# Edexcel GCSE Maths 2018 24th May Unofficial Markscheme Watch

Announcements

THIS IS HIGHER

DONT STRESS ABOUT WHAT GRADE YOU CAN GET BECAUSE LITERALLY IF YOU MISSED THE LAST 2 QUESTIONS OUT COMPLETELY IT’S STILL POSSIBLE TO GET A 9!! I HOPE YOU DO WELL IN THE REST OF YOUR GCSES!

1)a) 3 11/28 or 95/28 (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) (4 marks)

6)22,20 (Coordinates of squares) (5 marks)

7)216 cm^2n (area of triangle) (5 marks)

8)a) do the box plot correctly (2 marks)

b) 60 (2 marks)

9)a)6 (1 mark)

b)1 (1 mark)

c)1/9 (2 marks)

10) (3x+1)/2x (5 marks)

11) 90- 2x (4 marks)

12) 4 (n^2-n)+1 (4 marks)

13)5 (3 marks)

14) y= 100/9x^4 (5 marks)

15)a) (a+b)(a-b) (1 marks)

b) 12x^2+12 or 12(x^2+1) (3 marks)

16)0.12 or 3/25 (3 marks)

17)Sin graph move down two (2 marks)

18) rotation 180 degrees clockwise on point (-1,-2) (2 marks)

19) b = 2/3a + 2 (5 marks)

20)2,3,4 (5 marks)

The answer shown are correct. Trust that the answers are correct but I can’t quite remember the marks they were out of. Sorry.

DONT STRESS ABOUT WHAT GRADE YOU CAN GET BECAUSE LITERALLY IF YOU MISSED THE LAST 2 QUESTIONS OUT COMPLETELY IT’S STILL POSSIBLE TO GET A 9!! I HOPE YOU DO WELL IN THE REST OF YOUR GCSES!

1)a) 3 11/28 or 95/28 (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) (4 marks)

6)22,20 (Coordinates of squares) (5 marks)

7)216 cm^2n (area of triangle) (5 marks)

8)a) do the box plot correctly (2 marks)

b) 60 (2 marks)

9)a)6 (1 mark)

b)1 (1 mark)

c)1/9 (2 marks)

10) (3x+1)/2x (5 marks)

11) 90- 2x (4 marks)

12) 4 (n^2-n)+1 (4 marks)

13)5 (3 marks)

14) y= 100/9x^4 (5 marks)

15)a) (a+b)(a-b) (1 marks)

b) 12x^2+12 or 12(x^2+1) (3 marks)

16)0.12 or 3/25 (3 marks)

17)Sin graph move down two (2 marks)

18) rotation 180 degrees clockwise on point (-1,-2) (2 marks)

19) b = 2/3a + 2 (5 marks)

20)2,3,4 (5 marks)

The answer shown are correct. Trust that the answers are correct but I can’t quite remember the marks they were out of. Sorry.

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#2

(Original post by

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.

**Ranushka**)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.

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#3

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

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#4

(Original post by

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

**jamesgillian123**)did the first question say you have to give answer as a mixed number? or was it only the second one?

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#5

(Original post by

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.

**Ranushka**)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.

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(Original post by

Is this Higher or Foundation????

**Dilligent**)Is this Higher or Foundation????

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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.

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#10

(Original post by

Is Q4a not 19 ????

**Fgi 29**)Is Q4a not 19 ????

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(Original post by

Is Q4a not 19 ????

**Fgi 29**)Is Q4a not 19 ????

But I think the markscheme would be flexible because it depends on how we each rounded it.

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#13

(Original post by

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.

**Ranushka**)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.

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#15

(Original post by

25 days is the correct answer.

**Ranushka**)25 days is the correct answer.

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(Original post by

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)

**mallen975**)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)

I think that you possibly rounded a bit too vaguely meaning the answer was too far from the answer, but you will probably still get marks for working out.

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(Original post by

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

**acuteangle182**)Hi, does anyone remember the question for 2,7,13,19 ? Thanks

The answer was 140 houses.

7) This question was where they said that there is a right angled triangle with sides in the ratio of 35. The perimeter was 72cm. We had to find what the area of the triangle was.

The answer was 216cm^2

13) This was a question that asked was something like sqr root of 5 ( sqr root of 8 + sqr root of 18).

You had to simplify the answer to be in the form of a sqr root 10. Then find out what a was.

The answer was 5.

19) This question was something about a line and perpendicular line.

These aren’t the right numbers but it said something like A is (3,4) and P is (a,b). A line perpendicular to this line is 3y + 2x = 7. You had to find out what b was in terms of a.

The answer was b= 2/3a + 2

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#19

Do you think 26 will be accepted on q4a? That's the only answer I got different to the the mark scheme I mean surely there might be some leniency lool

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#20

say if i get an average 9 for paper 2 and paper 3 would i still get a 9 overall if i got a low 8 on this test.

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