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Edexcel C2 20th May 2015 *Official Thread* watch

1. (Original post by кяя)
Guys if I got about 62/75 in C1, 35-40/75 (top kek) in C2 and get a perfect 75/75 in S1 how likely is it I get an A overall?

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Certaiin!!

(But there are 3 ifs in the sentence)
2. (Original post by lulupixie)
I heard that the person who usually puts up unofficial mark schemes on here said we are going to have to wait a day or two because he's struggling with the paper...
That's hilarious...
3. (Original post by Jonooo123)
Yeah I think I may have dropped 1 mark there and 1 or 2 on the last question depending on ECF, although it's highly unlikely 100UMS will go down from 75/75 I hope it does
Everyone on this thread who think an A would be below 60 is deluded
and 100ums will be 74 at the lowest
4. how many marks was question 8 worth ??
5. Is there a mark scheme out yet? or can someone send me the paper? please and thankyous
6. (Original post by IDValour)
My answers (as far as I remember):
Q1) 1024 - 1280x + 720x^2
2.a) (x-2)^2 + (y+1)^2 = 20
b) x - 2y - 14 = 0
3.a) B-A = 48 (show that)
b) A = -96, B = -48
c) 3(2x+1)(x+4)(x-4)
4.a) Used cosine rule to show = 0.906
b) 40.9
c) 96.7
5.a) r = 8/9
b) a = 18
c) n = 28
6.a) 4x^5/2 - 10x^2 + C
b) 226
7.i) 0.264 (Vague memory of this)
ii) y = 3/2 and y = 1/3
8.i) pi/9, 4pi/9, 7pi/9
ii.a) k = 1+- sqrt (1+16k) / 8
ii.b) x = 0, 138.6, 221.4
9.a) Show that question (find h from value for V sub into formula for SA)
b) C = £483
c) d^2C/dr^2 = 12pi + 600/r^3 is greater than 0 as r = cube root 25 ---> Minimum
Except maybe 8)ii)a)
7. What do you need for a B
8. (Original post by ALEVEL_STUDENT)
I DO OCR. THEY BEST HAVE SYMPATHY FOR US!

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I think it's gonna be very different because I did physics unit 1 ocr and it was nothing like the past papers!
9. Looking at the answers above the lowest i may have got in a worst case scenario with no method marks is 65, but given that I probably got a few method marks, id say the highest is 70.

For the factorisation question who got a = -16 and b = -32 ?

I then went on to factorise it, and even though 2x+1 was a factor I ended up getting a horrible answer.
10. (Original post by 12345678zzz)
in my opinion, people who tend to use TSR are either those who find the papers difficult and want to express their anger or those who find the papers easy and want to share their answers to the world . so basically it's a diverse group of people.
Yup.
11. (Original post by KimberlyKumar)
Q1: 1024-1280x+720x square
Q2: (x-2) square -(y+1) square= 20
Part b i got gradient =1/2, x-2y-14=0
Q3: A=-96,B=-48
Fractorise =3(x-4)(x+4)(2x+1)
Q4:40.9 perimeter and 96.7 area
Q5: r=8/9,a=18,n=28
Q6=32+194=226
Q7:y=1/3 or y=3/2
Q8i/9,4pi/9,7pi/9
Cosx=1+/- square root of (1+16k) devided by 8
X=0, x=136.8 or 138.6 something,x=221.4
Q9: 483
this has made me feel pretty good!! for Q3 factorise i got 6 instead of 3 though?
12. Cosx=(1+-root16k+1)/8
13. What was the actual equation for the integration question (finding the shaded area on the graph)?
14. So guys, what do u think the grade boundaries is
15. (Original post by dripper)
If I didn't round and put the exact answer how many marks would I lose?
Probably just 1
16. (Original post by target21859)
Is it fine if I didn't take out a factor of 3? I got (2x+1)(3x+12)(x-4)
It said factorise f(x) completely so you would have got (n-1)/n Marks (I don't remember how many marks the question was but you would've lost 1 mark for not stating the complete factorisation)
17. (Original post by dripper)
If I didn't round and put the exact answer how many marks would I lose?
Probably just 1 or 2 max
18. (Original post by KimberlyKumar)
Q1: 1024-1280x+720x square
Q2: (x-2) square -(y+1) square= 20
Part b i got gradient =1/2, x-2y-14=0
Q3: A=-96,B=-48
Fractorise =3(x-4)(x+4)(2x+1)
Q4:40.9 perimeter and 96.7 area
Q5: r=8/9,a=18,n=28
Q6=32+194=226
Q7:y=1/3 or y=3/2
Q8i/9,4pi/9,7pi/9
Cosx=1+/- square root of (1+16k) devided by 8
X=0, x=136.8 or 138.6 something,x=221.4
Q9: 483
I got exactly the same as these except I forgot to take out the 3 in the factorising
19. HOW MANY MARKS WERE EACH PARTS QUESTION 5 and 8
20. (Original post by WTF_AM_I_DOING)
Is there a mark scheme out yet? or can someone send me the paper? please and thankyous
Nope sorry

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