You are Here: Home >< Maths

# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. In question 8)b) how many marks do you think there will be for the integration part of the question?
2. I choked, I cant believe I choked in this exam, the substitution should have been fine but... I forgot the basics, thankfully I miraculously guessed K correctly and followed on as normal ( I can't even remember how) so if I get a very lazy examiner I may even be able to trick them into giving me full marks (given just how much work I showed to get to that point) but that is unlikely. I thought that the paper was horrific when I first looked at it and freaked out, but in hind-sight, whilst it was pretty bad it was about the same difficulty as Solomon's (if not a-bit harder), I'm just banking now on low grade boundaries and good results for my other exams.
3. (Original post by mollybryant82)
I think you just answered your own question, unless you meant 30/75
I meant 30/75
4. (Original post by thatNoseyParker)
There was a formula at the bottom of the page. Ended up being 27pi/ln3 I think
Please tell me radius had to be worked out by working the hypotenuse and halving it and then squaring it to get r^2 (r^2 was something like 85/root2? or no)
5. (Original post by ThatPerson2)
Well, I suppose, but in the case of the question it would've been radians.
Guys it's okay I appreciate you both. Just as long as the final answer WAS 0.4...?
6. Guys someone please answer my question or I'll keep in reposting them

Posted from TSR Mobile
7. (Original post by Wahid1)
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?

Posted from TSR Mobile

Posted from TSR Mobile
3
3/4
1
0
2 mark if lucky.
8. Nice one jeff
9. (Original post by Fanta4TheBanter)
Thinks he's hard.

Posted from TSR Mobile
10. c3- 67
c4- 64
any chance of a*?
11. (Original post by cmfunk)
Guys :
100ums in C1, C2,
97 in S1
approx 85 in c3
40 in c4

Is an A possible
Average of 84.4 UMS per paper, which would be an A. So yes, it is indeed very possible.
12. (Original post by 1504teal)
Please tell me radius had to be worked out by working the hypotenuse and halving it and then squaring it to get r^2 (r^2 was something like 85/root2? or no)
Well that seems convoluted. It may have gotten the right answer, but you could have just used 9? Via the y coordinate of P
13. Where's Arsey's mark scheme?
14. Has arsey uploaded yet? Also is arsey'is name actually arsey? And who is Arsey?
15. (Original post by 1504teal)
Please tell me radius had to be worked out by working the hypotenuse and halving it and then squaring it to get r^2 (r^2 was something like 85/root2? or no)
The radius was the y coordinate of P. So no, you're method is incorrect. I'm sorry.
16. (Original post by 1504teal)
what was the volume of the cone!?
The bit below the tangent that was cut out of the volume of the solid:
They gave you the formula for the volume of a cone.
17. (Original post by TeeEm)
too late now ... all recognition can be done by substitution
make sure you can substitute
How accurately can you predict what grade you'll get in maths?
After looking at the papers that everyone and arsey have uploaded, I've been able to give myself a certain ums, but I'm not sure if it's completely accurate (I know how the mark scheme works so I gave myself a method mark where I thought I would get one)..
18. (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?
The total UMS needed for an A* is the same as an A... it's just that you have to get at least 180UMS on C3 + C4 combined for the A*. Potentially, someone with an A could end up with more UMS overall than someone with an A* in Maths... it's just how it works.
19. (Original post by josephinemar25)
Has arsey uploaded yet? Also is arsey'is name actually arsey? And who is Arsey?
He's a teacher and a God.
20. I think I got 100% in every paper but this one. I am so angry, I forgot to take 1 from the final answer.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 20, 2016
Today on TSR

### The most controversial member on TSR?

Who do you think it is...

### Uni strikes! How do they affect you?

Discussions on TSR

• Latest
Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE