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# AQA Maths Core 1+2 May 2013 watch

1. For that obtuse angle question, I left it as 1.27 and didn't take it away from pi. How many marks will I lose for that?
2. I left the obtuse angle question as 1.27 and didn't take it away from Pi. How many marks would I lose for that?
3. Hi guys,
I'm a GCSE Examiner for Edexcel but many of my A-Level students did the C2 exam the other day.
They wanted to know how to do Q3(binomials) and Q8(logs) so I decided to make a short video explaining how to do them.
These are not taken from the official mark scheme, this is just what I think marks will be awarded for.
Let me know if you find it useful and if you would like me to explain any other questions.
Apologies for the poor handwriting and bad lighting

C2 Question 3 - Binomials http://www.youtube.com/watch?v=rDtBZ2I46wI
C2 Question 8 - Logs - http://www.youtube.com/watch?v=2r0TCOthDPM
4. (Original post by Macintosh22)
For the core 1 1/2 n^0.5 I got 1/2 170^0.5. You substituted in the minimum value to get AB^2 = 42.5 and then that somehow works out to 1/2 170^0.5
I got 1/2sqrt10
The minimum value was 1/2
the last question had 5 multiplied by the equation. so i did 5*1/2, so sqrt5/2. which is the same as sqrt10/4.
if you sqrt10/4, you get 1/2sqrt10. which i put as my answer. pretty sure i got that right, i found a question like that on one of the 2009 c1 papers and asked my teacher about it just before the exam, and followed that method through
5. (Original post by KoKiKo)
I got the same answer for the integration, but most people seem to have got 27. I think we might have mad a mistake somewhere.
I got 117/2, then took away 63/2. got 27 for the area (had checked that like.. 5 times)
and the final one is correct. but i think i put just < not <= for my answer. there goes a mark :'(
6. (Original post by science-oliver)
Has anyone got the actual paper?
nope, but for C1 i found this
http://www.mediafire.com/view/?2k9nr79duuarg2n
7. (Original post by imispaceman)
I found this exam so hard.
C3 and C4 will blow your mind.

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8. (Original post by Hart1995)
C3 and C4 will blow your mind.

Posted from TSR Mobile

Fabulous news
9. (Original post by \$oulja)
nope, but for C1 i found this
http://www.mediafire.com/view/?2k9nr79duuarg2n
I found one for core 2 as well which I posted earlier but isnt it amazing that some person has been able to fill in the answers, in the original question paper, then scan it and post it online during the 1 hour 30 minute exam? seems illegal?
10. (Original post by sophie phil)
the coefficient which is 8 has been added to x only so it is stretch in the x direction by scale factor of 1/8
yes, thats what i put but other people got scale factor 2???
11. (Original post by exams567)
yes, thats what i put but other people got scale factor 2???
Yeah, it's scale factor 2. Bear in mind the 2 gets cubed as well, which is why it showed up as 8 (2^3).
12. (Original post by SAS18)
I found one for core 2 as well which I posted earlier but isnt it amazing that some person has been able to fill in the answers, in the original question paper, then scan it and post it online during the 1 hour 30 minute exam? seems illegal?
nah, i think a teacher probably got a copy of the paper, done it and posted it online after the exam.
13. Does anyone know what the grade boundaries will be for core 1?
14. Does anyone remember the actual question in core 2 that referred to finding k and what number question it was part of?
Can't really remember it but i think I put 2 as an answer.
15. (Original post by Ste3.14)
Does anyone remember the actual question in core 2 that referred to finding k and what number question it was part of?
Can't really remember it but i think I put 2 as an answer.
There you go m8! Tell me what you think you got in the exam. https://www.dropbox.com/sh/yfe6j2ckbwbw9qp/sQVw4Fn7Lc
c1 solutions
https://www.dropbox.com/sh/gtezd03r3oq4qhl/aRrLC_jIbc
c2 solutions
16. (Original post by StalkeR47)
There you go m8! Tell me what you think you got in the exam. https://www.dropbox.com/sh/yfe6j2ckbwbw9qp/sQVw4Fn7Lc
c1 solutions
https://www.dropbox.com/sh/gtezd03r3oq4qhl/aRrLC_jIbc
c2 solutions
Pretty sure a couple of those answers are wrong, but feel free to correct me.

Question 3(c)(i) - His translation is the wrong way around. He has it as (-6, 7). I believe it's (6,-7). It is asking you to map the circle (x+1)² + y² = 49 onto the circle C. This guy has mapped it the wrong way around, mapping the circle C onto (x+1)² + y² = 49. Two very similar albeit completely different answers.

Question 2(a)(ii) - He seems to have worked that out in a strange way. The way I did it, which seems a lot easier, I got x = 3/2 which I believe to be correct. This is my working out for it.

Who is right? Trying to work out how many marks I got in this exam so would appreciate any input! Thanks
18. (Original post by meagher94)
No sure about the translation but the working out you did would be correct.
19. (Original post by Gcayte)
No sure about the translation but the working out you did would be correct.
Thanks, looking back at the thread it looks like my translation was right too! I need 89 UMS in core 1 so fingers crossed
20. How can I access the answers for the Core 2 exam?

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