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

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
20. Quadratic Equation (3)
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

Scroll to see replies

Reply 1

lj42_m

How did you get -1/3x+4
in q42a?

Reply 2

ussj

For question 7 it was 3.7 wasn't it? It was closer than the 3.8 value

Reply 3

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?

Reply 4

Burkay

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

Reply 5

lj42_m

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

Reply 6

Dominator16

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

Reply 7

Burkay

Original post by lj42_m

How did you get -1/3x+4
in q42a?

I got 1 over 3x+4

Reply 8

Burkay

But it was wrong.. still method marks

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?!?

Reply 11

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

Reply 12

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?

Reply 13

iamamarxist

also you can further simplify (x-1)(x+1) to 2x/x2 - 1

Reply 14

leopard923

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.

Reply 15

lj42_m

Original post by Burkay

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....

Reply 16

peter104

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.

Reply 17

lj42_m

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....

Reply 18

Burkay

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