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# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by jonnycope7)
If I got 63 on this paper, and 70 on C3, would I have an A* overall
To get an A* in Maths, you need to average C3 and C4 to be at least 90% (180/200 UMS), and at the same time get at least 80% overall. (480/600 UMS)So if you say you got 63 in C4, and 70 in C3, then by considering the standard grade boundaries (80% - A, 90% A* etc..):

C4: 63/75 = 84/100 UMS
C3: 70/75 = 93/100 UMS

so the average UMS in C3 and C4 is 89%. So that wont get you the A* even if you get at least 80% overall, however, the grade boundaries vary, and this year im definitely sure they will be low, so Im sure you will get an A* in the end. This year has been very hard to most people.
2. (Original post by aluff)
The answer was 13pi/ln3, I think you forgot to take away the volume of the cone.
what was the volume of the cone!?
3. (Original post by toddmcnugget)
Oh no, another one of these people. I'm not going to go through the effort of checking if another user is male or female, they is too confusing because English is a dumb language. Should I start using the Xe pronouns and conform to tumblrinas?

This may be considered offensive for some tumblrinas.
Spoiler:
Show

4. Might miss my offer because of this paper ;/
5. (Original post by curtiscowan10)
C1- 86 ums
c2- 67 ums
s1- 69/75 marks
m1- 52/75 marks
c3- 52/75 marks
c4- 60/75 marks
?
86 + 67 + 92 + 69 + 69 + 80 = 463/600 UMS, thats 77% overall, which is a B.
6. I have a few questions:

1) how many marks do I lose if I found K as 2 and continued so I got the area as half? Out of the total 8 marks of the question.

2) For the differential equation I found c correctly but at the end I couldn't get the final answer they wanted even doe part A was right. How many marks would I lose out of the 7?

3) for the years question how many marks do I lose if I did the question in degrees?

4) for the vector question how many marks do I get (if any) if I found the position vector of B for the shortest distance?

5) for the cone question, do you get one mark for writing V=pi integral of y2? Also due to a lack of time I went to write what I would do instead of doing it, but I wrote the radius will be 9 for the cone et and you do integral until 2 minus the volume of cone from Q to P?

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7. (Original post by C++)
That is not technically correct; as long as you carry the π/180, it is possible to use degrees.
Well, I suppose, but in the case of the question it would've been radians.
8. I think i may miss my insurance
9. (Original post by C++)
Do not say that; C3 boundaries will be lower, and even with C4 boundaries it is still a potential A*.
to be fair thats worst case scenario, as you can't really tell how many method marks there are
10. Guys is 480 UMS for an A* for an A? I checked the June 14 grade boundaries and it says 480 under the A bit?
11. (Original post by Bobi1996)
Both c3 and 4 very easy can't wait for results day!!!
Well done! I'm so glad for you, hope you get the grades you deserve/need! Well done once again

*no sarcasm involved I promise*
12. (Original post by Bobi1996)
Both c3 and 4 very easy can't wait for results day!!!
fy

tnx xoxo

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14. (Original post by 1504teal)
what was the volume of the cone!?
There was a formula at the bottom of the page. Ended up being 27pi/ln3 I think
15. C4 Edexcel Maths Paper with SOLUTION - 16 June 2015.pdf
C4 Edexcel Maths Paper with SOLUTION - 16 June 2015.pdf
C4 Edexcel Maths Paper with SOLUTION - 16 June 2015.pdf

http://www93.zippyshare.com/d/sxvc4j...une%202015.pdf

http://www93.zippyshare.com/v/sxvc4j9n/file.html
16. (Original post by cmfunk)
How many ums would 30/100 be ;/
I think you just answered your own question, unless you meant 30/75
17. (Original post by ASDuh97)
Guys is 480 UMS for an A* for an A? I checked the June 14 grade boundaries and it says 480 under the A bit?
To get an A* in Maths, you need an average of 90% UMS across C3 and C4 + 480 UMS overall. If you got 480 UMS overall, and got an 89% average or lower across C3 and C4, that would be an A.
18. I found this for answers

http://imgur.com/a/OMb2o
19. Guys :
100ums in C1, C2,
97 in S1
approx 85 in c3
40 in c4

Is an A possible
20. (Original post by ThatPerson2)
Well, I suppose, but in the case of the question it would've been radians.
In the case of the question you could have still carried the π/180. It is universal, irrespective of the case, that you can convert. Nevertheless, the answer in radians or converted degrees, is around 0.4.

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