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# 2016 May 25th Edexcel Core 2 Questions and answers. [Unofficial mark scheme] 2016 watch

1. (Original post by dididid)
i got between 70-73 marks how many ums would that be about?
after speaking to all the people I have spoken to maybe 93-96?
for the question where it was 5.75 etc did we have to leave as decimals
2. (Original post by Lola1244)
after speaking to all the people I have spoken to maybe 93-96?
for the question where it was 5.75 etc did we have to leave as decimals
thanks and not too sure but i don't think they specifically asked to leave any answer as a decimal
3. (Original post by Lola1244)
after speaking to all the people I have spoken to maybe 93-96?
for the question where it was 5.75 etc did we have to leave as decimals
Not specified. Mixed numbers and improper fractions are usually acceptable in the mark schemes. However I gave it as a decimal because it is usually the first answer given on the mark scheme.

I would agree with your UMS predictions.
4. (Original post by X_IDE_sidf)
Not specified. Mixed numbers and improper fractions are usually acceptable in the mark schemes. However I gave it as a decimal because it is usually the first answer given on the mark scheme.

I would agree with your UMS predictions.
Wasnt 9a 60x^2m^2? Find the area of the sector right? why do u have some weird answer for 9a?
5. For the very last question, i differentiated it again, then said as x is positive, the second differential must be positive, so it is a minimum. I didn't give the actual number, you think that's alright?
6. I didn't do the test, is 8 written correctly? Would you make it 32(2^2x) -7(2^x) +1 =0 then factorise/quadratic formula?
7. (Original post by Hasanalm)
Wasnt 9a 60x^2m^2? Find the area of the sector right? why do u have some weird answer for 9a?
8. (Original post by X_IDE_sidf)
Did it specify radians? Would I still get 2 marks for degrees?
9. (Original post by Hasanalm)
Did it specify radians? Would I still get 2 marks for degrees?
no because only works if theta is in radians.
10. (Original post by Hasanalm)
Did it specify radians? Would I still get 2 marks for degrees?
The formula for the area of a sector only works with radians
11. Thanks for getting this together OP. Just thought I'd convert it into a slightly more portable format. Hope it's of use
Attached Images
12. C2 Edexcel 2016 Solution.pdf (194.7 KB, 1047 views)
13. (Original post by Hasanalm)
Did it specify radians? Would I still get 2 marks for degrees?
The 1/2*r^2*theta formula is only for radians I think

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14. http://www.thestudentroom.co.uk/show....php?t=4117823 <-- If you want a better breakdown of the answers go here.
15. (Original post by natolevel)
Thanks for getting this together OP. Just thought I'd convert it into a slightly more portable format. Hope it's of use
Cool, thank you.
16. Ok as per

(Original post by natolevel)
Thanks for getting this together OP. Just thought I'd convert it into a slightly more portable format. Hope it's of use
I decided to neaten it up and make a LaTeX PDF myself, Here it is:
Attached Images
17. unofficial-mark-scheme.pdf (110.7 KB, 259 views)
18. (Original post by X_IDE_sidf)
Ok as per

I decided to neaten it up and make a LaTeX PDF myself, Here it is:
Ah nice that looks better, mine was a bit thrown together.

Thanks again for doing this, I came out of the exam worrying that I'd messed up but these solutions made me realise it hadn't gone that badly.
19. (Original post by dididid)
I swear it was (a-5)/9
20. (Original post by lolxcat)
For the very last question, i differentiated it again, then said as x is positive, the second differential must be positive, so it is a minimum. I didn't give the actual number, you think that's alright?
I did that too. Hopefully, it's fine
21. wait wait when u integrate for area do uhave to have a +C ?

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