Edexcel GCSE Maths 2018 24th May Unofficial Markscheme

1)a) 3 11/28
b) 1 3/5
2)140 houses
3)30% higher
4)25 days
5)a) Draw the pyramid
b)96 cm^2 (surface area of pyramid)
6)22,20 (Coordinates of squares)
7)216 cm^2n (area of triangle)
8)a) do the box plot correctly
b) 60
9)a)6
b)1
c)1/9
10)
11) 90- 2x
12) 4 (n^2-n)+1
13)5
14) y= 100/9x^4
15)12x-12 or 12(x-1)
16)0.12 or 3/25
17)Sin graph move down two
18)
19) b = 2/3a + 2
20)2,3,4

The answer shown are correct. I can’t remember what the other questions were.

did the first question say you have to give answer as a mixed number? or was it only the second one?

1)a) 3 11/28 (1 mark)
b) 1 3/5 (2 marks)
2)140 houses (3 marks)
3)30% higher (4 marks)
4)a) 25 days (3marks)
b) less days (1 mark)
5)a) Draw the pyramid (2 marks)
b)96 cm^2 (surface area of pyramid)
6)22,20 (Coordinates of squares) (5 marks)
7)216 cm^2n (area of triangle) (4 marks)
8)a) do the box plot correctly (3 marks)
b) 60
9)a)6 (1 mark)
b)1 (1 mark)
c)1/9 (2 marks)
10)
11) 90- 2x (4 marks)
12) 4 (n^2-n)+1 (4 marks)
13)5
14) y= 100/9x^4
15)a) (a+b)(a-b) (2 marks)
b) 12x-12 or 12(x-1) (3 marks)
16)0.12 or 3/25 (3 marks)
17)Sin graph move down two (2 marks)
18)
19) b = 2/3a + 2 (5 marks)
20)2,3,4 (5 marks)

The answer shown are correct. I can’t remember what the other questions were.

Is this Higher or Foundation????

Question 11:

Is Q4a not 19 ????

Is Q4a not 19 ????

To people who struggled with this question,

ABO was x and since BC was a tangent to the circle we know that angle OBC is 90 degrees.

OA and OB are both radii of the circle and therefore it is isosceles and that means that both angle OAB and ABO are x.

In a triangle there are 180 degrees so x + x + 90 = 2x +90. Then 180 - (2x + 90) = 90-2x.

25 days is the correct answer.

25 is technically more accurate but estimating in gcses is rounding every to 1 significant figure so surely it would round up to 20 which makes the answer 18.75 (19)

Hi, does anyone remember the question for 2,7,13,19 ? Thanks