AQA maths gcse paper 2 7th June 2018 Unofficial markscheme

username3996446

....

(edited 5 years ago)

Reply 1

Meganm104062002

2

I got -0.5 and 1.5 for the graph question
What is sector or segment for the first question

(edited 5 years ago)

Reply 2

El357

3

Let’s gather a markscheme! Reply with answers
•segment
•5:2
•400%
•liz (cosine rule) (86m)
•liz would still arrive first
•To show that there was only one exact point when the two graphs crossed you should’ve workout out that’s the two values of x we’re both -1/2
• x + 16

(edited 5 years ago)

Reply 3

Nifemi_5

6

Original post by Meganm104062002

I got -0.5 and 1.5 for the graph question

Is this for the higher paper?

3:2
539
x+16

Original post by El357

Let’s gather a markscheme! Reply with answers
•segment
•5:2
•400%
•liz (cosine rule) (86m)
•liz would still arrive first
•To show that there was only one exact point when the two graphs crossed you should’ve workout out that’s the two values of x we’re both -1/2
• x + 16

Is that the same as saying both roots wer (2x+2)(2x+2)

Reply 6

AvinashAshok

5

Original post by Meganm104062002

I got -0.5 and 1.5 for the graph question
What is sector or segment for the first question

Answer was segment for the first question.

Reply 7

AvinashAshok

5

Original post by El357

Let’s gather a markscheme! Reply with answers
•segment
•5:2
•400%
•liz (cosine rule) (86m)
•liz would still arrive first
•To show that there was only one exact point when the two graphs crossed you should’ve workout out that’s the two values of x we’re both -1/2
• x + 16

I swear the second one should be 3:2 and the last on your list should be x+9

Reply 8

mattlcfc

16

5.35<5.45 for error interval i think
4/9 for probability i think too

Reply 9

AlexeUK

6

Original post by AvinashAshok

I swear the second one should be 3:2 and the last on your list should be x+9

Yes, I also got 3:2 for that one. What answers did people get for the perimeter of the Pentagon question? I think I got 49 point something but I am not sure if I am correct.

Reply 10

13-hijazi-a

3

was 3:2 not 5:2

Original post by El357

Let’s gather a markscheme! Reply with answers
•segment
•5:2
•400%
•liz (cosine rule) (86m)
•liz would still arrive first
•To show that there was only one exact point when the two graphs crossed you should’ve workout out that’s the two values of x we’re both -1/2
• x + 16

Reply 11

Fallen_Angel_

12

AQA MATHEMATICS PAPER 2 CALCULATOR 8300/2H (H) Full unofficial mark scheme. Open to debate.

•

1) Segment

•

2) 6*10^7

•

3) 3:2

•

4) 400%

•

5) The lining up one

•

6) (480000/420000)*100=114.2857

114.2857-100=14.2857

(480000/100)*14.2857=68571.42857

68571.42857+480000=548571.43

NO

•

7) A) 15/20=3/4

17/40

B) 17/40

More attempts taken so more accurate sample

•

8) 15:8

Theo 18+4.50n

James 4n

N=6 Theo= 45 James=24

45:24=15:8

•

9) A) 8.35cm≤length<8.45

B) 41.75cm≤perimiter<42.25

•

10) V of Sphere= 4/3πr^3

V of hemisphere= 2/3πr^3

V=18000π cm^3

18000π/4000=14.137

Yes it takes just under a quarter of an hour.

•

11) A)first dice: (UNSURE ABOUT THIS ONE)

1/3 less than 3

2/3 3 or more

Second dice:

1/3 Less than 3

2/3 3 or more

1/3 Less than 3

2/3 3 or more

B) 1/3*1/3=1/9

C) 1/3*1/3=1/9

2/3*1/3=2/9

1/9+2/9=3/9=1/3

•

12) A) 2

B) answer stays the same

•

13) 8X^2-8/4x+4 =8(X^2-1)/4(X+1)

8(X^2-1) is DOTS

8[(X-1)(X+1)]/4(X+1)

(X+1) cancels out

8/4=2

2(X-1)=2X-2 a=2 b=-2

•

14) Sprinkler question

•

15) Men had more consistent scores than women because smaller IQR

•

16) A) d=m/v

Rearrange and solve for m

2400*3.8=9120kg

B)V=area of cross section*length

V=πr^2*L

3.8=π*(0.5)^2*L

3.8/π*(0.5)^2=L

L=4.84

Ill finish later

(edited 5 years ago)

Reply 12

AlexeUK

6

How did people find the paper 2 exam overall?

Reply 13

AvinashAshok

5

I got 50.6 ...

I used the sine rule to work out the lengths of the triangles sides then added to the perimeter of the 3 sides of the square

Reply 14

zesh-x

3

Original post by mattlcfc

5.35<5.45 for error interval i think
4/9 for probability i think too

Yes I got that too seems right

Reply 15

Beth375

9

Original post by zesh-x

Yes I got that too seems right

Same

Reply 16

AlexeUK

6

Original post by AvinashAshok

I got 50.6 ...

I used the sine rule to work out the lengths of the triangles sides then added to the perimeter of the 3 sides of the square

Yes, I did the same method using sine rule. Looks like we got similar answers too. What answers did others get? Please post.

Reply 17

mattlcfc

16

Original post by Fallen_Angel_

AQA MATHEMATICS PAPER 2 CALCULATOR 8300/2H (H) Full unofficial mark scheme. Open to debate.

•

1) Segment

•

2) 6*10^7

•

3) 3:2

•

4) 400%

•

5) The lining up one

•

6) (480000/420000)*100=114.2857

114.2857-100=14.2857

(480000/100)*14.2857=68571.42857

68571.42857+480000=548571.43

NO

•

7) A) 15/20=3/4

17/40

B) 17/40

More attempts taken so more accurate sample

•

8) 15:8

Theo 18+4.50n

James 4n

N=6 Theo= 45 James=24

45:24=15:8

•

9) A) 8.35cm≤length<8.45

B) 41.75cm≤perimiter<42.25

•

10) V of Sphere= 4/3πr^3

V of hemisphere= 2/3πr^3

V=18000π cm^3

18000π/4000=14.137

Yes it takes just under a quarter of an hour.

•

11) A)first dice: (UNSURE ABOUT THIS ONE)

1/3 less than 3

2/3 3 or more

Second dice:

1/3 Less than 3

2/3 3 or more

1/3 Less than 3

2/3 3 or more

B) 1/3*1/3=1/9

C) 1/3*1/3=1/9

2/3*1/3=2/9

1/9+2/9=3/9=1/3

•

12) A) 2

B) answer stays the same

•

13) 8X^2-8/4x+4 =8(X^2-1)/4(X+1)

8(X^2-1) is DOTS

8[(X-1)(X+1)]/4(X+1)

(X+1) cancels out

8/4=2

2(X-1)=2X-2 a=2 b=-2

•

14) Sprinkler question

•

15) Men had more consistent scores than women because smaller IQR

•

16) A) d=m/v

Rearrange and solve for m

2400*3.8=9120kg

B)V=area of cross section*length

V=πr^2*L

3.8=π*(0.5)^2*L

3.8/π*(0.5)^2=L

L=4.84

Ill finish later

a lot of these are wrong eg thr women got the highest score and probability was 4/9

Reply 18

p10

6

did anyone else get -1.5 for the last question
And forr the venn diagram was it 5 in the middle between chemistry and physics
did anyone alos get something like 2x-5 for one question