 43 using this mark scheme and 36 on the non calc so together thats's 79 what grade is that?
14. also you can further simplify (x-1)(x+1) to 2x/x2 - 1
15. (Original post by lj42_m)
How did you get -1/3x+4
in q42a?
I think this answer is wrong also as when you factorise the denominator, you get (3x+4) (x-3) and the numerator was 3-x . 3-x and x-3 are not the same thing. Therefore, you can't cancel out.
16. (Original post by Burkay)
For question 23, do you get marks for working out the area ?
( using the formula)
For question 25 I got 81.8 but did trig area of triangle and cosine rules how many marks do i get for just getting the question wrong

For question 15 i got no but i didn't get 7766.22 how many marks

For question 11 i got 51.43 but I did all the working out how many marks will I receive?
q23- I don't know, but I would assume that you wouldn't as it asked for perimeter I think.
If you only got the answer wrong on the last question you would get marks, possibly 4, or 5/6.
For 15, you would perhaps get the C mark, but not the others.
Can't remember what q11 was....
17. (Original post by 0lut0)
I estimated that I got 43 using this mark scheme and 36 on the non calc so together thats's 79 what grade is that?
C
No dispute either way.
18. (Original post by leopard923)
I think this answer is wrong also as when you factorise the denominator, you get (3x+4) (x-3) and the numerator was 3-x . 3-x and x-3 are not the same thing. Therefore, you can't cancel out.
That is what I thought....
19. (Original post by iamamarxist)
not with you on the last question

1/2 x a x b x sin(c) = area

1/2 x 7 x 8 x sin(c) = 18

it turned out to be like 40.01 I subbed it in and it worked
I got 40 for the angle
20. (Original post by 0lut0)
I estimated that I got 43 using this mark scheme and 36 on the non calc so together thats's 79 what grade is that?
A C I think

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Updated: June 13, 2016
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