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# Edexcel C2 20th May 2015 *Official Thread* watch

1. would your answers still get marked in the edexcel maths exam even if you forgot to label the answers?
2. (Original post by imfrassin)
so lets say the official c2 paper has been leaked, will we sit the regional instead?
No, all examiners have replacement papers written and ready to be printed and used if there's a problem.

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3. (Original post by idr335)
would your answers still get marked in the edexcel maths exam even if you forgot to label the answers?
Yes
But you would be sensible to lay out your working and answers clearly and label them. Make the markers job as easy as possible and ensure all possible method and answer marks are correctly awarded!

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4. (Original post by frozo123)
For part c) you could just try integrating 1/2 - 1/2cos2x between pi/3 and 0 and that should give you an idea whether your answer is correct or not
C2 students don't learn about double angle identities.

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5. We have to know all the volume and surface area formulas for each shape right?

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6. (Original post by Bloom77)
We have to know all the volume and surface area formulas for each shape right?

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Yes.

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7. (Original post by usmanzubair)
Yes.

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What are all the shapes again

Volume of a prism
Volume of a trapezium
Volume of a cube/cuboid
Volume of a pyramid
Volume of a cone
Volume of a cylinder

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8. (Original post by gdunne42)
No, all examiners have replacement papers written and ready to be printed and used if there's a problem.

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I am copying a post by the section moderator for everyone's reassurance.

Right, I'm taking the executive decision to lock this thread.

The C2 paper HAS NOT, I repeat, HAS NOT been leaked. There will NOT be a reserve paper. Everyone should not waste their time worrying about this and should actually do some revision.

Any problems, message me directly.

This post is by nirgillis on the thread are C2 papers harder
9. Geometric series question

How do we know when to use n or n-1

Thank you!!

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10. (Original post by Bloom77)
Geometric series question

How do we know when to use n or n-1

Thank you!!

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n-1 is when working out nth term e.g. the 6th or 9th term

n is when working out the sum of a geometric series e.g. total of first 10 terms

11. Hi, I was wondering in the Trapezium Rule questions, when we find the estimated area, and we get e.g. '0.3175' but the mark scheme have rounded it up to 'awrt 0.32' do we still get all the marks? They haven't stated to round up the answer in the actual question.
12. (Original post by Ahsen2015)
Hi, I was wondering in the Trapezium Rule questions, when we find the estimated area, and we get e.g. '0.3175' but the mark scheme have rounded it up to 'awrt 0.32' do we still get all the marks? They haven't stated to round up the answer in the actual question.
Awrt means answer which rounds to

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13. (Original post by physicsmaths)
Awrt means answer which rounds to

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so would you still get all the marks?
14. (Original post by somebrownguy)
n-1 is when working out nth term e.g. the 6th or 9th term

n is when working out the sum of a geometric series e.g. total of first 10 terms

Thanks but sometimes they don't use the forumla
Check the specimen paper, and do the geometric question
See what I mean?

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15. Has anyone done any solomon papers and how are they finding it?
16. (Original post by Ahsen2015)
so would you still get all the marks?
Yes you should. I would write out the full answer then write out a answer to 3sf.

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17. (Original post by physicsmaths)
Yes you should. I would write out the full answer then write out a answer to 3sf.

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okay thanks, how you finding core 2? you done all the past papers?
18. (Original post by Bloom77)
Thanks but sometimes they don't use the forumla
Check the specimen paper, and do the geometric question
See what I mean?

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They are using the formula, it's just 2000 is year 1 so 2002 is the 3rd year
19. (Original post by Ahsen2015)
okay thanks, how you finding core 2? you done all the past papers?
Im an intruder just here to help as I sat it last year.

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20. any last minute tips?

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