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# Mr M's OCR (not OCR MEI) Core 1 Answers May 2013 watch

1. (Original post by Zakee)
For the first question I wrote down all those values, but after each value I said something like this:

I.e, for part 1i) I had the answer but after that I put, therefore as I was mentioning what
the value of a is in each part. Would I lose any marks as the examiner may mistake that to be my answer even though I did write down the answers such as and ? Thank you.
That's fine.
2. can someone show the stages to get to the answer of q8 ty
3. (Original post by Mr M)
That's fine.
Thank you, and thank you for diligence on producing mark schemes. It's exceptionally altruistic of you.
4. (Original post by Zakee)
Thank you, and thank you for diligence on producing mark schemes. It's exceptionally altruistic of you.
Thank you. You should see a doctor regarding the dictionary you swallowed.

5. Anyone got/already posted the question paper?

EDIT: Found them

6. Hi Mr M,
1. For 5.ii i think i said y=2/(x^2+5) How many marks do you think i woul lose?
2. What was the working for 10.iii so i can see if i got at least 1 method mark?
3. Would 64/72 be enough for the A?
If you could help that would be amazing
7. Hello Mr M, have you got the questions as well ( specifically Q2,Q6,Q7,Q8,Q10) Many Thanks
8. Mr M,

I was just wondering if you could tell me how many marks I would lose for the following?

For question 9 (ii) I stupidly put that x was between -3/2 and 1/4 (i.e. -3/2 < x < 1/4. Would I gain any marks at all for this?

For question 10 (iii) I set dy/dx equal to 0 but I factorised the remaining quadratic wrong. I got 3x(x-2) instead of 3x(x+2). I then went on to get x=2 and got the wrong co-ordinate (2,9). I chose (2,9) at the end though. How many marks would I lose in this particular case?

Thanks very much
9. (Original post by DutchyBoy)
Hi Mr M,
1. For 5.ii i think i said y=2/(x^2+5) How many marks do you think i woul lose?
2. What was the working for 10.iii so i can see if i got at least 1 method mark?
3. Would 64/72 be enough for the A?
If you could help that would be amazing
5ii no marks - sorry

10iii you can work out the answer yourself as someone has posted the paper above

10. (Original post by tommyhulk)
Hello Mr M, have you got the questions as well ( specifically Q2,Q6,Q7,Q8,Q10) Many Thanks
See two posts up from your post.
11. (Original post by AlmightyPhil)
Mr M,

I was just wondering if you could tell me how many marks I would lose for the following?

For question 9 (ii) I stupidly put that x was between -3/2 and 1/4 (i.e. -3/2 < x < 1/4. Would I gain any marks at all for this?

For question 10 (iii) I set dy/dx equal to 0 but I factorised the remaining quadratic wrong. I got 3x(x-2) instead of 3x(x+2). I then went on to get x=2 and got the wrong co-ordinate (2,9). I chose (2,9) at the end though. How many marks would I lose in this particular case?

Thanks very much

9ii) get 1 mark

10iii) get 3 marks probably
12. For question 5 (iii) I wrote compressed to the scale factor 2 on the y axis. Do you think I'll get any marks? :/
13. (Original post by akleema)
For question 5 (iii) I wrote compressed to the scale factor 2 on the y axis. Do you think I'll get any marks? :/
No sorry.
14. Hi Mr M
Just a few questions.
For 5(iii) I described the transformation of y = 1/x^2 to y = 2/x^2 not the other way around like the question asked. Would I lose 1 or 2 marks? I did put stretched parallel to the y-axis.
And for question 8 I left the line equation in y = mx + c form as opposed to ax + by + c = 0. How many marks would I lose for that?
15. (Original post by Hiryu)
Hi Mr M
Just a few questions.
For 5(iii) I described the transformation of y = 1/x^2 to y = 2/x^2 not the other way around like the question asked. Would I lose 1 or 2 marks? I did put stretched parallel to the y-axis.
And for question 8 I left the line equation in y = mx + c form as opposed to ax + by + c = 0. How many marks would I lose for that?
5(iii) get 1 mark

8 drop 1 mark
16. (Original post by Mr M)
5(iii) get 1 mark

8 drop 1 mark
Thanks for clarifying that. I can relax now knowing I have more than likely only lost 2 marks on that paper.
17. Mr M,
For question 9iii the one where you had to find the distance between the points, I stupidly forgot to put the quadratic formula over 2a, and instead put it over 2. Apart from that my method is completely correct. Could you please tell me how many marks I would have lost for that.
Thanks
18. think i got about 50%

Anyone know what grade this will be?
19. Looks like a dropped a mark! How did this paper compare difficulty wise with others?
20. (Original post by Mr M)
Mr M's OCR (not OCR MEI) Core 1 Answers May 2013

6. (i) Centre and radius (3 marks)
Thanks for posting answers, thought the paper was quite nice bar a few of the last ones!

For 6i) finding the radius I put root 40 and left it as that as I considered putting into simplified sure sure form but left it as it didn't say that in the question. How many marks do you think will I lose for it? 0,1 or 2?

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