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Mr M's OCR (not OCR MEI) Core 2 Answers 18th January 2013

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Mr M..what is the least raw mark you need to get in this paper in order to secure 100 ums..i may have dropped as much as 5-8 marks ??? Thanks..anyone else feel free to answer this too!
Original post by Chemengdon592
Mr M..what is the least raw mark you need to get in this paper in order to secure 100 ums..i may have dropped as much as 5-8 marks ??? Thanks..anyone else feel free to answer this too!


No-one knows as the papers haven't been marked yet but you won't get 100 UMS with those marks - sorry!
Reply 82
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olivers16
Original post by Mr M
No-one knows as the papers haven't been marked yet but you won't get 100 UMS with those marks - sorry!


Mr M roughly what raw mark do you think is needed to get an A? June was 57 so do you think it might like a little lower? Thank you for posting the answers!
Original post by Mr M
Mr M's OCR (not OCR MEI) Core 2 Answers January 2013



1. (i) 39.5 degrees (2 marks)

(ii) 15.3 cm (2 marks)



2. (i) Show ... (2 marks)

(ii) Show ... (4 marks)



3. (i) k=32k=\frac{3}{2} (2 marks)

(ii) y=x3−3x24+2y=x^3-\frac{3x^2}{4}+2 (5 marks)



4. (i) 32+80x+80x2+40x3+10x4+x532+80x+80x^2+40x^3+10x^4+x^5 (4 marks)

(ii) 1560 (3 marks)



5. (i) Show ... (3 marks)

(ii) x = 120 degs, 240 degs, 48.2 degs, 312 degs (4 marks)



6. (i) x=152x=\frac{15}{2} (3 marks)

(ii) (a) Verify and S∞=64S_{\infty}=64 (4 marks)

(b) x=−23x=-\frac{2}{3} (4 marks)



7. (i) Show ... (2 marks)

(ii) 15.2 cm (2 marks)

(iii) 9.76 cm^2 (5 marks)



8. (i) Translation by 3 units in the positive x direction (2 marks)

(ii) a = 8 (1 mark)

(iii) b = 6.48 (2 marks)

(iv) c=165c=\frac{16}{5} (4 marks)



9. (i) Show ... (6 marks)

(ii) a=1+73a=\frac{1+\sqrt{7}}{3} (6 marks)


Could you show a worked solution to 7(iii) and 8(iv).
Original post by missypink<3
Could you show a worked solution to 7(iii) and 8(iv).


I did these questions months ago. I have no idea what the questions were even about now.
Reply 85
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xT4Z1N4TRx
Nevermind thanks :-)
(edited 11 years ago)
Reply 86
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TheMan100
9
Does anyone know where I can find this past paper online?
Reply 87
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Jesserz
can anyone send me the link for the actual 2013 jan ocr math paper not the mei one... Or where the scans are cant find them anywhere :tongue:
Reply 88
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Jesserz
Original post by Mr M
Questions are on page 7 of the other OCR C2 thread in this forum.


What thread? :smile:
Reply 89
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rihanna13
How do you work out question 5???🙆
Can anybody tell me why you reject the negative solution for a on the last question?

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