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# AQA A2 Mathematics MPC4 Core 4 - 9th June 2015 [Discussion & unofficial markscheme] watch

1. Guys, I've calculated the mean raw marks needed each for 80% (A) 90% (A*) and 100% for both C3 and C4.

I took the mean of each of the raw marks for those percentages between the year 2010-2014

Here are the means:

C3

80% : 59.67
Range : 57-63
(standard deviation for 80% on C3 is 1.9)

90% : 66.33
Range: 64-69

100% : 72.78
Range: 71-75

C4:

80% : 56.44
Range: 53-65

90% : 62.44
Range: 58-70

100% : 68.11
Range: 63-75
(standard deviation on 100% for C4 is 4.5)

Since a lot of you said C3 was hard, I guess it will be on the lower range of boundary marks
and vice versa on C4
2. (Original post by George1231)
70
That's too high. I would guess 67
3. can some one pleaseee do the sin2q question. I want to know how to do it
4. (Original post by Moskarasoul)
can some one pleaseee do the sin2q question. I want to know how to do it
Substitute the parametric equation into the normal equation.
5. (Original post by Moskarasoul)
can some one pleaseee do the sin2q question. I want to know how to do it
6. (Original post by ubisoft)
That's too high. I would guess 67
So you think A* will be around 62
7. (Original post by George1231)
So you think A* will be around 62
Yeah
8. (Original post by George1231)
So you think A* will be around 62
Not complaining if it is!

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9. (Original post by CD223)
Not complaining if it is!

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Nor am i hopefully i can get an A* but i really don't think 62 will be the boundary considering people found it easy.
10. (Original post by ubisoft)
Yeah
the last time people found a c4 exam nice was june 2010 after then its been considered a hard paper.
http://www.thestudentroom.co.uk/show...1304582&page=9 That was 67 for an A* and 71 cap for 100ums. So i doubt 62 will be an A*
11. (Original post by student0042)
This person has written BE is length = ½AC, when it should be DE. Therefore the other value of µ should have been 6.
Is BE not the same length as DE as E is the midpoint of BD?
12. (Original post by HenryC0302)
Is BE not the same length as DE as E is the midpoint of BD?
They are the same length, but I believe the other coordinate of B should be at the other side of E, not the other side of B.
13. (Original post by George1231)
the last time people found a c4 exam nice was june 2010 after then its been considered a hard paper.
http://www.thestudentroom.co.uk/show...1304582&page=9 That was 67 for an A* and 71 cap for 100ums. So i doubt 62 will be an A*
That normal cutting the curve again was a hard question, I think very few people must've got that.
14. (Original post by ubisoft)
That normal cutting the curve again was a hard question, I think very few people must've got that.
Yes i agree i thought there was some tricky questions but the overall response suggests the boundaries will be high.
15. Thank you!
(Original post by fotevaf)
16. (Original post by George1231)
Yes i agree i thought there was some tricky questions but the overall response suggests the boundaries will be high.
Maybe, but anyway I know I've got an A*, 100ums is just extra, if I don't get it then doesn't matter really.
17. (Original post by Moskarasoul)
Thank you!
I did it up to sinq= -3/4 and sinq=1/2

but then i just sin inverse'd it and i rejected one of the values

how many marks do you think that'll get me?
18. (Original post by ubisoft)
Substitute the parametric equation into the normal equation.
thanks

I did it up to sinq= -3/4 and sinq=1/2

but then i just sin inverse'd it and i rejected one of the values

how many marks do you think that'll get me
19. (Original post by fotevaf)
I really need an A* too

and I was sick on C3
I ended up doing mistakes that I'd practised many times before
for example on the graphs and I even missed the secx by accident..

I literally didn't see it and integrated xsqrt5 or something along those lines.
that's why I really need 100% for me to have more than a ._ chance of an A*

anyway

um according to last year's boundaries
your mark of 62 = 96% UMS

Attachment 423363

depending on how you did in c3
you have a good chance
basically, you need to have gotten at least 84%

um that's also depending on if this year's boundaries are similar to last years

I guess last year wasn't too hard either so I thought it would be similar

Last year was 54 = 80
59 = 90
64 = 100
Ah ok thanks for doing this for me, really appreciate it what'd you think you got on core 4? if you don't get the A* like you miss it by a few ums do you think the university will understand you perhaps had a bad day? :/ any advice about how to stop worrying and not let it affect my other exams? :/
20. (Original post by ubisoft)
Maybe, but anyway I know I've got an A*, 100ums is just extra, if I don't get it then doesn't matter really.
What do you think you've got on both papers?

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