Edexcel GCSE Mathematics A Higher Paper 2016 Unofficial Markscheme

How is question 11, 36%. Please can you show the working out.

Yeah I got all the same answers. Does anyone remember what they got for using the graph to estimate the x^2+4x-2=0 etc.

the percentage question was 36%.
the number of females were 11.
the shaded area in a square was 100-25TT = 25(4-TT).

was the answer to the standard form question 7x10^9
i think the question was (3.5x10^6)/(5x10^-3)
i think.. dont quote me on that

Agree. Reckon the grade boundaries will be 99 for an A*, 98 for an A, 97 for a B, 96 for a C ahaha

Q?? - Estimate 892/18.9 (or something idk) (2 marks - maybe)
Round to 1sf
900/20 = 45

Q?? - Angle = 69 (4 marks [I think])

180-48-48 = 84 (angles in a triangle sum to 180 & base angles in an isosceles are equal)
84/2 = 42 (angle at the centre is twice the angle at the circumference)
(180-42)/2 = 69 (angles in a triangle sum to 180 & base angles in an isosceles are equal)
Therefore angle = 69 (alternate segment theorem)

Q?? - Angie does not have enough varnish (5 marks)

Total area = (4x10) + (2x2.5x2) = 50 metres squared
Litres required = 50/5 = 10 litres
Angie has = 3 x 2.5 = 7.5 litres
10 litres > 7.5 litres

Q?? - find shaded area of triangles in square= 25(4 - π) (5 marks)

Square = 10x10 = 100 cm squared
Circle = π x 5 squared = 25π
Shaded = 100 - 25π = 25 (4 - π)

Q25 - find the shaded area = 3 - root6/12 (3 marks)

(root2/2 x root2/2)x 1/2 = 1/2 x 1/2 = 1/4 cm squared
(root3/3 x root2/2) x 1/2/ = root6/6 x 1/2 = root6/12 cm squared
1/4 - root6/12 = 3/12 - root6/12 = 3 - root6/12

That's all I can remember for now

someone talk about the vectors question

Q1 750cm^3
Q2 too vague and no timeframe
The class is a small sample/biased
Q3 p^7
g^2
k^6
10-5m
n(n-7)
45
90
No not enough varnish cos she needs 50cm^2 but has 37.5cm^2
60
T=5x+20y
(-3,-2)
11 females
100-25pi
36%
I compared median, IQR and range
150
7x10^8
X<7
7/5
2 4/5 in mixed fraction form
4/5
x=-0.4 and 4.4
X=-1.1 and 5.1
X=-1.7 and 4.7
Angle MST 69
Probability is 0.04
X=2&6
a+b
-a+3b
3/4(a+b) for vector
Point s is on both lines and it is point where they intersect
100,25,4
Final questions is (3-root6)/12

Does anyone rememeber the information they gave us in the women question where the answer was11????

I got -0.4 and 4.4, and -1.1 and 5.1 (I think!)

Then for the simultaneous equations I can't remember the numbers but I think there was a 4.7.

would 85% be enough for an A*??

answer to the pi question?? 100-25pi
its not 75pi is it??

for q25, would it be fine if you left as

1/4 - root6/12 ??

How is question 11, 36%. Please can you show the working out.