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# Edexcel Maths C3 watch

1. (Original post by chaz1992)
Yep.

Their efforts across the maths forum haven't gone unnoticed
2. (Original post by mathsman939)
on the last part of 7d) i only got 1 answer is didnt know there were 2 answers. i wrote 126 minutes is that right or should i have wrote it as 2 hours and 6 minutes. how many marks would i lose for giving only 1 answer for 7d. and i also facked up on the 2f(1/2x) i put (3/2, -8) when it was (6,-8) and i knew it fack. im guessing id lose 1 mark for that because it was a 4 mark question so 1 mark for each correct coordinate. i think i got 72/75
126 should be fine

7d 2marks lost

1 mark on the other one I would think
3. (Original post by crazedmonkey09)
HI arsey, how many marks would i lose for not giving the y co-ordinates in q5d, simply forgot

Also in 7d i gave the second answer as 6.72 instead of 6.71, I can only think it is some kind of rounding error through the question or i read my own answer wrong, would i lose any marks for that given that the unrounded answer before was right?

I would say 2 but it could be 3

1 accuracy mark prob lost
4. Arsey, I know it's impossible to say yes or no, but how likely do you think it is to get an A, by getting 67/75 raw marks
Thanks
5. i think 67 will be nailed on for an A
6. i would say that is a guaranteed A. because usually 60 is an A and i dont think the paper was that easy for the grade boundaries to be low. probably like 62 for an A. i got 66/75 when i marked it but i was being harsh and didnt give any marks that i wasnt sure about so hopefully can still get 90% for the A*. but think im gona mess up c4
7. (Original post by Anon1993)
by any chance does anyone know where I can find the c4 grade boundaries for past exams?
been revising it - and am finding it p a i n f u l.
Thanks !
Module Session 100 90 80 (A) 70 (B) 60 (C) 50 (D) 40 (E)
C4 Jun-05 66 59 52 45 38 32 26
C4 Jan-06 75 68 61 53 45 38 31
C4 Jun-06 74 66 58 50 42 35 28
C4 Jan-07 72 65 58 51 44 37 31
C4 Jun-07 74 66 58 50 43 36 29
C4 Jan-08 67 61 55 49 43 37 31
C4 Jun-08 71 64 57 50 44 38 32
C4 Jan-09 73 66 59 52 45 38 32
C4 Jun-09 70 64 58 52 46 40 35
C4 Jan-10 75 68 61 53 46 39 32
8. Let's say that hypothetically I decided to get all of question 7 correct, and then go back and change my alpha to arctan (MINUS 1.5/2) for some peculiar reason. I then proceed to panic and swap all of the latter parts of q.7 for this value of alpha (MINUS 0.64 whatever the right alpha was). Does the maximum 2 mark loss still apply here or, in this hypothetical situation, with an alpha which is completely outside of the range am I simply deemed an idiot?

I would be hypothetically quite annoyed if I had in fact done this...
9. lets not get silly with these boundaries.

The highest ever 80UMS boundary on ANY new spec module exam was 67/75. The average is 58.5/75.

The highest ever 90UMS boundary on ANY new spec module exam was 71/75. The average is 65/75
10. ooff.. off a full mark i think.. 7d: i put it into 403 mins and 126mins format rather than putting it into 2:06pm and 6:43pm format.. what yah think? still consider or not..?
11. thanks for saying that arsey !
12. btw can u post the c3 grade boundaries for past years?
13. for the translation of f(x) = x^2

i put x^2 - 6x +5 = f(x), which is the same as (x-3)^2 -4, would they realise this because i didnt actually put (x-3)^2 - 4 down??

and for question 2, if you differentiated incorrectly can you still gain method marks for gettin y coord, for puttin m = -1/grad, for puttin y-y1 = m(x-x1) ??
14. (Original post by Arsey)
should do, daft method mind
Lol I know, knew in the exam it was too much work for 3 marks but I couldn't think of a better wat to do it, I facepalmed when I saw the ms and realised how easy it was, but ad least I got it right.
15. btw can u post the c3 grade boundaries for past years?
16. (Original post by Arsey)
lets not get silly with these boundaries.

The highest ever 80UMS boundary on ANY new spec module exam was 67/75. The average is 58.5/75.

The highest ever 90UMS boundary on ANY new spec module exam was 71/75. The average is 65/75
Thank you for this and the mark schemeS!
In a few pages back, you said that there was a similiar question about the range in one of the past papers, do you remember which past paper it is? I just want to look at it.
Thanks!
17. Wait.... Lets say you got 73/75, surely that means you got 97%/97 UMS? Confused.com
18. By the way Arsey, i really rate you dude, thanks so much for all the help you've given us, mark schemes and all. My teacher hesitated to tell me how many marks the first question was worth =/
19. (Original post by Arbitrage)
Wait.... Lets say you got 73/75, surely that means you got 97%/97 UMS? Confused.com
It depends on how well people do, the exam board will want a certain percentage of people to get an A. Say it was 12%, if it was a really easy paper and 12% got 70/75 (or more), then 70 would be an A, which is 80 UMS but not 80% of the marks. However next year the paper could be hard, and the top 12% got 55/75, it would be 55/75 for an A, again 80 UMS but not 80% of the marks
20. Hi, I can't find Arsey's answers to C3 June 2010. It is usually a great help to see the paper and I'm sure we are all always very grateful to Arsey. Can anyone point me to the answers post? Thank you (!).

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