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# Arsey's S15 C1 Model Answers (attached to 1st post) watch

1. (Original post by usmanzubair)
Maybe june 2009 will repeat

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Many people would love to ...
2. (Original post by particlestudent)
Yeah I get that but where does it say to write the inequalities separately? I put it as 3-2sqrt2>p>3+2sqrt2
Thats where the graph comes in handy bro. See arseys answer for that one he wrote OR the middle of it

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3. (Original post by lukass12)
How many UMS points for 70 maybe 71 marks out of 75?
It depends on how well everyone else has done, I reckon >70+ for sure
for 8b)
if you wrote 3root10 as your answer, is the value of K implied as 3 by the examiners, as in do u still get all the marks for that question

cheeeeeeeeers
5. (Original post by Arsey)
Here are my solutions.

I didn't think it was an 'easy' paper, quite a few questions with tricky parts.

Expect average(ish) boundaries.
Hello, for the simultaneous did you have to put them in order as co-ordinates if you have shown how you calculated them all and for the summation if you calculated both parts (part b) correctly and didn't add properly for final result how many marks will be lost is it just an accuracy (theoretically)>
6. good sample of 300+ on the C1 difficulty
vote and see
http://www.thestudentroom.co.uk/show....php?t=3322317
7. would k be 12 because its the year they are talking about
8. (Original post by particlestudent)
Yeah I get that but where does it say to write the inequalities separately? I put it as 3-2sqrt2>p>3+2sqrt2
Because if you were to graph the quadratic, you would see it has 2 roots, and you were looking for the X values that create a y>0. Your answer creates y<0.
9. (Original post by TeeEm)
good sample of 300+ on the C1 difficulty
vote and see
http://www.thestudentroom.co.uk/show....php?t=3322317
How have the votes gone? I cant see the poll

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10. (Original post by TeeEm)
ONLY if coords are B marks(independent)
depends on how the marking scheme will be done after the sample provisional marking
thanks
for 9b, how many marks i'd get for saying, Sn = 10(34000+ (19*1500))
Thanks
11. (Original post by usmanzubair)
Thats where the graph comes in handy bro. See arseys answer for that one he wrote OR the middle of it

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He got the same inequalities as me but he wrote them separately. I'm asking you why we had to write them separately?
12. I think I may have got 56/75... Any idea what grade this would be? It didn't go as well as I'd have liked so I've just been stressing about it since it finished. Any reply would be greatly appreciated
13. (Original post by ums maestro)
How have the votes gone? I cant see the poll

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http://www.thestudentroom.co.uk/show....php?t=3322317
14. 58 max I think lol

****, my past paper marks made me too complacent
15. (Original post by naxiv)
thanks
for 9b, how many marks i'd get for saying, Sn = 10/2(34000+ (19*1500))
Thanks
sorry off teaching now
16. For question 4iia), if I used the arithmetic sequence formula and got the right answer do you think I will still get all the marks? (instead of 4*20)
17. (Original post by It'sTheArtLife)
I think I may have got 56/75... Any idea what grade this would be? It didn't go as well as I'd have liked so I've just been stressing about it since it finished. Any reply would be greatly appreciated
64/75.
so you got a low B
Because if you were to graph the quadratic, you would see it has 2 roots, and you were looking for the X values that create a y>0. Your answer creates y<0.
I don't understand, my inequalities are exactly the same as Arsey's just together.

3-2sqrt2>p>3+2sqrt2

Isn't that the same as p<3-2sqrt2 and p>3+2sqrt2????
19. (Original post by It'sTheArtLife)
I think I may have got 56/75... Any idea what grade this would be? It didn't go as well as I'd have liked so I've just been stressing about it since it finished. Any reply would be greatly appreciated
Last year I got 58/75 and that translated to 71/100 UMS, if thats any comparison
20. (Original post by bnosnehpets)
For question 4iia), if I used the arithmetic sequence formula and got the right answer do you think I will still get all the marks? (instead of 4*20)
You mean you used d=0?
There's nothing wrong with that at all, and I'm sure you'd get the marks if you got 80

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